How to detail a window after Blueskin ® VP100 installation Blueskin ® VP100 is a next generation vapor permeable air barrier that picks up where traditional polymeric wraps leave off. Ideal for wood frame construction, Blueskin ® VP100 is a fully adhered, peel-n-stick system that eliminates air leakage while functioning as a water-resistant. Blueskin WB Window and Door Flashing is a self-adhering membrane consisting of an SBS rubberized asphalt compound, which is integrally laminated to a blue-engineered film. The membrane is specifically designed to be self-adhered to a prepared substrate. Introduction This installation manual includes materials and installation procedures for Henry® Blueskin® VP100 Self-Adhered Water Resistive Air Barrier system. Blueskin® VP100 meets the IRC and IECC air barrier requirements for a water resistive barrier (WRB) as referenced in ICC ESR-2975.
- How To Install Blueskin Window Flashing Screen
- How To Install Blueskin Window Flashing Light
- Henry Blueskin Flashing
- How To Install Blueskin Window Flashing Light
- POST a QUESTION or COMMENT about how to buy & apply peel and stick flashing tape around window & doors or at housewrap joints or holes.
InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.
Peel and stick flashing tape or membrane questions & answers:
Frequently-asked questions and answers about how to buy, install & detail stick-on flashing tape around windows & doors.
This article series describes the selection and installation of peel-and-stick flashing membranes used on building exteriors to seal housewrap joints and to seal against air or water leaks around windows, doors, or other openings. Our photo at page top shows Typar® flashing tape installed above a new window. A better practice laps the housewrap over rather than under the stick-on flashing tape, a better detail but one omitted by many builders.
We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.
Using Building Flashing Membranes - Peel & Stick Flashing Tape
Question: 'blue skin' for trailer roofs
(May 11, 2014) alex said:
can you put blue skin on a travel trailer roof and paint over with rubber paint
Reply:
Alex I'm not sure what the blue skin product is (name and product name would allow some research. But certainly there are a number of roof-over materials for leaky trailer roofs, including rubber coatings. Without a membrane these may not be a lasting repair.
What I would not try is simply rolling out a self-adhering flashing membrane on your trailer's roof - don't use a product that was not designed to be left exposed to the weather. It won't endure.
Question: flashing membranes adherence to old masonry chimneys
(July 28, 2014) Jean said:
Can peel and stick flashing membranes be used on masonry (old chimney) or only on wood decking?
Reply:
Jean,
Some of the flashing membrane product lines listed above such as FortiFlash® include products designed to adhere to cleand dry masonry.
Unfortuntately, too-often I have not seen good adhesion of a peel-and-stick flashing membrane along a masonry surface such as an older, rough-surfaced masonry brick or block chimney. And these membranes are not intended to be left exposed to the weather. Further, even if it adhered, you'd need counterflashing over the upper edge of the membrane to assure a durable installation.
Question: peel-and-stick membranes in roof valleys
(Aug 12, 2014) Donald said:
Can peal and stick membranes be used on steel roof valleys?
Reply:
Donald, the flashing tapes we describe here are expected to be covered by a finish material. These membranes do add valuable leak-insurance used beneath a finsish-material placed in a roof valley.
Question: will flashing tapes seal around a screw
(Aug 31, 2014) Gary said:
Will Flashing Tapes and membranes self seal around a screw, particularly the screw that holds the exterior finish (i.e. Siding) on to the substrate?
Reply:
Gary
Great question. My answer is yes .. and sometimes no.
Peel-and-stick membranes are intended to seal around small-diameter penetrants such as staples and roofing nails. Where I've seen leaks through a P&S membrane on a roof they were traced to a mis-hammered roofing nail that folded over and whose head made a significant cut in the membrane.
I've also come across a few tears in flashing membranes that were subjected to twisting forces from a screw as it penetrated the material, in particular if the flashing material was not itself thoroughly bonded to the substrate surface.
Where I've seen leaks over doors and windows that were traced to flashing tape troubles the issue was either failure of the tape to bond to an older weathered surface or to someone having driven a 16d nail through the material.
And of course no flashing tape on a building wall, say over a window, is going to be able to prevent leaks that run down behind the housewrap from some leak point higher on the building.
Question: Blueskin SA compatable for a tie-in with a 2-ply hot asphalt vapour retarder
(Sept 3, 2014) Leo said:
Is Blueskin SA compatable for a tie-in with a 2-ply hot asphalt vapour retarder on a flat roof transition?
Reply:
Blueskin SA is an SBS-modified self-adhering membrane made of SBS rubberized asphalt compound that has been laminated onto a blue polyethylene reinforcing film.
Blueskin is produced by the Henry Company, 999 North Sepulveda Blvd., Suite 800 El Segundo, CA 90245 310-955-9200. Contact the company at E-mail: [email protected] Phone: 800-486-1278
The material is designed to bond or 'stick to' prepared concrete, concrete block, primed steeol, mill-finished aluminum (remove any oils), anodized aluminum, galvanized metal, gypsum board and plywood.
The material (as well as others of this type) is not designed to bond to a hot asphalt-sealed surface.
Question:
How To Install Blueskin Window Flashing Screen
(Oct 7, 2014) Anonymous said:
We will be pouring a large 70' patio with stamped concrete. What type of flashing should be used when connecting new concrete landings to the house wood frame support? The landings are both 12' wide where they connect to the house and will allow entry into two 8 foot wide doorwalls.
Reply:
Please take a look at DECK FLASHING
Question: how to remove flashing membranes from concrete
11/06/2014 Steve said:
I bet this isn't asked often. Once you apply Fortiflash to concrete, how do you get the stuff off. We removed an old shed that was sealed to the concrete driveway with this stuff, and outside of grinding it off, we haven't had any luck.
Reply:
Steve,
Removing a well-adhered flashing membrane such as FortiFlash can be difficult on any surface. At least on concrete you could heat it gently to try peeling it off but I'd bet that the result will leave black residue on the concrete surface.
For other readers, FortiFlash(R) is a waterproof flashing membrane produced by Fortifiber Building Systems Group (R), a Fernley NV USA company. The product is a self-adhesive membrane reinforced by high-density polyethylene film that the manufacturer also refers to as “rubberized asphalt” and is described more technically as “a self-sealing SBS modified asphalt core laminated to a cross-laminated high-density polyethylene film reinforcement with a siliconized paper release sheet.”
It’s possible that the installer used Fortiflash 40(r) for floors - a vapor retarder system that can be adhered to concrete. It looks as if the composition of that product is similar.
As such if you can physically peel off the reinforced sheet you might use an organic solvent on the remaining modified asphalt adhesive. The company’s literature points out that the product is not compatible with EPDM (Rubber roofing), flexible PVC products and some sealants - but I don’t find much help from those products when considering how to remove FortiFlash membranes.
My best advice would is to contact the company directly for advice on the safest and most effective solvent to use.
Contact Fortifiber Building Systems at
1-800-773-4777 for sales and technical assistance. Website: www.fortifiber.com
Question: how to remove peel and stick flashing tape or membranes
(Nov 6, 2014) Steve said:
I bet this isn't asked often. Once you apply fortiflash to concrete, how do you get the stuff off. We removed an old shed that was sealed to the concrete driveway with this stuff, and outside of grinding it off, we haven't had any luck.
I bet this isn't asked often. Once you apply fortiflash to concrete, how do you get the stuff off. We removed an old shed that was sealed to the concrete driveway with this stuff, and outside of grinding it off, we haven't had any luck.
Reply:
Steve,
Removing a well-adhered flashing membrane such as FortiFlash can be difficult on any surface. At least on concrete you could heat it gently to try peeling it off but I'd bet that the result will leave black residue on the concrete surface.
For other readers, FortiFlash(R) is a waterproof flashing membrane produced by Fortifiber Building Systems Group (R), a Fernley NV USA company. The product is a self-adhesive membrane reinforced by high-density polyethylene film that the manufacturer also refers to as “rubberized asphalt” and is described more technically as “a self-sealing SBS modified asphalt core laminated to a cross-laminated high-density polyethylene film reinforcement with a siliconized paper release sheet.”
It’s possible that the installer used Fortiflash 40(r) for floors - a vapor retarder system that can be adhered to concrete. It looks as if the composition of that product is similar.
As such if you can physically peel off the reinforced sheet you might use an organic solvent on the remaining modified asphalt adhesive. The company’s literature points out that the product is not compatible with EPDM (Rubber roofing), flexible PVC products and some sealants - but I don’t find much help from those products when considering how to remove FortiFlash membranes.
My best advice would is to contact the company directly for advice on the safest and most effective solvent to use.
Contact Fortifiber Building Systems at
1-800-773-4777 for sales and technical assistance. Website: www.fortifiber.com
Question: builder left out flashing membrane now I have a leak
(Nov 7, 2014) Steve K. One piece all episodes free to watch. said:
I have an leak that is giving me an immense headache. My builder talked me into creating a storage room under my front porch. Because the porch large exposed to the weather, I instructed him to install a waterproof membrane under the concrete slab and to lap it under the Tyvek membrane on the house's exterior.
I have an leak that is giving me an immense headache. My builder talked me into creating a storage room under my front porch. Because the porch large exposed to the weather, I instructed him to install a waterproof membrane under the concrete slab and to lap it under the Tyvek membrane on the house's exterior.
He forgot that detail, and I did not discover the mistake until the house was completed. The porch is poured concrete over a metal pan. The exterior structure consisted of OSB (all seams taped), one inch of Dow blue foam (all seams taped), Commercial D housewrap, 1x4 pressure treated strapping, and then cement siding.
When it rains, the most exposed portion of the porch leaks into the storm room, wetting the framing and introducing water into my very tight house. (The builder is MIA at this point.) I looked around for solutions but not found one. Taking off some of the siding, cutting back to the sheathing, and installing some flashing over the OSB and concrete seems like the best option, but I am not knowledgeable enough about building materials to know for sure.
Reply:
Steve
I am not sure I've got the details clearly in mind for the case you describe. Use our CONTACT link found at page top or bottom to send me photos and a sketch if you can and I might make more sense of this leak problem.
I'm a bit worried that flashing that terminates under ground and runs up under building siding risks giving an attractive pathway for termites (if you've got those critters in your area)
And I'm unclear on how the storage room is open to or protected from the weather.
So pending a better understanding I can just offer a very general comment that flashing is expected both to keep water out of a construction intersection of planes and to direct water out onto an exposed surface where it can drain away without causing trouble.
Question:
(July 30, 2015) daren said:
if i was to use this tape in conjunction with liquid rubber, how would the rubber adhere to the tape?
would it be better to rubber the seam and the apply tape..followed by rubber
if i was to use this tape in conjunction with liquid rubber, how would the rubber adhere to the tape?
would it be better to rubber the seam and the apply tape..followed by rubber
Reply:
That's not an application I've seen described by the flashing tape manufacturer. I am doubtful that liquid rubber or any other adhesive will bond well to what I think is a super-smooth polyethylene type or mylar type covering left on the exposed side of the flashing tape. It might adhere to a metallic covering used on some tapes.
Question: is it wrong to use flashing tape underneath a window or door
Pat said:
Can someone please clarify this issue? Most everywhere I've read about window flashing tape, it states to never apply it to the bottom of the window on the outside so water can exit to the house wrap instead of under the house wrap.
Can someone please clarify this issue? Most everywhere I've read about window flashing tape, it states to never apply it to the bottom of the window on the outside so water can exit to the house wrap instead of under the house wrap.
My siding crew taped the bottom of the window like shown in this article but I'm less worried about it because there's an open flap of house wrap below the window where water can eventually exit. Also, I insisted on a rain screen and the house wrap should let water escape so it should get stuck inside. Either way, I don't think taping the bottom is hardly ever recommended.
Reply: no but it must be installed before the window or door is set in place.
Pat: You're quite correct. The photo showing peel and stick flashing tape applied over the window bottom flange and onto the building WRP or housewrap is not a recommended detail and might trap water in the window rough opening. Please see complete details at WINDOW & DOOR FLASHING TAPE DETAILS - separate article
What is the best way to flash around windows & doors and how should flashing tape be used at these openings? This article series shows best practices, common practices, and some not-so-good practices using peel-and stick flashing tape around windows, doors, and other building wall penetrations.
Article Series Contents
- PEEL & STICK FLASHING MEMBRANES
- WINDOW & DOOR FLASHING TAPE DETAILS - separate article
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Technical Reviewers & References
- Best Practices Guide to Residential Construction, by Steven Bliss. John Wiley & Sons, 2006. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also Wiley.com. See our book review of this publication.
- Eric Galow, Galow Homes, Lagrangeville, NY. Mr. Galow can be reached by email: [email protected] or by telephone: 914-474-6613. Mr. Galow specializes in residential construction including both new homes and repairs, renovations, and additions.
- Paul Galow [Website galowconsulting.com ] - technical consultant on networking, LAN design, applications support. Galow Consulting Services [Website galowconsulting.com ] , 914-204-1749, email: [email protected]
- John Rudy, Advantage Home Inspections, Flemington N.J. 08822 home inspector, 908-806- 6364, Home, Radon & Termite Inspections, Central & Parts of North New Jersey, email: [email protected]
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
- Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
- Decks and Porches, the JLC Guide to, Best Practices for Outdoor Spaces, Steve Bliss (Editor), The Journal of Light Construction, Williston VT, 2010 ISBN 10: 1-928580-42-4, ISBN 13: 978-1-928580-42-3, available from Amazon.com
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Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material.
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- POST a QUESTION or COMMENT about how to buy & apply peel and stick flashing tape around window & doors or at housewrap joints or holes.
InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.
Peel and stick flashing tape or membrane:
This article describes the selection and installation of peel-and-stick flashing membranes used on building exteriors to seal housewrap joints and to seal against air or water leaks around windows, doors, or other openings.
Our photo at page top shows Typar® flashing tape installed above a new window. A better practice laps the housewrap over rather than under the stick-on flashing tape, a better detail but one omitted by many builders.
We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.
Using Building Flashing Membranes - Peel & Stick Flashing Tape
How to buy & use flashing tape or peel and stick housewrap tape to prevent water leakage through building exteriors, cause, cure, prevention. Using flashing tapes & membranes on buildings.
What is the best way to flash around windows & doors and how should flashing tape be used at these openings?
This article shows best practices, common practices, and some not-so-good practices using peel-and stick flashing tape around windows, doors, and other building wall penetrations.
Article Series Contents
- PEEL & STICK FLASHING MEMBRANES
- WINDOW & DOOR FLASHING TAPE DETAILS - separate article
This article series discusses best practices construction details for building exteriors, including water and air barriers, building flashing products & installation, wood siding material choices & installation, vinyl siding, stucco exteriors, building trim, exterior caulks and sealants, exterior building adhesives, and choices and application of exterior finishes on buildings: paints, stains.
Portions of this article are adapted/paraphrased with permission from Best Practices Guide to Residential Construction by Steven Bliss, courtesy of Wiley & Sons.
Peel-and-Stick Flashing Tapes, Types, Uses, Applications
Typically ranging in width from 4 to 12 inches, these peel and- stick membranes greatly simplify the task of creating a continuous barrier to water entry around doors, windows, decks, and other problem areas. Flashing tapes are faced with reinforced polyethylene or foil on the outer surface and a peel-away paper on the adhesive surface.
The foil faced products may be left exposed to the weather permanently, whereas the plastic-faced tapes should not be exposed to sunlight and weather for more than 30 days (longer for some brands) since UV radiation will degrade the facing.
Comparing Modified Bitumen vs Butyl Peel and Stick Flashing Tapes
Most flashing membranes are made from modified bitumen, the same rubberized asphalt used in eaves flashing. Some use a more expensive butyl rubber core, which stays more flexible in cold weather and is more stable at high temperatures.
Butyl products also bond better to difficult substrates than modified bitumen and can be peeled off and adjusted during installation.
Moldable Flashing - Butyl-based
A unique butyl-based flashing tape from DuPont, called Tyvek FlexWrap®, has a wrinkled facing that allows it to be molded easily to irregular shapes such as the head flashing of round-top windows. It can also be bent to create a pan flashing at window sills without any cutting and folding at the corners. Despite the higher material costs, labor savings make this product appealing for tricky applications.
Applications for Flashing Tapes
These products offer several distinct advantages over metal flashings: They are easily bent or molded for an accurate fit, can accommodate settlement and shrinkage movement, are self-sealing around nail holes, and bond well to a variety of materials, including metal, wood, plywood, and vinyl window flanges.
Flashing tapes provide long-lasting waterproof protection if installed correctly. Oriented-strand board (OSB), concrete, and other masonry materials, however, can be problematic for some of the rubberized-asphalt flashings and may require priming for a good bond. Consult with the product’s specifications for compatible surfaces and priming requirements.
Guide to the Installation of Flashing Membranes
To obtain the best results with these products and be protected by the manufacturer’s warranty, it is advisable to follow the manufacturer’s recommendations. These vary from product to product, but generally they address the same issues: application temperature, priming, installation techniques, and compatibility with surrounding materials.
Temperature Effects on Peel-and-Stick Flashing Membranes
In general, the rubberized asphalt (modified- bitumen) products start to lose stickiness at around 50°F and will not bond much below 40°F. Unless you are working with a rubberized-asphalt product specifically formulated for low-temperature applications, a butyl-based product is a better choice in cold weather.
Very high temperatures can also be problematic for rubberized-asphalt membranes. When subjected to high temperatures and pressure, for example, when squeezed under a dark-colored metal flashing exposed to direct sun, the material will soften and begin to flow.
Unless formulated for high temperatures and labeled “hi-temp,” most modified bitumen will begin to soften between 185°F and 210°F. High-temperature formulations can tolerate up to around 240°F, but are generally not as sticky.
Substrates: Bonding Flashing Membranes & Tapes to Solid Wood, Plywood, Vinyl, Metal, OSB
Each manufacturer specifies which products are safe to bond to and which require priming. Solid wood, plywood, vinyl window flanges, and metal are usually fine as long as they are free of oil and dust. Some manufacturers of rubberized-asphalt tapes recommend that all materials be primed for best performance, particularly in cold weather.
Most require that concrete and masonry be primed, and some require the priming of OSB and gypsum sheathing as well.
Many published details show asphalt-rubber flashing tapes bonded to asphalt felt and plastic housewraps. While these are rarely listed as suitable substrates in product literature, manufacturers of flashing tapes claim that their products will bond satisfactorily to both these materials as long as they are clean.
Do not expect a good bond to dirty housewrap that has been exposed to the weather for a month or to any dirty job-site material. For that reason, it is always best to detail flashings and to layer materials so that they shed water even if the adhesive bond fails.
Compatibility Flashing Membranes & Tapes With Vinyl
Rubberized-asphalt flashings should not be in direct contact with flexible vinyl flashings. The asphalt compound will draw the plasticizers out of the vinyl, causing the asphalt to soften and flow and the vinyl to become brittle.
The rigid polyvinyl chloride (PVC) used in window flanges, however, is generally not a problem. Rubberized-asphalt flashings should also not come into contact with any caulks or sealants unless specifically formulated for that use. Like soft vinyl, sealants may react with the asphalt, causing it to flow and stain the adjacent materials, such as window flanges.
Butyl-based flashings are compatible with most construction caulks and sealants, but they should never be installed in contact with any asphalt-based products such as roofing cement or bituminous flashing membranes.
These may degrade the butyl and undermine its ability to seal. In these applications, rubberized-asphalt is a much better choice.
Watch out: FortiFlash, for example, is not compatible with EPDM [rubber roofing] or flexible (plasticized) Polyvinyl Chloride (PVC) based products. FortiFlash and Moistop E#-Z Seal are not compatible with some sealants. Consult with sealant manufacturer for compatibility information.
Applying Pressure is Important in Stick-On Flashing Membranes
Flashing tapes must be pressed firmly into place to ensure full contact and a good bond. Some manufacturers recommend using a hard rubber roller for best results.
Splashback Protection and Other Uses for Peel-and-Stick Flashing Tapes & Membranes
While most flashing tapes are used around doors and windows, they can be put to good use wherever water penetration is an issue. Other applications include band joists, deck ledgers, inside and outside corners, and any areas subject to frequent wetting.
On wall areas adjacent to a deck or abutting a roof, for example, where splashback or snow buildup is likely to wet the siding, sections of membrane up to 36 inches wide can protect wall assemblies. Make sure to lap all layers of flashing, sheathing wrap, and adhesive membrane so that water is directed to the outside of the building, even if the adhesive bond fails.
Caution re Cold-Side Vapor Barrier: Don't Cover Entire Walls with Peel-and-Stick Flashing Membranes
Watch out: In cold climates, covering an entire wall section with waterproof membrane will create a cold-side vapor barrier, potentially leading to serious moisture problems and wood decay within the wall cavity. A section of membrane up to 3 feet wide, however, is unlikely to cause problems.
How to Installing Peel and Stick Flashing Tape Over & Under & Along the Sides of Windows & Doors
Question: which is the right way to install peel and stick flashing below a window
2016/09/13 Pat said:
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Can someone please clarify this issue? Most everywhere I've read about window flashing tape, it states to never apply it to the bottom of the window on the outside so water can exit to the house wrap instead of under the house wrap.
My siding crew taped the bottom of the window like shown in this article but I'm less worried about it because there's an open flap of house wrap below the window where water can eventually exit. Also, I insisted on a rain screen and the house wrap should let water escape so it should get stuck inside. Either way, I don't think taping the bottom is hardly ever recommended.
[Click to enlarge any image] This photo of flashing tape installed below a window and over the window's bottom flange or fin does not show the very best installation practice. Photos by D Friedman & Eric Galow, Galow Homes.
Reply:
Pat:
You're quite correct. The photo showing peel and stick flashing tape applied over the window bottom flange and onto the building WRP or housewrap is not a recommended detail and might trap water in the window rough opening.
Please see complete details at WINDOW & DOOR FLASHING TAPE DETAILS - separate article
Sources & Installation Manuals for Flashing Tapes and Membranes - where to buy, how to install
- Avenco www.avenco.com Butyl flashing tape
- Bakor, Inc. www.bakor.com Blueskin self-adhesive, rubberized-asphalt flashing tape
- Berry Plastics Flashing Tape Manual, [PDF] Berry Plastics & Polyken Nashua Tape Products, distributed by various sources including Best Materials, retrieved 2016/09/13, original source:
www.bestmaterials.com/PDF_Files/flashing-tapes-manual.pdf - Blueskin SA, Henry Company, 999 North Sepulveda Blvd., Suite 800El Segundo, CA 90245310-955-9200. Contact the company at E-mail: [email protected]: 800-486-1278
- Carlisle Coatings and Waterproofing www.carlisle-ccw.com Self-adhesive, rubberized-asphalt flashing tapes and membranes
- Dupont www.construction.tyvek.com StraightFlash and moldable FlexWrap Butyl flashing tapes
- Dupont Flashing Systems Manual, prior, [PDF] retrieved 2016/09/13, original source:
www.dupont.com/content/dam/assets/products-and-services/construction-materials/assets/K17933-FlashingGuidelinesBEFORE-10-30-11.pdf - Dupont Flashing Systems Manual - current, [PDF] retrieved 2016/09/13, original source:
- Fortifiber® Moistop® and FortiFlash® self-adhesive and nonstick rubberized-asphalt flashing tape.
FortiFlash® is a waterproof flashing membrane produced by Fortifiber Building Systems Group®, a Fernley NV USA company. The product is a self-adhesive membrane reinforced by high-density polyethylene film that the manufacturer also refers to as “rubberized asphalt” and is described more technically as “a self-sealing SBS modified asphalt core laminated to a cross-laminated high-density polyethylene film reinforcement with a siliconized paper release sheet. Contact the company directly for advice on the safest and most effective solvent to use. - Grace Construction Products www.graceconstruction.com Vycor self-adhesive, rubberized-asphalt flashing tapes and membranes
- Illbruck Sealant Systems www.willseal.com/usa Self-adhesive butyl and foil-faced butyl flashing tapes
- MFM Building Products Corp. www.mfmbp.com FlexWrap (foil-faced) and FutureFlash self-adhesive, rubberized-asphalt flashing tapes and membranes
- Pella Window Flashing Details, [PDF], retrieved 2016/09/13, original source:
- Polyguard Products www.polyguardproducts.com Windowseal self-adhesive, rubberized-asphalt flashing tapes and membranes
- Protecto Wrap Co. www.protectowrap.com Standard and moldable (Protecto Flex) self-adhesive, rubberized-asphalt flashing tapes
- Sandell Manufacturing Co. www.sandellmfg.com Rubberized-asphalt, PVC, and EPDM flashing tapes
- Typar Flashing Tape Manual, [PDF] retrieved 2016/09/13, original source: www.typar.com/assets/downloads/pdf/TYPAR_WPS_Install_Instructions_5-19-15.pdf
- Zip Wall Installation Manual, [PDF] retrieved 2016/09/13, original source: sweets.construction.com/swts_content_files/102935/821515.pdf
Fortifiber Building Systems Group
Fernley, NV
1-800-773-4777 for sales and technical assistance.
Website: www.fortifiber.com
Fernley, NV
1-800-773-4777 for sales and technical assistance.
Website: www.fortifiber.com
Fortifiber flashing tape manual, [PDF] retrieved 2016/09/13, original source: http://www.fortifiber.com/pdf/install_guides/IG_window_flashing_method_a1.pdf
Reader Q&A - also see the FAQs series linked-to below
On 2020-02-04 by (mod) - reliability & limitations of using peel-and-stick membranes as window & door pan flashing
Thanks for the photo and post, Richard;
I agree that durable pan flashing is a concern and that peel-and-stick membranes may not be up to the job; I prefer using a fabricated metal pan flashing and rely on the membranes only as an underlayment around the opening.
And in a freezing climate, even a modest amount of water under a window or door and atop the tape-fabricated pan flashing can cause heaving, door opening problems, or longer-term damage.
We can read what manufacturers like Pella have to say about using flashing tapes and membranes,
We can read what manufacturers like Pella have to say about using flashing tapes and membranes,
at WINDOW & DOOR FLASHING TAPE DETAILS
where I include links to various installation manuals and guides
Typically you'll see that the instructions say 'install a window pan' OR you can rely on flashing tapes but with some additional construction details such as exact placement of beads of sealant.
Watch out: the principal shortcoming of relying on peel-and-stick flashing tapes, speaking from personal experience, is that they don't always stick well to all surfaces. I've had problems with Typar and other tapes coming loose from
- OSB sheathing
where I include links to various installation manuals and guides
Typically you'll see that the instructions say 'install a window pan' OR you can rely on flashing tapes but with some additional construction details such as exact placement of beads of sealant.
Watch out: the principal shortcoming of relying on peel-and-stick flashing tapes, speaking from personal experience, is that they don't always stick well to all surfaces. I've had problems with Typar and other tapes coming loose from
- OSB sheathing
- Plywood sheathing
- housewrap
- even framing lumber if it's not perfectly dry, free from contaminants, and not mill-glazed
- use in cold weather, applied to cold surface
My friend and sister site Steve Bliss - BuildingAdvisor.com makes a similar point at 'Flashing Membranes' at buildingadvisor.com/materials/exteriors/flashing-membranes/
Let's see if we can find some research on the durability of window and door pan flashing that relies on tapes alone.
My friend and sister site Steve Bliss - BuildingAdvisor.com makes a similar point at 'Flashing Membranes' at buildingadvisor.com/materials/exteriors/flashing-membranes/
Let's see if we can find some research on the durability of window and door pan flashing that relies on tapes alone.
Watch out: however it's also the case that window and door pans should be designed with slope and with an open exit along their outer face so that any water that enters the pan will drain out. I realize that 'should be' is arm-waving; nobody frames a window or door rough opening with an outwards pitch on the bottom horizontal member.
That's where using a pre-fab metal or PVC pan flashing can help us as those are often fabricated with the necessary slope.
Below: a PVC door pan flashing from SureSill, https://www.suresill.com/ as sold at Home Depot stores
Below: a PVC door pan flashing from SureSill, https://www.suresill.com/ as sold at Home Depot stores
On 2020-02-04 by Richard - most all peel and stick membranes are not designed nor warranties to hold standing water.
Interesting and educational piece.
Our efforts in this area have discoverer most all peal and stick membranes are not designed nor warranties to hold standing water.
Standing water such as a window will pan flashing.
[Photo above of Envelopeseal peel-and-stick membrane used as a door pan]
On 2019-09-02 by (mod) - can you use flashing tape over top of step flashing?
Not if left exposed to the weather
On 2019-09-02 by Anonymous
can you use flashing tape over top of step flashing
On 2017-10-12 by (mod) - flashing tape integration with housewrap
Anon: removing self-adhesive flashing tape can give you a devil of a time if it's well-adhered to a surface.
if the flashing tape was applied to housewrap, we'd cut the housewrap above and alongside the flashing tape, then pull it away; we install new housewrap as needed up under the lower edge housewrap just above the cut-area
If the flashing tape was applied directly to wood or other hard surfaces you might find it slightly easier to remove by heating it a bit with a hair dryer. It's difficult to pull off and almost impossible to pull off without damaging the wood or other surface below - except when it wasn't pressed firmly in place onto a clean dry surface in the first place.
if the flashing tape was applied to housewrap, we'd cut the housewrap above and alongside the flashing tape, then pull it away; we install new housewrap as needed up under the lower edge housewrap just above the cut-area
If the flashing tape was applied directly to wood or other hard surfaces you might find it slightly easier to remove by heating it a bit with a hair dryer. It's difficult to pull off and almost impossible to pull off without damaging the wood or other surface below - except when it wasn't pressed firmly in place onto a clean dry surface in the first place.
On 2017-10-12 by Anonymous
How do you remove once applied
On 2017-03-14 by (mod) -
Yes, assuming you're going to cover that underlayment with new roofing material. But I'm unclear why you'd need an adhesive seam sealant on roofing felt underlayment since if the felt is in poor shape or damaged normally it would be removed and replaced, or a small damage area would simply have new felt overlaid in that spot.
Normal roofing felt under shingles is absolutely not a water barrier since it is punctured by the roofing nails.
If you need an underlayment that seals around roofing nails you'd be smarter to use an ice-and-water shield product that is wider and more economical in this application than flashing tape.
Normal roofing felt under shingles is absolutely not a water barrier since it is punctured by the roofing nails.
If you need an underlayment that seals around roofing nails you'd be smarter to use an ice-and-water shield product that is wider and more economical in this application than flashing tape.
Watch out: however in my experience peel and stick membranes do not bond well to roofing felt
On 2017-03-14 by MFP
How To Install Blueskin Window Flashing Light
Can this be used to cover 'seam' between existing sheets of roof felt which have separated in parts?
On 2017-01-22 by (mod) - don't apply flashing membranes in cold or wet weather
Do not Apply in cold / wet weather
On 2017-01-22 by 4000 elevation
Does this say to NOT use in climates that get cold, snow, or just to not APPLY during cold season?
On 2017-01-20 by Anonymous
how long can the peel and stick stand the exterior with out being covered from the sunlight ?
On 2016-09-14 by (mod) - never apply it to the bottom of the window on the outside
Pat,
Thank you for asking: you're entirely correct that our photo of flashing tape set OVER the window flange of a new window installed into a R.O. is not the best practice.
To have space for illustrations and source citations I've included your question and a very detailed reply at WINDOW & DOOR FLASHING TAPE DETAILS
There you'll see that flashing tape IS used below windows but best practice installs it under not over the window flange. Best practice includes a window sill pan OR fabricates one from flashing tape.
Take a look, comment, and let me know what questions remain. Thanks. -Daniel
Thank you for asking: you're entirely correct that our photo of flashing tape set OVER the window flange of a new window installed into a R.O. is not the best practice.
To have space for illustrations and source citations I've included your question and a very detailed reply at WINDOW & DOOR FLASHING TAPE DETAILS
There you'll see that flashing tape IS used below windows but best practice installs it under not over the window flange. Best practice includes a window sill pan OR fabricates one from flashing tape.
Take a look, comment, and let me know what questions remain. Thanks. -Daniel
On 2016-09-13 by Pat -
RE-posting
Pat said:
Can someone please clarify this issue? Most everywhere I've read about window flashing tape, it states to never apply it to the bottom of the window on the outside so water can exit to the house wrap instead of under the house wrap. ..
My siding crew taped the bottom of the window like shown in this article but I'm less worried about it because there's an open flap of house wrap below the window where water can eventually exit.
Pat said:
Can someone please clarify this issue? Most everywhere I've read about window flashing tape, it states to never apply it to the bottom of the window on the outside so water can exit to the house wrap instead of under the house wrap. ..
My siding crew taped the bottom of the window like shown in this article but I'm less worried about it because there's an open flap of house wrap below the window where water can eventually exit.
Also, I insisted on a rain screen and the house wrap should let water escape so it should get stuck inside. Either way, I don't think taping the bottom is hardly ever recommended.
..
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- FLASHING on BUILDINGS - home
- UNDERLAYMENT DOUBLE vs SINGLE where we discuss use of flashing membranes at roof eaves
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Technical Reviewers & References
- Best Practices Guide to Residential Construction, by Steven Bliss. John Wiley & Sons, 2006. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also Wiley.com. See our book review of this publication.
- John Rudy, Advantage Home Inspections, Flemington N.J. 08822 home inspector, 908-806- 6364, Home, Radon & Termite Inspections, Central & Parts of North New Jersey, email: [email protected]
Henry Blueskin Flashing
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