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Roofing Detail Membrane 18 in. x 50 ft. Roll Self Adhered Roofing Underlayment

$7580

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Price:
$7580

Product Overview

Grace Roof Detail Membrane is the only product available today designed specifically for waterproofing critical roof detail areas. Based on the Grace Ice and Water Shield technology, Grace Roof Detail Membrane is a flexible product that conforms tightly to common roof details such as skylights, chimneys and dormer walls. Available in 9 in. and 18 in. W, it is the optimal choice for valleys and transition areas such as ridges, rake edges and drip edges.
  • Easy to handle and apply
  • Seals around nails
  • Will not crack, dry out or rot
  • Protects under all standard sloped roof coverings
  • Slip resistant surface
  • Underwriters Laboratories Inc. Class A fire classification under fiber-glass shingles and Class C under organic felt shingles (per ASTM E108/UL 790)
  • California residents

Info & Guides

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Compare Similar Roof Underlayments

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Roofing Detail Membrane 18 in. x 50 ft. Roll Self Adhered Roofing Underlayment
Best SellerFeltBuster 1000 sq. ft. Synthetic Roofing Underlayment RollTop RatedGrace Select 36 in. x 65 ft. Roll Self Adhered Roofing Underlayment (195 sq. ft.)WeatherWatch 200 sq. ft. Mineral-Surfaced Peel and Stick Roof Leak Barrier Roll
BrandGCP Applied TechnologiesGAFGCP Applied TechnologiesGAF
NameRoofing Detail Membrane 18 in. x 50 ft. Roll Self Adhered Roofing UnderlaymentFeltBuster 1000 sq. ft. Synthetic Roofing Underlayment RollGrace Select 36 in. x 65 ft. Roll Self Adhered Roofing Underlayment (195 sq. ft.)WeatherWatch 200 sq. ft. Mineral-Surfaced Peel and Stick Roof Leak Barrier Roll
Price
$7580
$8423
/roll
$8620
/roll
$14047
/roll
Ratings
(67)
(267)
(52)
(50)
Application MethodPeel & StickNailPeel & StickNail,Peel & Stick
Underlayment/Barrier TypePeel & Stick UnderlaymentSynthetic UnderlaymentPeel & Stick UnderlaymentLeak Barrier
Unrolled length (ft.)752506566.7
FeaturesNo Additional FeaturesCorrosion Resistant,Water ResistantHigh Wind Resistant,Water ResistantExtreme Cold & Ice
Product Width (in.)18 in48 in3636 in
Roofing Product TypeUnderlaymentUnderlaymentUnderlaymentUnderlayment
View ProductView ProductView ProductView Product

Specifications

Dimensions

Coverage Area (sq. ft.)
75 ft²
Product Thickness (in.)
.04 in
Product Width (in.)
18 in
Unrolled length (ft.)
75

Details

Application Method
Peel & Stick
Color Family
Black
Features
No Additional Features
Fire Rating (UL 790)
Class A
Material
Asphalt
Product Weight (lb.)
19.4 lb
Returnable
90-Day
Roofing Product Type
Underlayment
Squares (100sq. Ft)/Roll
112
Surface Recommended
Concrete Roofs,Metal,Wood
Texture
Smooth
Underlayment/Barrier Type
Peel & Stick Underlayment

Warranty / Certifications

Manufacturer Warranty
10 Year Material Warranty

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.4
    out of 67 reviews
  • 92% recommend this product
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Showing 1-30 of 67 reviews
GCP Applied Technologies Roofing Membrane is an adhesive backed membrane used to seal out wind driven rain and water leaks from ice dams. This is a roll 18 inches wide by 50 feet long. It is typically used as an underlayment for new roofing installs such as valleys, ridges, chimneys and transition areas. It has a strong adhesive backing that adheres to most construction materials such as wood decking, metal, concrete or gypsum. I found this product to be of good quality with superior adhesion and easy to work with.
by
  • Recommended
1 person found this helpful
GCP APPLIED TECHNOLOGIES ROOFING DETAIL MEMBRANE 18 IN. X 75 SQ. FT. ROLL SELF ADHERED ROOFING UN...
GCP APPLIED TECHNOLOGIES ROOFING DETAIL MEMBRANE 18 IN. X 75 SQ. FT. ROLL SELF ADHERED ROOFING UNDERLAYMENT (112 SQ. FT.). This product advertise that it has a strong adhesion to the roof deck: helps ensure watertight seal, protecting roofs from harsh weather conditions High quality seal around roofing nails: delivers best in class roof leak protection; providing peace of mind against costly call backs Forms superior laps: helps ensure a watertight installation with no special treatment of the laps. so far it has turned away one strong down pour of rain this month.
by
  • Recommended
1 person found this helpful
I had to replace some roof decking because the roofer didn't seal the cap correctly and over time...
I had to replace some roof decking because the roofer didn't seal the cap correctly and over time water seeped into the old decking. I had some Ice and water shield from a previous job from years ago.After I replaced the decking I figured I would use the ice and water shield I had on hand instead of buying new tar paper. I used the detail membrane on the very cap of the roof. It's only 18" wide so it was much easier to work with than full size rolls. I used the imbedded line to split the backing down the middle of the pieces so I could work with one half and place it under the edge of my solar panels. Once that in place I could easily peel the backing off of the other side and cover the roof cap cleanly. It was so much easier to work with than traditional ice and water shield. Since this was a repair job the area I was working on was irregular shaped. I used this product on the edges to square it up and traditional I&W shield to cover the larger areas. I put down one day and shingled over it the next. It seems like it held tight and made a great seal.
by
  • Recommended
Great peel-and-stick waterproof roofing membrane. Backing releases easily from membrane. Good idea to place membrane in place, peel back and stick a small portion, make sure it is aligned, and then peel the backing out from underneath the membrane. My application was to waterproof a small, narrow parapet prior to installing the cap. Applying it to the top of the parapet and then wrapping it down the sides was a little challenging at first. I then scored the backing in two places parallel to the length with a utility knife with the blade depth set so just the backing was cut. I peeled the center section of the backing off and rolled the flashing on top of the parapet and sealed it down. The sides hung over either side and it was easy to peel the backing off and seal the sides individually. The membrane has some type of reinforcing that maintains dimensional stability—i.e. no stretch. It is not moldable, but suitable for flat applications. Be sure to read the installation instructions and specifications (which are on the HD website) before using. The product is self-sealing (around smooth nails so HDG nails should not be used) and hand nailing is recommended. It is not recommended for climates that see high temperatures—like Arizona. If roofing or metal flashing nails are removed after the membrane is in place, the holes need to be resealed as the holes will not self-seal in this case. I offer two cautions if working around finished surfaces. First, do not set the box down on finished surface such as decking, especially if they are wet or damp. The red dye in the package will bleed onto the finished surface. Second, the membrane is a little wide than the backing sheet so the end of the membrane roll will stick to the surface and leave black rings on the surface that are difficult to remove.
by
  • Recommended
1 person found this helpful
A quality roofing membrane will save you as a homeowner a lot of tears later so make sure your co...
A quality roofing membrane will save you as a homeowner a lot of tears later so make sure your contractor is using a good one like this and always make sure your bid has the details like this. It's the little details that make all the difference in the world. As a contractor, word-of-mouth is your best form of advertising so this is one of those must-have items.
by
GCP Applied Technologies Roofing Detail Membrane 18 in. x 75 sq. ft. Roll Self Adhered Roofing U...
GCP Applied Technologies Roofing Detail Membrane 18 in. x 75 sq. ft. Roll Self Adhered Roofing Underlayment (112 sq. ft.) Country of origin - USA My experience w/ this product - it worked. And it was easy to work with. From its appearance, I associated it w/ the miracle tape that seals leaking barrels and glass-bottom boats (the ads call it a miracle!) In real life, your "roll of tape" is about 18inches wide, and it's pretty heavy! The box has detailed instructions and the application process is both intuitive and solo-worker-friendly. Pro-tip: the product slices were most manageable when I had them in warm sunlight shortly before setting them into place. Instructions specify 40F or better. The cooler it is, the less flexible around corners and other contours. Second tip - gas or kerosene on a rag, for blade cleanup; dish-washing liquid soap (the kind they use on birds in oil-slicks) helps clean the fingers. Third tip - cutting it on the roll is possible, but can lead to cut-thru - setting on the roll-box before dropping the blade prevented that problem.
by
  • Recommended
Works good. Does the job and even makes it little easier. My older roof has a lot valleys and roo...
Works good. Does the job and even makes it little easier. My older roof has a lot valleys and roof edges that hang over other sections of roof. Once area was cleared of old tar paper was able to apply to the new plywood. It is super sticky and seals well around the nail heads. The main feature I found helpful was the "Rip cord split release on demand" It is basically a strip of backing that runs down the center of the backing so you can split the backing and adhere one side at a time, creating a tight fit to angles.
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  • Recommended
GCP Applied Technologies Roofing Detail Membrane is highly rated in the roofing industry so I was...
GCP Applied Technologies Roofing Detail Membrane is highly rated in the roofing industry so I was pleased to use it for the roof on the storage shed I was building. For that reason, I gave it a recommended product rating. When packaged, it is in a box that provides a very sturdy handle on the end making it easy to haul up to the roof. I am not a professional roofer, just a DYI guy for this application so my criticisms are based on my lack of experience with the product. One good feature is that it has a VERY aggressive adhesive which would be considered a plus but I found it very difficult to work with. Can't handle it with gloves as is recommended due to the material composition. The backing release paper would constantly tear rather than come off cleanly but again, there might be something I am missing. When I tried to lay it out, if I got a wrinkle in it, there was no way to smooth it out or reset it. I didn't have much luck going around a corner where it would stretch and lay in place without peeling back or wrinkling. There is also supposed to be a ripcord-on-demand feature to split the membrane when installing it but try as I did, I never could find it. Went to the GCP website hoping to see an installation help video but there was none, only a document that matched what was on the box. I ended up finishing the job using the GCP Vicor Pro flashing as it was much easier to work with. This product is proudly made in the USA.
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  • Recommended
1 person found this helpful
I applied GCP Roofing Detail Membrane to the header and vertical support beams of my garages exte...
I applied GCP Roofing Detail Membrane to the header and vertical support beams of my garages exterior to waterproof them prior to installing new PVC trim boards to replace old wood trim boards that were rotted or starting to rot. The Grace replaced old brittle roofing felt that was nailed in place, which to me, seems to defeat its purpose of providing a waterproof barrier. The roofing membrane was easy to use and to apply. It has an adhesive on one side, which is adhered to the substructure, and is not at all sticky on the other side or the face. The product trims easily with a sharp pair of cutting shears, but was difficult to cut with a razor knife. I have a decking and a replacement window project coming up, and plan to cover the ledger board and flash the window with this product to protect the wood against damage from moisture and insects. The 18-inch width is more than adequate for my use, and the dimensions of the product make it easy to work with. Once the protective waxed paper backing is peeled away, the product is very sticky, so you need to take care to ensure its applied properly the first time to wood that is free of dust. The product can be overlapped for a watertight seal. This membrane is not as thick as Grace Ice and Water Shield so it presses into corners better. Its too soon to know how the product will hold up against time and the elements, but this product is far better than the brittle, paper thin felt paper it replaced. I like that it is self-adhesive and recommend it for roofing as well as other applications around the home.
by
  • Recommended
I had the opportunity to use this great detail membrane. I used it as an underlayment around dif...
I had the opportunity to use this great detail membrane. I used it as an underlayment around difficult to seal areas. Used on a skylight install, a natural rock chimney( very hard to seal normally), a transition roof over a porch. It stretches and conforms plus seals without the use of sealants or nails. Being flexible it worked well on a short valley also. No leaks was my goal and after our last torrential rain with severe wind gusts I am one happy user. Just always remember water runs downhill when lapping pieces.
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  • Recommended
These underlayment products have come along way over the decades. While they were always better t...
These underlayment products have come along way over the decades. While they were always better than felt, application was tedious and borderline dangerous. In particular, whenever you're working at the roof edge, you want to minimize fall risk with quick, reliable, convenient attachment. Grace gets this and I know the innovation here was brainstormed by seasoned roofers. The ripcord backing system works like a charm and really does allow one person installation for larger jobs. Paper backing is stout and resists ripping when peeling. The installed top finish is tough enough to walk on, even at steeper pitches. I haven't set this in a valley, but I expect the cord crease makes centering a breeze. If I had any quibble, it would be more measure markings on the top of this detail material like they do on their other products, but that's a petty gripe. We'll keep this in the shop to use for small roof projects and repairs, although it's workable for just about any single-side adhesion project that needs a water seal. This version is thicker than standard underlayment and quite malleable with surprising tensile strength.
by
  • Recommended
Great quality roof membrane. The smaller roll is easier to handle than the wider rolls. And light...
Great quality roof membrane. The smaller roll is easier to handle than the wider rolls. And lighter to pack around as well. Many uses for this material. If you haven’t ever used it, read the instructions and once you stick it down you won’t be moving it. Seals nail penetrations but won’t self seal if nail is removed so patch any holes prior to covering with your choice of roofing material.
by
  • Recommended
It is easy to work with. You don’t need any special tools to cut it with. If you are not using th...
It is easy to work with. You don’t need any special tools to cut it with. If you are not using the entire roll at once, be careful when you are unrolling it. The bottom edge is sticky and will tear the brown backing from the roll exposing the adhesive side. If you have freshly cut plywood, make sure you clean off any wood particles or dust to maximize adhesion.
by
  • Recommended
I have not yet installed this product. I have however, spoken to other builders and read reviews ...
I have not yet installed this product. I have however, spoken to other builders and read reviews as well as technical information about the product. I'm very excited to use it on the project underway at this time. Many of my builder friends speak highly of it. It is a rubberized asphalt formulation has been proven to form a watertight bond. This self adheres making installation faster. It seals around roofing fasteners so there are no nail holes to leak. It just makes a superior shield and it is faster to install I hope to use this at the back of a shed roof to protect against heavy rain backing up to the framing. I think this will be just the ticket to make my project sound over time. The more I hear about it the more excited I am to use it.
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  • Recommended
Nice product this comes 18 inches by 50 feet. This is the underlayment for those areas which are ...
Nice product this comes 18 inches by 50 feet. This is the underlayment for those areas which are prone to failures. Be sure to line up before applying to keep it straight which I always seem to have problems. I usually roll it out firt and line it up to make sure its straight. I don't like cutting and realigning unless i have to. Home Depot carries really nice products and this is really a good one.
by
  • Recommended
This roofing underlayment arrived on time and in good condition. The product has a peel away sti...
This roofing underlayment arrived on time and in good condition. The product has a peel away sticky back adhesive so it will stay in place on installation, and on the front has grid pattern to help align on sheathing. It also is of good weight and thickness. I haven’t yet installed it as I’m getting ready to reroof but it appears to be of very good quality and design and I’m looking forward to using it on my roofing project.
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  • Recommended
I had an area where three roof lines meet & I needed to ensure this wouldn't be a problem area. ...
I had an area where three roof lines meet & I needed to ensure this wouldn't be a problem area. I originally installed the GCP Ice & Water Shield, but I was having a hard time getting this product to conform to the roof lines as I intended. The Ice & Water Shield is only .007 inches thick & very sticky. Good for the intended application, but hard to use in this case. I found the Roofing Detail Membrane a much better product for this application. It is much thicker (.04 inches) & not quite as sticky so working it into a corner like this is much easier. It also has a bit of a memory so I worked it into the roof lines with a plastic putty knife and the backing paper still installed, pulled away from the roof, removed the paper, then reinstalled. Once the flashing is installed, I trust this will be a successful project.
by
  • Recommended
It doesn't get much easier than this. Grace Roof Detail Membrane is designed for waterproofing critical roof detail areas such as chimneys, dormers and skylights. It's basically an easy- to-use, self adhesive underlayment. It’s also perfect for areas of transition such as valleys, ridges, drip edges and rake edges. You can cut it with scissors. It is important to read the Installation Guide thoroughly as there are tip and tricks listed that will help you achieve a perfect installation. I'm using this product for a new skylight that I'm installing.
by
  • Recommended
Some sort of membrane down the 'valleys' of roofs where different angles of the roof meet is esse...
Some sort of membrane down the 'valleys' of roofs where different angles of the roof meet is essential and this GCP Applied Technologies membrane is excellent for the job. It's wide enough at 18 inches to fill the valleys and edges nicely. It has a backing you peel off so it self-adheres and rolls out without a lot of fussing. Best of all, it adds that all important extra layer of protection under the shingles to save endless headaches afterwards. This is a good, tough, easy to apply membrane that offers peace of mind on any roofing job.
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  • Recommended
Exactly what I needed
I made a little free library and needed something to seal under a cedar roof. This was it. It stuck to the wood sub roof and I was able to staple the miniature cedar pieces to it and through a severe storm everything stayed dry. Perfect.
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  • DIY
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4 people found this helpful
Lightwell roof repair.
Needed to install a drain in small lightwell area and used GraceRoof Underlayment membrane. Easy to work with in layers. I did two layers then used aluminum roof coating to finish the job. Only reason I didn't rate it 5 is I want to see how it handles rain after a year.
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  • DIY
  • Verified Purchase
  • Recommended
12 people found this helpful
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    Not 75' long
    I ordered this product two separate times online since my local store doesn't carry it. Both times I received 18" wide by 50' long rolls. I think this product is mislabeled as being 75' long when they actually mean it covers 75 square feet. When I brought this up a my local store they couldn't even find a product listed as 50' long even though that is what I was shipped twice.
    by
      Rating provided by a verified purchaser...
      Rating provided by a verified purchaser
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      • Verified Purchase
      Come on HD, hire someone that has better attention to detail to add products to your website
      GCP roof detail membrane on this page comes in a 75 lineal ft roll, not 75 sq ft as your website reads. 112 sq ft on roll. Why don't you hire someone with a better attention to details to correct the absolute thousands of mistakes and misleading product information on your website. And, by the way, no one cares about the size of the package the product comes in, but most of the time that is what is listed in the product specifications for size.
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        • Recommended
        1 person found this helpful
        Rating provided by a verified purchaser...
        Rating provided by a verified purchaser
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        • Verified Purchase
        Rating provided by a verified purchaser...
        Rating provided by a verified purchaser
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        • Verified Purchase
        Rating provided by a verified purchaser...
        Rating provided by a verified purchaser
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        • Verified Purchase
        This stuff is great!
        Peel, stick, and voila! This stuff goes on without a problem and prevents leaks. I love it!
        by
          • Recommended
          When it comes to peel and stick, this stuff is...
          When it comes to peel and stick, this stuff is the best! It’s especially good for waterproofing deck ledger boards.
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          • Verified Purchase
          Showing 1-30 of 67 reviews