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Model #5003228

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

$11710
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  • Slip Resistant
  • Seals around nails
  • Will not Crack or Dry out
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Product Details

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)
  • Return Policy
  • California residents

Additional Resources

From the Manufacturer

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Specifications

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Questions & Answers

36Questions
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Q:will it work on a manufactured home
by|Dec 31, 2022
0 Answer
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Q:Can this be used to seal a flat roof on garage and then covered with liquid rubber
by|Sep 30, 2022
1 Answer
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A:  I would not.. the material is thin and designed to seal up nails and such when shingles are applied.. I would use a thicker material like a flat roof membrane

by|Oct 2, 2022
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    Q:I plan to use this for flashing behind a deck ledger. I will not use the entire roll. Can the r...
    by|Jun 12, 2020
    2 Answers
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    A:  Yes, this is a high quality product and you should be fine using the remainder as joist tape.

    by|Jun 23, 2020

    A:  Kevin, Because the structural integrity of your deck will depend in no small part on the health of the ledger over time I used this product OVER the ledger. Not only that, I used pressure treated ground contact Doug Fir for the ledger. I attached it to the house with galvanized 5/8" bolts and/or threaded rods with the same 1-1/2" Doug Fir plates spanning perpendicular across the wall studs on the INSIDE of the house and then installed the washers and nuts. Back on the outside, I then started the Grace flashing about 4" above the ledger coming down the wall, over and down the face of the ledger, back to the wall, then down the wall another 4". After all the joists were installed I installed aluminum flashing on the wall above the deck which overlapped that 4" Grace Flashing. My idea was to never have the ledger see a single drop of water. It's been three years and it to date it hasn't. I seriously doubt it ever will. As for using the remainder for joint tape, I don't know what joints you're refering to, but if the purpose is to keep water from entering the ends of lumber, it's a good idea. I also used Copper Green Wood preservative on every joint and in ever bolt hole I drilled. I also placed self-adhesive aluminum tape across the the top edge of every joist. I wanted this to be a once in two life times installation. So far it looks like it will last at least that long. ;-) Good Luck.

    by|Dec 20, 2022
    3 found this answer helpful
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    Q:Is it ok to use a Vinyl roll as back flashing on top of GCP roof detail membrane? I am thinking: ...
    by|May 14, 2020
    1 Answer
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    A:  May 16, 2020 Hi Gary, I am not familiar with this product, but I took the time to visit the link you included above. You have probably read Ken's experience which I have copied below. It sounds to me that if you are adding this product on top of the Grace detail membrane for aesthetic reasons - (i.e., because it's white and visible and hides the black of the Grace membrane) - and it's "trapped" by being subsequently covered by the rim board you'd be OK. That said, it sounds brittle and apparently does not hold a formed (bent) shape well on its own. As far as water protection alone is concerned, the Grace membrane would be sufficient. If water protection is your only concern I wouldn't bother adding it. The Grace membrane is sufficient for that purpose. I used it three years ago and I am noticing not one bit of degradation. The Grace membrane has a thick rubbery self-adhesive backing which closes around screws (or nail, but I don't use nails). This product clearly does not, so it's going to have tiny little leakage points everywhere it's penetrated by a screw or nail. If it's a second layer for the aesthetics of being white, sure use it. If you're thinking of adding it as a second layer primarily for additional water protection only I wouldn't bother with the expense (or hassle of installation). I hope this helps. February 4, 2020 My experience with using this product was very negative. I only needed a small amount, several feet worth, and the smallest size available was 30 feet, far more than needed (and extra costly). In needing to make sharp bends with it, I was unable to do so and found it "floppy" and when adhered to its intended location, I found it "wavy" and unattractive for its purpose. I ended up ripping it down, and am stuck with about 26' of it. I learned the hard way, and had I seen such a review as this, I'd have spared myself the time and frustration. I ended up using 3/8" PVC board as a far better alternative. Ken

    by|May 17, 2020
      Showing 1-4 of 36
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      Customer Reviews

      4.4 out of 5
      (72)
      • 4.4
        out of 72 reviews
      • 92%recommend this product
      Filter by:
      Showing 1-10 of 72 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 found this review 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 found this review 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 found this review 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.
      by
      • 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.
      by
      • Recommended
      1 found this review 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.
      by
      • Recommended
      Showing 1-10 of 72 reviews

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      Ratings
      (72)
      (56)
      (82)
      (279)
      Underlayment/Barrier TypePeel & Stick UnderlaymentSynthetic UnderlaymentSynthetic UnderlaymentPeel & Stick Underlayment
      Application MethodPeel & StickNailPeel & StickPeel & Stick
      FeaturesNo Additional FeaturesExtreme Heat,High Wind ResistantNo Additional FeaturesNo Additional Features
      Unrolled length (ft.)752507575
      Product Thickness (in.).04 in.04 in.007 in.04 in
      Product Width (in.)18 in48 in36 in36 in
      Fire Rating (UL 790)Class AClass AClass AClass A
      MaterialAsphaltSynthetic FiberResinAsphalt
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