Rated 4.4 out of 5 by 53
Rated 5.0 out of 5.0 by Vard Excellent Product
This product REALLY seals and keeps the water out. It adheres to the sheathing - no nails required, and self-seals any nail holes created by shingling or any other activity. The only drawback is that it is a little awkward to install in large sheets, because the material is floppy and wants to stick immediately to anything as soon as the backing paper is removed. For this reason the directions suggest about 15 feet as the maximum length piece to work with. On the other hand, it can be shaped around almost anything, and cut into smaller pieces for patching around obstacles. Because it bonds to itself so well, you can even install it vertically and cut patch pieces to fix small "oops" locations.
It is somewhat expensive, but in the context of an entire roofing job, maybe 10% of the whole cost. But why scrimp on materials when you want a roof that will be trouble-free for at least 20 years?
All-in-all, a truly great product. I won't use anything else.
October 18, 2016
Rated 2.0 out of 5.0 by Jack Ice and water shield
Rip cord was a help but the paper edge would often tear off and I would have to lift up the side and try to grab the center rip cord edge to continue the lay down. At that point a wrinkle would occur. You have to be very patient or you will find yourself throwing large waded pieces off the roof. I found the Owens Corning product with the two separate plastic sheets far superior but the adhesive not as good as the Grace product
September 23, 2016
Rated 3.0 out of 5.0 by Ruralman Sticky stuff
It's a good product if you can lay it out flat and straight. I had a difficult time trying to lay it out without wrinkles and sticking to it self.
September 27, 2016
Rated 5.0 out of 5.0 by Rachel Great product
This is easy to install and works beautifully to make my very flat roof water tight. Great product.
August 16, 2016
Rated 4.0 out of 5.0 by DoodnOregon Spendy but inspires confidence
I used this underlayment on a low sloping roof in a windy rainy and sometimes icy climate. The sheeting was also a little rougher than I'd like. This material is almost like a thick rubber than bridged the small gaps and softened the edges. It helped a lot to have a partner to help roll it. It is VERY sticky and could turn into a mess quickly!
August 11, 2016
Rated 1.0 out of 5.0 by Fred Waste of time and money
The backing does not release, it tears in random strips. The adhesive on the backside edges will mess up the handling. The temperature should be below freezing when applied unless you want a giant mess.
July 16, 2016
Rated 1.0 out of 5.0 by Mgoriganti Unfriendly, Designed to sell more, not help DIY home owners.
Most unfrinfdly product, designed for contractors profits, not for reasonably skillful DIY person and to sell more with a lot of wastage as one ties to use it, For what it is worth Corning product is way better, no wonder why stores promote sales of Grace not Corning.
July 24, 2016
Rated 5.0 out of 5.0 by BD Best on the Market!
I have bee using this for as long as I can remember, it may cost a bit more that other brands, but your home is worth the extra! Shed style roofs, just do the whole thing, other roofs I use 6ft eve
November 10, 2015