Customer Reviews for Grace Tri-Flex 48 in. x 250 ft. Synthetic Roll Roofing Underlayment

Bought this to cover up 30 lb Felt that was beat up by our Montana Winds in just 1 weeks time exposure, After getting the tar paper back down & secured I decided to spend the money & place this product up over the tar paper on my Shed/Out Building. It took about a week to arrive having it shipped to home. This stuff is OUTSTANDING! Wow! 1st off it doesn't tear very easily... 2nd it has a tackiness that is a comfort while working 12-15 feet up with no harnesses or Nets! LoL... It went on very easy & had marked lines for lining up & securing Properly to the roof deck. Used 1 inch roof nails from Home Depot to tack it down. It has held up Magnificently to the Montana Winds & a Few Micro Burst Storms Too! Sheds the water so Well & Seals So well I almost want to use it Solely as the roofing material... Just saying I believe the 6 months exposure would be an easy Stretch for this material!

This roofing product will be a big boost for the upcoming winter here in western Washington.

Everything is tested to extreme temperatures and wind in Phoenix and this underlayment has passed. 20 times stronger than the cheap paper they normally use in house construction here. Was very easy to apply and the cost was very reasonable.

Light weight and easy to use. Super strong material. Left out in weather not a drop of water came through. Great product.

We are renovating an old 1920's farm house in Teton Valley Idaho. We have brutal long and cold winters. We are sticking to a tight budget and we needed to dry in the house for winter. The roof needed new sheeting and the budget did not allow for the actual roofing before winter. After reading reviews I chose to go with the Grace Tri-flex. Grace said that the product could be left exposed for up to six months. We installed the Tri-flex last October and just installed the Metal roof in June. It never leaked or tore even with our high winds and blizzards. Snow would never build up on the roof it would always slide right off. I would not recommend going as long as we did with it exposed as the plastic cap nails begin to get brittle in the sun. Don't try to go cheap and use staples, Tri-flex will shrink in the sun and pull out staples. It worked so well on the roof that I also used some of the left over Tri-flex to cover the gables where the siding was gone. Great product. Buy it!

I recievecd this shortly after ordering , but was delayed in installing. It is easy to store until needed. I was able to install by myself on 2 smaller roofs. I have yet to install on the main house, but the pitch of that roof will require assitance. It has been durable and did not require any adjustments thru a couple of rains after installation. I have used this on a previous site that withstood 80mph gusts back in the late spring. It is marked on the face for easy placement of fasteners.

If we ever re-roof again, we would definitely use this underlayment. Worth the extra few $ over using felt. Much easier to work with, more reliable when it rains & so much more durable. Love it! Also made a much smoother base for shingles.

This stuff is great! Rather disappointed that it has been discontinued. I've had this exposed on a kennel roof for almost 18 months without a tear or failure (haven't had time to shingle yet). Won't shingle over this due to the time exposed, but this underlayment is the best I've ever used. Used it on a 14' x 35' shed and had to put the last 2 courses on in a stiff 15+ mph breeze (try doing that with felt!). Good traction while shingling. It does tighten up with exposure, but that helps take wrinkles out that could impact shingle placement. Great underlayment!

Just expensive tar paper, returned to get ICE Shield instead. Note : the weight of roofing products is not described on web page.

I bought this because of the claim that is could stay uncovered up to six months. The listed problems occurred after a few days of alternating rainy and hot periods. 1st It didn't feel stable under foot as it was being laid. A problem when 20 feet up. It slides on the roof held only by stretching nail holes. I worry about leaks at nail holes because of stretching when you walk. 2nd When the product heated up it got real tight. -Enough so that is revealed seams in the rolls that pulled apart. 3rd This was the worst part. When it tightened up from the sun. It lifted out of the valleys. This required the product being cut and new felt being placed before shingling. Overall. I will not use this product again.

Works really well easy to install, excellent durability, much better than felt. A little slippery when wet, only complaint I wish it had more lines for shingle alignment.

After tearing off my old roofing and seeing how the felt paper was just crumbly apart I was so glad I bought the Grace Triflex underlayment . It is strong & lightweight & I won't be worried about it deteriating

This material is thin and light weight. Very easy to use. It doesn't stretch or crease easily. It's as easy to cut as paper. It seems to be as waterproof as advertised and it won't absorb water and wrinkle and buckle like tar paper. It's easy for a one man operation to cut a piece to the entire length of the roof, tack one end down and stretch it out across the whole roof without a massively heavy roll sliding down the roof. Lots of material on a roll.

Easier to install than felt. Tougher and more durable than felt. Lasts longer than felt - up to months before cover. Cheaper than felt. So why does anyone use felt? Well pleased.

Excellent as temporary roof covering. Has held up very well for more than 18 months while preparing to re-shingle.

Is an excellent underlayment I would use again if I were to build again

This is the best product I could find anywhere for the price for metal roof underlayment. Its water proof and UV resistant for up to 6 months.

I ordered 2 boxes; 2,000 sqf of advertised coverage area and found each box had 900 sqf of coverage leaving me with an unfinished roof. The material quality is good but I am very disappointed in the product shortage. I have a very simple, two sided roof with 1,890 sqf of area. The product left me approximately 90 sqf short of finishing my project.

Good product, just wish it were available through the local stores verse ordering online.

I have used several grace underlayment products and have liked them all. I would have given five stars had I not run out and bought a roll of Titanium 25plus from a local supplier because I needed it that day. The titanium has a few features that I like more than the Grace product. Firstly, the grace is not as grippy. Yes it has a woven texture, but it is a pretty high thread count and where the titanium has a coarse weave with an additional traction fiber woven in that makes you feel like spiderman. The other major thing is the color. Grace is black and black gets hot, making work unnecessarily hotter. The titanium is very light grey and shows sharpie marks better when laying out and measuring for steel panels. Even with these two gripes, still a very good product that I would trust over and over again.

Light weight rolls so I can easily install by myself. Tough and held up well. I like much better than the felt paper. I used staples to hold down and held fine while working on it. Good product in my opinion.

When compared to conventional tar paper underlayment this stuff is light, easy to use and much more durable. One roll covers about ten square instead of having to heave up numerous rolls of tar paper on the roof. It's much, much more tear resistant than tar paper and it's got good traction when dry. I have no doubt this stuff will do it's job longer and better than old school tar paper.

I like this underlayment because it is light weight, easy to secure to the deck, breathable, and can be exposed to the elements up to 4 months and still be ok. One roll is 10 sq as opposed to the 4 sq for 15 lb felt It is slightly more expensive than the 15 lb felt, but the time savings on installation is worth it to me.

Bought this online as I was not sure if any synthetic material would be at the store. This is much better than felt by a long shot. Ended up running out and had to make a mad dash to my local store to hopefully find some before the rain set in. My local store did not have this, but they did have some Grey synthetic underlayment from GAF called feltbuster. I actually like the GAF much better than the tri-flex. The GAF underlayment had a better grip and is much safer. Both of these are great, and much better than felt, but the grey GAF feltbuster is the best in my opinion.

Easy to roll out and apply. Not slippery to walk on. Very durable fabric. Love the product. Wouldn't use anything else. Wouldn't recommend anything else to anyone.

The product is very durable and easy to work with.

I will never ever go back to felt paper again !!! Went on easier, faster, smother, more durable and covers more area per pass with less area loss due to overlap.

Easy to roll out and fasten. Tough and gives great traction (after fastening) yet easy to cut and trim with a scissors. 100% waterproof. Super light weight. I assume it lasts a long time under shingles.

Strong, lightweight, water proof, will not rip and easy to apply. I'll never use felt again.

I used this under metal roofing. Roofing felt is not good under metal. I really liked the slip resistant surface.