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

I like the 4' x 250' roll for the job I'm doing. My coverage area is 17'x76' with a single gable ridge. Two rolls was sufficient enough with plenty leftover for future small projects. It could have been a little thicker material though. It's very comparable to tyvek. All in all it's a very robust water barrier. I Definitely recommend this product.

I have used Rex Synthetic and Triflex 30, both are good products. I like Rex because it is a lighter color and does not get hot in the sun like the black Triflex. I installed Triflex in the heat of the day and found that it had shrink the next day when it was cool in the morning and was pulling on the staples. It seemed that thew Triflex had a tendency to curl up on the edges when I was installing it and made it difficult to line up the edge of one piece on the line of the one below it for some reason. Triflex is easier to purchase than Rex in my area so that's why I used it. I also wish that they made these product with lines on them like felt paper has, it makes it easier to line up the shingles as you run them. People say that the cost is not that much more than felt paper. By my calculations with 15# felt @ $17 /roll (432 sq ft) and Triflex @ $112 (1000 sq ft), felt is 3.9 cents / sq ft and Triflex is 12.2 cents / sq ft. Triflex is 3 times more expensive than felt. For a 10 sq roof it will cost you $112 for Triflex and felt will cost $39. For a $70 difference I might see this as an area to shave costs, but its advantages over felt paper make me think again, especially if rain is in the forecast and I can't get it shingled in time.

This product performed as advertised. Very easy to use, did not wrinkle and was very light. I highly recommend as replacement paper for #30 felt.

This stuff is great! Won't rip or tear, and you can't cut it with a utility knife. But it zip-cuts like butter with scissors. It is really tough - I installed it during high winds, and was able to keep it under control without damage. I stapled the edges and they held under the high wind. Good traction on sloped surfaces. And it is surprisingly light weight for the strength.

I had a leaky roof on my house before the hurricanes of 2012 hit. I didn't have the time or money to do a new shingle job so I decided to give this product a try. Even though I had to put the last of it on in high winds it was still manageable and never tore once. If I had tried that with tar paper it would have been in shreds. I would recommend the metal caped nails though. The one's with the plastic washers start out well but the sun will ruin them long before the Grace reaches it's maximum exposure time. I also recommend that when you think you have bought enough nails to buy two more boxes. I finished my roof with exactly one nail left. Now if someone would invent a light weight replacement for 90lb rolled roofing.

What a great product! Would never use Tar Paper again. Easy to use, cut, carry and install. One tremendous advantage is that you can "push" it into areas with a putty knife, etc... if you need to tie it into existing shingles, etc..without risk of cutting or damaging it. It is that strong and durable. In my area, it is priced at $95 a roll, then my credit card gives another 10% back. In the end, it is the same price of 5 rolls of tar paper, which is what one roll of this stuff yields. What a great product. You will not be disappointed. Finally, the mfg mentions that it can stay exposed for up to six months to the elements. This is great if you are doing your own shingling. This product allows you to work at your own pace over a period of time, while still providing watertight protection.

Triflex is easy to install and stands up to the weather. The only negative characteristic I have found out by using it. If part of the sheeting is NOT tack down it will shrink about 5%. When tacked down in the sun heat any wrinkles will soon disappear (which is nice) if the job left open to the weather a week. My problem actually is with another product I used to tack the Triflex down the round plastic cap roofing nail made by “Grip Rite” The plastic part broken down and flaked away leaving just small nail head (they must of used biodegradable plastic in manufacturing) I guess the lesion here to get it cover when conveniently possible. I will say the Triflex does by you open time to get the job done but I have push it to its limits of more than 6 months open to the weather.

This product is 10 times better than felt papper. It is a breeze to install.

Strong, light weight, over lap and nailing pattern marked clearly on the product. It heat shrinks to get rid of folds which helps it shed water but will pull staples and reduce overlap if not nailed down properly and quickly (same day). A great product for the Do It Yourselfer who takes their time doing the project.

we had 60+mph gusts and horible storms out hear on the jersey coast and not one damp board this stuff works and works incredably well also it is almost the same price as traditional 30lb felt per sq foot

Light weight but strong. Good coverage but it can be difficult to cut (need a very sharp razor knife).

this product is extremely easy to install and appears to be as durable as advertised. it was also shipped quite promptly. thank you, home depot!

I used three rolls for tear-off and re-roof at the north Oregon coast. The material rolls out easily but is best installed with two people to keep the wind from being a factor. When the sun heats the material in the afternoon, it becomes slippery and material slides too easily. It does shed any rain very well. It's very tough so have a sharp blade in your cutter when making cuts.

I purchased this simply to buy time re-roofing a rather large house project myself. Normal felt underlayment would tear off and degrade in the weather quickly (if left exposed), but with this, I was able to roof my house over a few months’ time - in fact it took 8 months without any worries. Yes a bit more expensive, but considering doing the job yourself ,it’s worth the extra price for this reason. Used plastic cap roofing nails (about 1-1/4” diameter) to keep it down.

Quickly delivery on time. The product meet all specifications. Good work.

I saw this while looking at roofing supplies online. I've used other Grace products in the past and like their quality. I'm replacing my roof and I wanted to be able to put down underlayment that would hold up to the elements for a month or two before I started laying down shingles. I've got to replace a lot of the sheathing on the roof deck before the rental on my dumpster runs out so the actual shingle installation will have to wait until I've finished the deck repairs. Tar paper will rip right off the roof in a stiff wind so when I saw this stuff I figured it was worth a shot based on other customer feedback. So far I have not been disappointed. It does require the use of button cap nails which takes longer to install, but I'm not complaining. My old roof was slicker than snot from all of the granules coming loose off the old shingles. Once I stripped off the old shingles and tar paper and used my leaf blower to clear off the debris I was able to install the Tri-Flex with no problem. I like that it's in 4-ft wide rolls vs. 3-ft so it does help offset the install time since you need fewer rows. Once nailed down, it provides a good gripping surface to walk on. It's got a tacky feel for a secure grip. I couldn't sit on my bare roof in my jeans without sliding or firmly planting a foot on the roof deck. With the Tri-Flex I have no problem sitting, standing, or walking without the need for special roofing footwear.

Light weight, installs faster and easier than felt. I will never buy roofing felt again.

The best product to use for underlayment below shingles (except Ice & Water Shield). Much less expensive and easier to install than Ice & Water Shield. One person can easily roll out and tack down this product even in breezy conditions. The 4' width means less courses needed to install.

I live in Oklahoma and am reroofing my garage by myself. There is no way 1 person could put 30# felt on by themself in this wind, with TriFlex It was no problem. If you figure the price for 30# and compare it to TriFlex it is not that much difference. I will recommend this product every chance I get

Tri-Flex is by far the best roofing underlayment I have ever used! It lays flat and will not wrinkle or buckle in wet or dry conditions. It is a lot safer to walk on and won't tear from fasteners. Paying a little extra for Tri-flex is worth it because it gives me the peace of mind knowing that I have secondary protection to help prevent leaks if water penetrates my primary roof covering.

Great Underlayment. It is light, easy to use and very strong unit but very expensive.

best stuff i ever used. just covered my hole roof 30square easy to roll down lays flat on vallys and caps.

Light weight and almost bullet proof, will last longer than I will and shipping was great. Been here before with same care and quality.

High on price But you get the best. A++++++++++++++++

I don't think I will ever use black paper again. Grace Triflex is light, strong, and easy to install. Best underlayment I have ever used.

I saw this on the web site and thought I would give it a try.I was very impressed when I opened and examined the material.It's like a waterproof house wrap with a rubbery texter,and very lite.I have had a lot of problems with moisture in the past,but with this in place of felt paper,I know there won't been any further moisture problems.I recommend it to all my friends.

Good stuff. It's been on my roof for two weeks now unprotected by shingles and has shown no signs of leakage or tearing. If this was roof felt, half of it would have blown off by now. This allowed me the time to get a roofer to quote doing the shingles and trim while protecting my new frame structure from the weather. I was delighted by the amount of traction you get on this material, even when it is wet.

this product was very easy to install and appears to be completely water proof.

tear-resistant, abrasion-resistant, cuts easily with scissors or utility knife, comes pre-printed with sidelap spacing guidelines and nail-spacing marks. also much lighter per area of coverage than conventional 30# felt, relatively easy to haul a 28# roll covering 10 squares, up a one-story ladder. costs a lot more than 30# felt, but worth it in my opinion.