- 20 times stronger than felt
- Installation is fast and easy
- Used with all major roof coverings
- View More Details
How to Get It
Product Overview
Grace Tri-Flex synthetic, water-shedding roofing underlayment overcomes the shortcomings of #30 felt. It delivers advanced benefits that save the contractor time and labor. Grace Tri-Flex roofing underlayment is mechanically attached, and may be used in conjunction with Grace fully-adhered underlayments or alone.
- More coverage per roll: Five times more coverage per roll compared to #30 felt enables increased efficiency, and labor savings
- Durable: 6 month exposure time allows to temporarily dry in structures and enables flexible construction schedules
- Lighter weight than #30 felt: Provides fast and easy installation, allowing time and labor savings
- 20 times stronger than #30 felt: Can withstand higher wind conditions, preventing costly reworks
- Versatility: Can be used under all major roof coverings
- Grace expertise: Developed by the recognized leader in self-adhered roofing underlayment's and the manufacturer of grace ice & water shield
Compare Similar Roof Underlayments
 |  |  |  | |
| Brand | Grace | GCP Applied Technologies | GCP Applied Technologies | GCP Applied Technologies |
| Name | Tri-Flex 48 in. x 250 ft. Synthetic Roll Roofing Underlayment | Grace Select 36 in. x 65 ft. Roll Self Adhered Roofing Underlayment (195 sq. ft.) | 48 in. x 250 ft. Tri-Flex 15 Roll Synthetic Roofing Underlayment | Tri-Flex XT 48 in. x 250 ft. Black Synthetic Roll Roofing Underlayment |
| Price | $11313 | $11605 | $12400 | $21714 |
| Ratings | (89) | (66) | (19) | (56) |
| Unrolled length (ft.) | 250 | 65 | 250 | 250 |
| Product Width (in.) | 48 | 36 in | 48 in | 48 in |
| Product Thickness (in.) | .04 in | 0.0251969 in | 0.007 in | .04 in |
| Material | Synthetic Fiber | Asphalt | Resin | Synthetic Fiber |
| Coverage Area (sq. ft.) | 1000 | 195 ft² | 1000 ft² | 1000 ft² |
| Underlayment/Barrier Type | Peel & Stick Underlayment | Synthetic Underlayment | Synthetic Underlayment | |
| Application Method | Peel & Stick | Nail | Nail | |
| Features | High Wind Resistant,Water Resistant | No Additional Features | Extreme Heat,High Wind Resistant | |
| Fire Rating (UL 790) | Class A | Class A | Class A | |
| Surface Recommended | Concrete Roofs,Metal,Wood | Wood | Concrete Roofs,Metal,Wood | |
| View Product | View Product | View Product | View Product |
Specifications
Dimensions
| Coverage Area (sq. ft.) | 1000 | Product Thickness (in.) | .04 in |
|---|---|---|---|
| Product Width (in.) | 48 | Unrolled length (ft.) | 250 |
Details
| Color Family | Black | Material | Synthetic Fiber |
|---|---|---|---|
| Product Weight (lb.) | 28 lb | Returnable | 90-Day |
| Roofing Product Type | Underlayment | Texture | Smooth |
Warranty / Certifications
| Manufacturer Warranty | go to www.grace.com for info |
|---|
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
Sep 27, 2015
Great Underlayment for a Metal Roof
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!
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Nov 4, 2014
Great product for Washington winter
This roofing product will be a big boost for the upcoming winter here in western Washington.
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Aug 28, 2014
Gret product
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.
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Jul 15, 2014
Great product
Light weight and easy to use. Super strong material. Left out in weather not a drop of water came through. Great product.
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Jun 25, 2014
Strong and Durable!
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!
by
Oct 15, 2013
Lightweight, durable, easy to install.
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.
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Oct 19, 2012
Excellent underlayment. Much better than felt. Easier for DIY, too.
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.
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Nov 13, 2016
This stuff is great! Rather disappointed that it has been discontinued. I've had this exposed on ...
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!
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Sep 20, 2016
Just expensive tar paper, returned to get ICE Shield instead.
Just expensive tar paper, returned to get ICE Shield instead.
Note : the weight of roofing products is not described on web page.
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Aug 19, 2016
PROBLEMS WITH PRODUCT. Product shrinks when sun hits it or hot. It lifts out of the valleys.
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.
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