Width |
Length |
Contents |
Weight/Roll |
Rolls/Pallet |
Thickness |
|---|---|---|---|---|---|
48" |
250' |
1000 sqft |
31 lbs |
36 |
16 mils |
Width: 48" Length: 250' Contents: 1000 sqft Weight/Roll: 31 lbs Rolls/Pallet: 36 Thickness: 16 mils
All-Pro Underlayment
Gridiron Pro is a high-performance synthetic roofing underlayment engineered for sloped roofing systems where durability, control, and long-term protection matter. Designed as a secondary weather barrier, Gridiron Pro is designed for installation on roof slopes of 2:12 and greater, over solid roof decking such as plywood or OSB.
Gridiron Pro is made with cutting edge manufacturing technology and delivers superior dimensional stability and consistent performance you can count on. It is suitable for residential and commercial applications beneath asphalt and synthetic shingles, metal roofing, tiles, slate, and cedar shakes.
No Cleats Required
Gridiron Pro has a grippy underside coating that helps the sheet stay flat and secure under foot. On top, a thick and durable spunbonded polypropylene surface provides high-friction grip in all directions. No cleats required. This robust construction means it doesn’t stretch around fasteners, and it holds up as bundles of shingles are dragged and moved across the surface.
Spunbond
Walking Surface
180 Days UV
Resistance*
Limited**
Lifetime Warranty
Spunbond
Walking Surface
180 Days UV
Resistance*
Limited**
Lifetime Warranty
All-Pro Underlayment
Gridiron Pro is a high-performance synthetic roofing underlayment engineered for sloped roofing systems where durability, control, and long-term protection matter. Designed as a secondary weather barrier, Gridiron Pro is designed for installation on roof slopes of 2:12 and greater, over solid roof decking such as plywood or OSB.
Gridiron Pro is made with cutting edge manufacturing technology and delivers superior dimensional stability and consistent performance you can count on. It is suitable for residential and commercial applications beneath asphalt and synthetic shingles, metal roofing, tiles, slate, and cedar shakes.
No Cleats Required
Gridiron Pro has a grippy underside coating that helps the sheet stay flat and secure under foot. On top, a thick and durable spunbonded polypropylene surface provides high-friction grip in all directions. No cleats required. This robust construction means it doesn’t stretch around fasteners, and it holds up as bundles of shingles are dragged and moved across the surface.
180 Days UV Protection
Engineered for jobsite flexibility, Gridiron Pro is rated for up to 180 days of UV exposure prior to degradation. For optimal system performance, installation of the primary roofing material is recommended within this exposure window.
Important Design Notice
Built for modern roof assemblies, Gridiron Pro functions as a non-permeable air, vapor, and water barrier. As a low-permeance underlayment, it must be installed above a properly ventilated space to manage moisture and condensation risk. In situations where a breathable roofing underlayment is required, please see our alternate product, Breathex Pro.
*180 day UV resistance is based on testing conducted under controlled laboratory conditions. Gridiron Pro should be covered by a primary roof covering as soon as possible and no more than 180 days after installation.
**Lifetime refers to the length of warranty coverage provided and means as long as the original individual owner(s) of a single-family detached residence owns the property where the qualifying product is installed. For other owners/structures, Lifetime coverage is not applicable. See HAL Industries’s Limited Warranty at halind.com for complete coverage and restrictions.
***Installation temperature depends on proper storage procedures being followed.
| Tensile Strength | Value | Test Method | |
|---|---|---|---|
| Machine Direction | 123 lb | ASTM D5034 | |
| Cross Direction | 117 lb | ASTM D5034 | |
| Tear Strength | |||
| Machine Direction | 34 lb | ASTM D4533 | |
| Cross Direction | 32 lb | ASTM D4533 | |
| Resistance | |||
| Water | Pass | ASTM D4869 | |
| UV | 6 months | ASTM G154 | |
| Conformance | |||
| Meets or exceeds | ASTM D8257 | ||
| Meets or exceeds | ASTM D226, CSA A123.3 | ||
| Flexibility | |||
| Installation Temperature Range*** | -17°C to 60°C (0°F to 140°F) | ||
*180 day UV resistance is based on testing conducted under controlled laboratory conditions. Gridiron Pro should be covered by a primary roof covering as soon as possible and no more than 180 days after installation.
**Lifetime refers to the length of warranty coverage provided and means as long as the original individual owner(s) of a single-family detached residence owns the property where the qualifying product is installed. For other owners/structures, Lifetime coverage is not applicable. See HAL Industries’s Limited Warranty at halind.com for complete coverage and restrictions.
***Installation temperature depends on proper storage procedures being followed.
GRIDIRON Pro
Installation guide + Specifications
Gridiron Pro Spec Sheet & Installation Guide
Gridiron Pro Installation Guide