Table of Contents
Overview
Grip-Rite SL154250LWE is a polypropylene synthetic roofing underlayment for mechanically attached roofing applications. The 48-inch by 250-foot roll covers 1,000 square feet.
This underlayment is designed to shed water beneath the primary roof system. Also, it supports secondary protection against leaks caused by wind-driven rain. It serves as a temporary cover and long-lasting secondary water-shedding layer.
The material uses a woven polypropylene substrate with textured surfaces. It does not include sound-control language related to mass, damping, absorption, isolation, STC, or NRC.
Key takeaways
- The roll measures 48 inches by 250 feet and covers 1,000 square feet.
- Tough woven polypropylene and high-tensile substrates resist tearing and blowoff from high-wind exposure.
- Textured top and bottom surfaces provide traction underfoot and against the roof deck.
- The material supports steep-slope roofing beneath several mechanically attached roof coverings.
- UV treatment covers exposure for up to 180 days.
- The roll weighs 19 pounds and rolls out flat for roof layout work.
What the product is designed to do
This synthetic roofing underlayment functions as a water-shedding layer beneath the primary roof system. Also, it is designed to reduce leaks caused by wind-driven rain penetrating that system.
The material supports steep-slope roofs beneath shingles, battened tiles, metal roofing, slate, wood shake, and wood shingles. In addition, it covers simulated slate and shake prepared roof coverings.
Its use centers on mechanically attached roofing applications. For another installation-focused example, this peel-and-stick roof membrane guide covers a different roof membrane format.
The 10-square roll supports broad roof coverage from one roll. Also, the roll size reduces waste and costly labor.
Materials, dimensions, and technical details
The underlayment uses a woven 8-by-8 scrim polypropylene substrate. Also, a non-skid polypropylene walking surface coats the substrate.
| Detail | Technical information |
|---|---|
| Model | SL154250LWE |
| Material | Polypropylene |
| Construction | Woven 8-by-8 scrim polypropylene substrate |
| Roll dimensions | 48 inches by 250 feet |
| Coverage | 10 square, or 1,000 square feet |
| Roll weight | 19 pounds |
| Surface | Non-skid polypropylene walking surface |
| Surface texture | Textured top and bottom |
| UV treatment | Up to 180 days |
| Colors | White and gray |
| Shape | Rectangular |
The material is nearly five times lighter than number 15 felt. In addition, one roll offers 2.3 times more coverage than number 15 felt.
Installation and placement notes
The underlayment fits mechanically attached roofing applications on steep-slope roofs. Also, it sits beneath shingles, tiles, metal roofing, slate, and wood roof coverings.
Both surfaces use texture to increase friction. As a result, the top supports traction underfoot while the bottom grips the roof deck.
The evenly rewound 48-inch roofing roll rolls out flat. In addition, the surface holds a chalk line during layout.
The product uses a non-skid walking surface for roof placement. Next, installers can align the broad roll across the roof deck.
A related roofing underlayment guide covers another underlayment installation context.
Performance characteristics described
The woven polypropylene construction uses high-tensile substrates. Also, these substrates resist tearing and blowoff from high-wind exposure.
The underlayment is lighter, stronger, and more energy efficient than felt. In addition, its 10-square format supports broad coverage while reducing waste and labor.
UV treatment supports exposure for up to 180 days. Also, the material serves as a durable temporary cover and secondary water-shedding layer.
The underlayment acts as an alternative to ASTM D226 Type I or II asphalt felts. It also serves as an alternative to ASTM D4869 Type IV asphalt felt.
The woven polypropylene underlayment addresses water shedding rather than acoustic control. No sound-related performance wording applies to airborne noise, impact noise, vibration damping, or sound absorption.
Review patterns buyers commonly mention
Buyers commonly identify the material as underlayment. Also, repeated feedback focuses on the material working as directed and doing its intended job.
General quality wording also appears across buyer feedback. However, those patterns do not establish soundproofing, sound absorption, or vibration-control performance.
Pros
- The roll covers 1,000 square feet while weighing 19 pounds.
- High-tensile polypropylene resists tearing and blowoff from high-wind exposure.
- Textured surfaces provide traction underfoot and against the roof deck.
- The roll lies flat and holds a chalk line during layout.
- UV treatment supports exposure for up to 180 days.
Cons
- The intended use centers on mechanically attached roofing applications.
- The material addresses water shedding rather than sound absorption, damping, isolation, or decoupling.
- The product dimensions require handling a 48-inch-wide, 250-foot roll.
FAQ
What is this underlayment made from?
It uses tough woven polypropylene. Also, the construction includes an 8-by-8 scrim substrate with a non-skid polypropylene surface.
How much roof area does one roll cover?
One 10-square underlayment roll covers 1,000 square feet. It measures 48 inches wide and 250 feet long.
Which roofing materials can go over it?
It supports shingles, battened tiles, metal roofing, slate, wood shake, wood shingles, and simulated slate or shake coverings.
Does it provide traction during installation?
Both surfaces use texture to provide traction. Also, the top supports footing while the bottom contacts the roof deck.
How long does the UV treatment cover exposure?
The material carries UV treatment for up to 180 days. It also serves as a durable temporary roof cover.
Does this material control sound?
The product text focuses on water shedding, traction, tear resistance, and roof placement. It does not assign acoustic performance to the material.