Certainteed RoofRunner® Synthetic Roofing Underlayment, 4 ft. x 250 ft.
This specialized roofing accessory is made with high-quality materials and features a unique design that provides exceptional resistance to water, wind, and other environmental factors.
RoofRunner is a synthetic polymer-based scrim-reinforced underlayment that is designed for use on roof decks as a water-resistant layer beneath asphalt roofing shingles on residential roofs. It is made with a blend of which give it a weather-resistant surface that can withstand the elements. The underlayment is also designed to be lightweight and easy to handle, making it an ideal choice for roofing contractors.
- Performance - A CertainTeed Integrity Roof System combines key elements that help ensure you have a well-built roof for long-lasting performance.
- Protection - Self-adhering underlayment is installed at vulnerable areas of your roof to help prevent leaks from wind-driven rain and ice dams. Warranty - RoofRunner is used in conjunction with a CertainTeed roofing product, RoofRunner will take on the same warranty period as the shingle above it.
- Protection - Self-adhering underlayment is installed at vulnerable areas of your roof to help prevent leaks from wind-driven rain and ice dams.
- Warranty - RoofRunner is used in conjunction with a CertainTeed roofing product, RoofRunner will take on the same warranty period as the shingle above it
| Type | Roof Underlayment |
|---|---|
| Thickness | 7 mil |
| Width | 4 ft. |
| Length | 250 ft. |
| Coverage | 937.5 sq. ft. |
| Brand | CertainTeed |
| Series/Sub-Brand | RoofRunner |
| Material | Synthetic |
| Weight | 23 lbs. |
| Manufacturer Code | 404987 |
Product Composition: RoofRunner roofing underlayment is based on a tough woven polyolefin
reinforcement laminated between layers of specially formulated UV-stabilized polymer films.
INSTALLATION
Deck Preparation: Provide a clean, dry and smooth deck surface by eliminating dust, dirt, loose nails and other objects. Before application to existing roofs, remove all roofing materials, and then clean the roof deck until it is free of any dirt, dust, nails, and other materials.
Standard-Slope Application Only (4:12 and Greater): Starting at the lower edge of the roof, cover the entire deck by applying a single layer of RoofRunner parallel to the eaves, with printed side facing up. When necessary, overlap all ends (vertical laps) at least 6 in. and “weather-lap” all sides (horizontal laps) at least 3 in. Offset adjacent end laps by at least 6 feet. Apply flat and unwrinkled, carefully fastening as described below to hold in place.
Low Slope Application (2:12 to <4:12 Slopes): The use of CertainTeed WinterGuard® Waterproofing Shingle Underlayment, or its equivalent,* applied over the entire deck surface is required. * For low slopes, underlayment equivalents to WinterGuard include:
1) waterproofing shingle underlayments meeting ASTM D1970;
2) in areas not prone to snow or ice, two layers of CertainTeed RoofRunner in shingle fashion (half lap) per the low-slope application instructions below:
Low slope application instructions for RoofRunner double coverage in shingle‐fashion:
• Install a full 25.5 in. starter strip along the eaves
• Install a full 48 in. wide sheet over the starter strip
• Apply each succeeding 48 in. wide courses up the roof overlapping each previous course a maximum of 22.5 in. exposure (or 25.5 in. overlap) in traditional “half-lap” installation or in “shingle fashion”.
• Overlap 12 in. at all end lap seams and offset from adjacent end laps by at least 6 feet.
Exposure Limitations: RoofRunner is not designed to be permanently exposed to sunlight and weather or used as a waterproofing underlayment. RoofRunner is tested for UV resistance for up to 90 days; do not expose it for more than 3 months prior to installing finished roofing.
Fastening: DO NOT USE STAPLES or roofing nails! Cap nails with 1 in. heads are required for installation,
they can be either pneumatically driven or hand applied. Correct nailing locations are clearly indicated by
the circular targets printed on the top surface. Otherwise, refer to local applicable building codes for
required fastener type and fastener spacing in high wind zones.
Proper fastener spacing is 15 in. On-Center (O.C.) vertically and 12 in. O.C. horizontally (parallel to eaves).
On vertical side/end laps install 8 fasteners equally spaced at 6 in. O.C. centered in the lap to hold the
underlayment in place.