CertainTeed Roof Runner Synthetic Underlayment

The CertainTeed Roof Runner is a synthetic polymer-based underlayment that is reinforced with gauze and is water-resistant. This underlayment layer is meant to be placed beneath asphalt roofing shingles. Compared to standard asphalt felt underlayment when wet, Roof Runner has remarkable dimensional stability that eliminates the possibility of moisture-related expansion wrinkles. The standard asphalt felt underlayment can cause distasteful wrinkles on the finished roof, because it can become very wrinkled when it picks up moisture. The wrinkles can then sometimes transfer through the shingles applied over it. Roof Runner has an extra-large length and width for a speedy application, and it has a special top surface treatment that provides superb slip resistance, even when it is wet.

Order Processing: After your payment is authorized and verified, we will start processing your order and this process can take from 1 to 2 business days, so please be patient with us. If we are unable to process your order due to inaccurate or incomplete payment or incorrect address information, your order processing may be delayed.

Carrier: UPS/FedEx/USPS. Delivery Timescale: More than 90% of orders arrive in 10 business days after despatch.

FREE RETURNS on all orders!
The following conditions must be met:

1. Items must be returned within 30 days after the purchase date.
2. Items must be unworn, undamaged and in original packaging.