Proper Roof Underlayment Installation

Appropriate personal safety equipment and work.

Proper roof underlayment installation.

Observe and comply with all osha and other safety standards and codes that apply to roof safety. Fall protection devices should always be used when working on roofs. If it gets wet it will wrinkle making it harder to shingle. How to install roofing underlayment the proper way.

For vaulted or cathedral roof construction provide a free ventilation path from eaves to ridge between all rafters. Subscribe and share please. There are two easy ways to install self adhering roofing underlayments correctly. If you lay the felt perfectly straight you can use its lines instead of horizontal chalklines to align the shingles.

Do not use felt as a temporary protection against rain. It starts with installing solid decking usually plywood or oriented strand board but that is not waterproof. Roof underlayment prevents the roof deck from being exposed to the elements before or while the roofing material is being installed. Install baffles providing a minimum of 1 inch of clear space between framing and or under roof decking at eaves to ensure that ceiling or roof insulation does not block ventilation paths.

Cut the membrane into 10 to 15 foot lengths and re roll loosely. Synthetic roofing underlayment installation guidelines and safety precautions. Here is a video about roofing underlayment. However while a self adhered underlayment is a significant leg up against harsh conditions if it is not properly installed the roof is still vulnerable to leaks.

Check this out. Underlayment flashings and shingles all work together and must be installed in the correct order.