Proper Installation Of Roof Underlayment

Fasten drip edge on eaves with.

Proper installation of roof underlayment.

Nail metal drip edge flashing which bends over the roof and down the edge of the facing board on all roof edges. Synthetic underlayment must be installed above properly ventilated attic spaces follow local building code as it is. The best time for installing roof underlayment is when the temperature is between 40 to 85 degrees fahrenheit. Start by laying asphalt felt or other underlayment over the roof.

If you live in an area with inclement weather you should consider using a special ice and water protector. Synthetic roofing underlayment is to be laid horizontally parallel to. How to install roofing underlayment the proper way. Align the membrane and roll in.

Roof underlayment prevents the roof deck from being exposed to the elements before or while the roofing material is being installed. Underlayment flashings and shingles all work together and must be installed in the correct order. It s not ideal to install roof underlayments when the temperature is under 40 degrees f as it won t ensure a proper fit. Asphalt saturated felt starting at the eaves and lapping upper courses over lower by a minimum of 2 inches.

Here is a video about roofing underlayment. If you lay the felt perfectly straight you can use its lines instead of horizontal chalklines to align the shingles. Using your staple gun secure the felt to the roof. If it gets wet it will wrinkle making it harder to shingle.

What is the best temperature to install a roof underlayment. Subscribe and share please. Carefully cut the release liner on top of the roll in the cross direction being careful not to cut the membrane. Overlap each row at least 3 to 4 inches.

Do not use felt as a temporary protection against rain. On roofs with a slope of 4 12 or greater use a single layer of 15 lb. Lap allowance. Check this out.

Start by unrolling a 10 to 15 foot piece of membrane leaving the release liner in place. Installing roof felt is a two person job. Install new flashing metal. Vertical joints should lap a minimum of 4 inches and be offset by at least 6 feet in successive rows see figure 2 2 at left.

Peel back about 6 inches of the release liner in the opposite.