How Long Does Roofing Felt Last Under Tiles

This underlayment is far superior to a 30 pound felt and is warranted by the manufacturer for up to 20 years if installed by a tile roofing institute certified contractor.

How long does roofing felt last under tiles.

Two layers of astm 30 pound asphalt impregnated felt is the minimum you should use under tile and should last 20 to 30 years. Other modern alternatives tend to be more durable although they re usually more expensive. How long roofing felt lasts underneath your tiles will depend on the type used. How does a standard roof underlayment last.

Roofing felt that has gotten wet can be covered with shingles as long as it is allowed to dry out first the surface underneath did not get wet and it did not wrinkle bubble or rip. The 15 pound was for lighter weight projects while the 30 offered more heavy duty protection. As the sarking felt can be easily damaged by strong winds it is advisable to wait for a period of time where the felt and battens can be fitted in quick succession during fair conditions. While clay tiles are available in a host of earthy colors this roofing is best known for its bold terracotta tones extremely popular in the southwest.

Hi sarking felt is the endthat lapsover into the guttering to allow water run off. Clay tile roofs can last 50 years or longer. In the course of the water leaking through my roof onto the ceiling of a room i have been told that the roof felt underneath the concrete roof tiles is obviously the original felt ie 1970s and has gone brittle and awful with age and will need replacing entirely. That s the headline quote but as we ll soon see this can vary a lot depending on a number of factors.

The general estimated lifespan of an underlayed roof is normally around 25 years. Over a long period of time the tiles slate move vibrate in the wind up and down and hit the top of the fascia board and some times cut the felt at that point this done it allows water penertration via wind movement to ingress to the timbers inside and you know what that means one of the best and secure. Today most contractors use a minimum 40 felt we use a g 40 modified underlayment. 15 pounds per hundred square feet and 30 pounds per hundred square feet.

In the early days 30 pound felt was the most common underlayment used under tile roofs. 30 roofing felt is far better than unrated 30 pound felt which may weigh as little as 15 20 pounds. The felt roof underlay is secured by nailing direct to the rafters and then held by the battens which will be fitted to secure the tiles or slates too.