Felt Under Roof Tiles

When most people think of roofs they typically think of shingles or metal roofing.

Felt under roof tiles.

Is roofing felt underlayment needed under roof shingles tiles slate wood shingles or shakes. Fifteen pound or heavier felt underlayment is required by code in some areas. Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment. 30 roofing felt is far better than unrated 30 pound felt which may weigh as little as 15 20 pounds.

But what some may not know is there s another layer of protection directly on top of the roof deck and under the roof covering that performs a critical role in protecting your home from moisture damage. 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. Item 656632 model 0903000.

Two layers of astm 30 pound asphalt impregnated felt is the minimum you should use under tile and should last 20 to 30 years. As stated in best practices guide to residential construction. Synthetic roof underlayment is a lot better than felt. Many contractors prefer a temperature resistant self adhering underlayment such as tarco ps200ht high temperature underlayment which is designed for use under metal and tile.

Is synthetic roof underlayment better than felt. The roof deck should be sound and level before laying the underlayment. In florida hot mopped asphalt in 90 felt was the benchmark underlayment for tile roofing systems for many decades and is written into many of the building codes. The first thing is synthetic roof underlayments have a uv coating.

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.