There are two types of roof underlayment typically in use today – felt and synthetic. Most roofers are familiar with felt and have used it for years beneath asphalt roofing shingles. Synthetic roof underlayments are newer and come with a number of advantages as well as a few disadvantages to their ...
Underlayments are very important to consider. Believe it or not, tile roofing systems will allow water to get below the tile and on to the underlayment. The flat tiles are worse compared to the valley profiles with humps and pans. This is one reason the battens have space every four feet ...