The installation of a tile roof should be as focused on the underlayment as the tiles themselves. If you don’t have a sustainable underlayment in place, your roof will not last as long as it should, and you may experience leakage into your home. Learn as much as possible about the types of underlayment to help you make the right choice of material.
If you live in a locale that sees extremely cold winters, titanium underlayment may save your roof from the damage commonly seen in icy cold temperatures. Titanium is immune to the stiffening and cracking of felt and synthetic underlayment, and is often guaranteed to be crack-free until 100 to 200 degrees below zero. Its strength and resistance to water make it a very sustainable choice.
For a long time, felt roofing dominated the underlayment market. This worked out for people who didn’t experience heavy winters or extreme weather on a regular basis. For those who do, synthetic underlayment mimics felt roofing, but is more weather resistant and better able to handle all types of weather. Synthetic is also often used as a second layer for roofs that need more protection from ice and snow, and can be fire-rated for areas which are prone to hot and dry conditions or have the possibility for wildfires.
Felt underlayment has long been the most commonly installed type of underlayment for several reasons. First, asphalt roofs almost always require that felt be used as underlayment. Another reason is that asphalt is rated as Class A, but only when placed over felt underlayment. Not only would you void your roof warranty, but your housing insurance might also be voided if your roof is not protected against fire. It is vital that you check these facts if you are going to deviate from a recommended felt underlayment.
Peel and Stick
Peel and stick underlayment is relatively new, and it has recently taken off in areas that are often hit by hurricanes. Peel and stick can be used in areas where a roof has been blown off in a storm and is waiting to be repaired, as it can last up to six months exposed to the elements.
As an underlayment for tile, there are several advantages. It’s called peel and stick because you literally peel it from the backing and stick it on—there’s no need to nail it down. This also adds to its flexibility and ease of installment. Peel and stick can be placed in the usually hard to install places without much trouble. It’s very difficult to rip or corrode peel and stick, and its surface has good traction, making the laying process safer.
Before you decide on an underlayment, you need to check with your tiling manufacturers to see if there’s a certain type required. As you’ve seen, most asphalt roofs require felt underlayment. You run the risk of voiding your warranty if you choose a different type of underlayment than the one the manufacturer recommends.