Everything we’ve pointed out so far is fairly easy to spot. However, deteriorating underlayment is harder to see because – as its name implies – it’s underneath the tile, which protects your roof from water penetrating through to the interior. Getting up on your roof and uncovering tiles to check your underlayment isn’t something you want to do yourself.
Here’s the most important thing to know – the underlayment on your tile roof needs to be replaced eventually. Usually between 12 and 20 years is about how long you can expect it to last in a climate like Phoenix.. If your roof is more than 12 years old and hasn’t been inspected in some time, you should contact an experienced tile roof repair company for a comprehensive roof inspection.
Does Your Underlayment Need Replacing?
The underlayment and flashings are critical on a tile roof because they are the primary water barrier to keep moisture from penetrating your roof. The tiles themselves are mostly for architectural curb appeal and helps to protect the underlayment. Since the tiles can last 50 years or more, your underlayment needs to be of similar quality. Usually, the tiles on the roof will outlast the underlayment and the flashings around your roof penetrations.
Whatever type of underlayment is deployed on your tile roof, the installation is as critical as the material used. It’s most important that proper sealing measures and flashing material is used at all penetrations for chimneys, skylights, pipes and roof vents. Valleys in your roof are also problem areas that need special attention.