Tile Roof Underlayment
Replacement Specialists

Your Underlayment Is Your Real Roof

Here's what most Arizona homeowners don't realize: the beautiful tiles on your roof are not the waterproofing layer. They're a protective shield for the underlayment beneath — and that underlayment is what actually keeps water out of your home. In Arizona's climate, standard underlayment typically lasts 20-25 years before heat and UV exposure cause it to become brittle, crack, and eventually fail. When that happens, water finds its way into your attic, your walls, and your living spaces — often with no visible warning from the outside.

Monument Roofing's underlayment replacement process is the smart alternative to a full roof replacement when your tiles are still in good condition. We carefully lift and number each tile, remove the failed underlayment, inspect and repair the deck as needed, install new high-performance synthetic underlayment, and reset your original tiles in their exact positions. The result: a fully renewed waterproofing system with your existing roof profile intact — typically saving 30-50% compared to a complete tear-off and replacement.

Signs Your Underlayment May Be Failing

• Water stains on ceilings or walls — Even small, intermittent stains can signal underlayment failure.
• Granules in gutters — If your underlayment is the older granulated type, finding granules means it's degrading.
• Visible underlayment between tiles — Cracked or missing tiles expose the underlayment to UV, accelerating failure.
• Roof age over 20 years — If your roof is approaching or past 20 years old in Arizona, proactive underlayment assessment is critical.