Schedule Appointment
Austin Pro Calender Icon
Appointment
phone icon
Call Us
Austin Pro Siding, Windows, Roofing, Patio Covers Logo

The Importance of Replacing Your Roof’s Old Underlayment

By
austin pro
Written by Austin Pro Management
July 22, 2024

Your roof plays an essential role in your home’s aesthetic appeal and functionality. Thus, you must see to it that it is in good condition to ensure its optimal performance. Austin Pro Siding, Windows & Roofing, one of the top roofing and vinyl siding contractors in the area, explains why you need to replace your old roof underlayment.

The Importance of Your Roof Underlayment

The asphalt shingles or metal panels of your roof protect your home against the harmful effects of moisture and UV rays. However, some areas of your roof aren’t protected, resulting in gaps where debris, water and the other elements. This is where the underlayment does its job.

It acts as your roof’s secondary barrier, shielding the deck, rafters and trusses from rot while providing stability to the whole structure. Reputable roofing and window companies make sure to install it to manufacturer specifications to maximize its effectiveness.

Why Should You Replace It When It Gets Old

Simply put, an underlayment that is past its service life no longer offers the protection necessary for your home. The same goes for the rest of your roof components, including the flashing and shingles. Be sure to have them inspected by experienced roofers so you can determine whether it needs to be replaced. If they do recommend a replacement roof, see to it that they perform a complete tear-off.

Some roofers leave the old roof covering and the underlayment and place a new one over it. It is called a roof overlay, and it only works when these components are still in good condition. A roof that is past its service life can have underlying issues underneath the shingles and underlayment, which is why a complete tear-off is done before installing the new roof.

In addition to siding repair and installation, Austin Pro Siding, Windows & Roofing also specializes in roof replacement. By combining high-quality roofing products with excellent craftsmanship, we can install roofing systems that can withstand the local climate and improve your home’s curb appeal. Give us a call today at (512) 550-0000 to learn more. You may also fill out our contact form to schedule an appointment.

Why Austin Families Trapped by 3% Mortgages Are Giving Up on Zillow and Investing in a Full Window Replacement Instead
May 21, 2026
Why Austin Families Trapped by 3% Mortgages Are Giving Up on Zillow and Investing in a Full Window Replacement Instead

Austin homeowners locked into low-rate mortgages are skipping the housing market and investing in full window replacement instead — and the financial case is compelling. Aging builder-grade windows are silently draining energy budgets, creating unusable "oven rooms," and leaving thousands in federal tax credits on the table. Learn how to turn your home equity into a smarter, longer-lasting investment.

The Dirty Secret Behind Those $199 Window Replacement Ads Flooding Austin Neighborhoods
April 16, 2026
The Dirty Secret Behind Those $199 Window Replacement Ads Flooding Austin Neighborhoods

Those $199 window replacement mailers flooding Austin neighborhoods are designed to get a salesperson in your door — not to give you a real price. Learn how budget window companies use bait-and-switch tactics, inferior vinyl, and shoddy installation to cut corners at your expense. Here's what a trustworthy window replacement quote actually looks like in Central Texas.

Is It Time for House Siding Replacement?
February 28, 2026
Is It Time for House Siding Replacement?

Spot the subtle signs of rot and wear that indicate it’s time to replace your siding.

Why We Had to Completely Tear Out a 'Brand New' Window Replacement in Round Rock Last Week
March 31, 2026
Why We Had to Completely Tear Out a 'Brand New' Window Replacement in Round Rock Last Week

A Round Rock homeowner paid $2,100 for a window replacement that failed after a single rainstorm — leading to water damage, wood rot, and a $6,800 repair bill. Learn the three questions every Austin-area homeowner must ask before hiring a window contractor, and why the lowest bid is almost never the cheapest option.

How a New Roof Can Help You Save Energy
February 28, 2026
How a New Roof Can Help You Save Energy

A new roof does more than keep you dry. Discover how modern roofing systems improve insulation and ventilation to lower energy costs.

Metal Roof Installation Over Old Shingles: Yay or Nay?
February 28, 2026
Metal Roof Installation Over Old Shingles: Yay or Nay?

Can you layer metal over old shingles? We explore the pros, cons, and code requirements.