by TeamFFE

September 12, 2023

Cracking and Blistering: A Roof’s Worst Nightmare

For the discerning homeowners of St. Louis, protecting your family’s abode is paramount. A roof serves as the first line of defense against the elements, and ensuring its health is crucial. As you sip your morning coffee, staring out at the Gateway Arch, the last thing you want on your mind is a compromised roof. Here, we’ll delve into two common roofing issues: cracking and blistering. Understanding these problems is the first step to safeguarding your home.

1. What Causes Roof Cracking and Blistering?

The diverse climate of St. Louis, with its sweltering summers and icy winters, can be demanding on a roof.

Cracking generally occurs in shingles, especially as they age. The major causes include:

  • Weathering: Shingles expand and contract with temperature changes. Over time, this can lead to cracks.
  • Poor installation: Incorrectly placed fasteners or lack of underlayment can lead to cracks.
  • Aging: As roofs age, they naturally degrade, leading to potential cracking.

Blistering is seen as raised portions on the roofing material. Primary causes are:

  • Moisture: Trapped moisture under or within the shingles can lead to blisters when heated.
  • Poor ventilation: Without proper attic ventilation, heat can accumulate, causing blistering.
  • Improper installation: Overheating during installation can cause initial blistering.

2. Why are Cracking and Blistering a Concern?

Both issues compromise the integrity of your roof.

  • Moisture intrusion: Cracks and blisters can allow water to seep into the underlayment and further into your home, leading to structural damage and mold growth.
  • Shortened lifespan: If not addressed, these problems can lead to premature roof replacement.
  • Aesthetic issues: Beyond functionality, a damaged roof affects the curb appeal of your home.

3. How to Spot These Issues

It’s not always easy for St. Louis homeowners to spot roof damage from ground level. However:

  • Routine inspections: Hiring professionals, like Family First Exteriors, for regular inspections can help spot problems early.
  • Interior checks: Look for signs of water damage in the attic or on ceilings.
  • Examine after extreme weather: After significant hail or a storm, it’s always wise to check your roof.

4. Solutions

While spotting the problem is crucial, what’s even more vital is addressing it.

  • Professional repair: If cracks or blisters are isolated, a professional can repair the affected sections.
  • Improved ventilation: If poor ventilation is a root cause, consider adding or improving attic vents.
  • Total replacement: In severe cases or if the roof is old, it might be time for a new roof.


St. Louis, with its rich history and vibrant communities, deserves homes that stand strong. It’s not just about a house—it’s about family and legacy. Tending to issues like roof cracking and blistering ensures your home remains a safe haven. At Family First Exteriors, we’re dedicated to providing solutions tailored to every St. Louis home’s unique needs. Because your family comes first. Always.

If you see cracks on your roof, then just fill out the form below, we will reach out to you and discuss further steps.