What the Summer Heat Can Do to Your Roof — Especially If It’s Underventilated

Introduction

Minnesota summers may be short, but they can still do serious damage to your roof—especially if your attic isn’t properly ventilated. While hail and snow tend to get all the attention, heat-related damage is one of the most overlooked causes of roof deterioration, premature aging, and shingle failure. This article covers why attic ventilation matters, what can go wrong without it, and what steps homeowners should take to prevent long-term issues.

The Hidden Danger of Heat Buildup in Minnesota Attics

On a sunny 85-degree day, attic temperatures can soar above 130 degrees if ventilation is inadequate. That trapped heat doesn't just affect your energy bills—it slowly bakes your roofing system from the inside out, leading to significant damage over time.

Common Problems Caused by Overheated Roofs

Shingle Degradation

High attic temperatures accelerate wear on shingles, causing them to curl, crack, or blister—especially lower-grade materials.

Delamination and Warping

Extreme heat can weaken the adhesive layers in shingles and warp roof decking or underlayment, compromising the structural integrity of your roof.

Voided Warranties

Most major shingle manufacturers require proper ventilation for warranty coverage. If your attic isn’t ventilated to their specifications, any warranty claim for premature shingle failure may be denied.

Ice Dams Begin in Summer

Without proper airflow, excess humidity becomes trapped in the attic year-round. That moisture becomes a major risk factor for ice dam formation in the winter.

Increased Energy Bills

A hot attic can radiate heat back into your home, forcing your cooling system to work harder and raising your utility bills in the process.

Signs Your Roof May Be Underventilated

Your attic feels excessively hot in the summer  - There are few or no ridge, soffit, or gable vents  - You’ve noticed curling or blistering shingles, especially near the ridge line  - No contractor has ever inspected your attic ventilation If any of these apply to your home, it's time for a professional evaluation.

How Custom Roofing Solutions Addresses Ventilation Problems

At Custom Roofing Solutions, we don’t just replace shingles. We inspect and upgrade the entire roofing system, including ventilation. Many of the homes we inspect show signs of: - Blocked or missing soffit vents - Ineffective or missing ridge vents - Underventilated attics that don’t meet code or warranty requirements We ensure that every roof we install meets current building code and manufacturer specifications, protecting your investment for the long term.

Schedule a Professional Roof and Attic Inspection

If you suspect your roof may be underventilated—or simply want to make sure your home is protected—schedule a free inspection with our HAAG-certified roofing experts. 

Visit: https://customroofsmn.com  

Call: (612) 723-2623