Navigating Local Building Codes for Roof Replacements

What Homeowners in Western Pennsylvania Need to Know

Replacing your roof isn’t just a matter of choosing shingles and calling a contractor. In Western Pennsylvania, you also have to comply with local building codes and municipal requirements that ensure the safety and integrity of your roofing system.

At Gerken Roofing, we walk our clients through this process every day. Here’s what you need to know before starting your next roofing project.

Why Building Codes Matter

Building codes exist to protect you, your neighbors, and your home. They ensure that roofing projects meet standards for:

• Structural safety

• Fire resistance

• Energy efficiency

• Proper drainage and ventilation

Failing to follow local codes can result in fines, delays, or even needing to tear off and redo the job.

1. Permit Requirements

Most municipalities in Western PA require a permit for roof replacement. The requirements vary by township or borough and may depend on factors like:

• Whether you're tearing off or laying over existing shingles

• The total square footage of work

• Structural changes (e.g., replacing decking)

Tip: Always verify with your local zoning office. At Gerken Roofing, we handle the permitting process on your behalf.

2. Tear-Off vs. Overlay Rules

Some localities allow you to install a new layer of shingles over an old one—others don’t. Many municipalities prohibit more than two layers due to weight concerns and code restrictions.

Best Practice: We recommend a full tear-off for durability, code compliance, and to reveal hidden damage beneath old materials.

3. Ice and Water Shield Requirements

In Western Pennsylvania’s snowy climate, most municipalities require an ice and water barrier to be installed along the roof's eaves. This helps prevent leaks caused by ice dams.

Standard: Typically, a 36-inch-wide shield is required, but exact specifications vary by jurisdiction.

4. Ventilation Standards

Improper ventilation can void warranties and reduce roof lifespan. Building codes often require minimum ventilation ratios (like 1:150 or 1:300 of attic space to ventilation).

Compliance: Ridge vents, soffit vents, and attic fans may be required to meet code and manufacturer guidelines.

5. Inspection Protocols

After your roof is replaced, an inspector from the local municipality may conduct a site visit to verify the work meets code. This step is crucial for closing out permits and ensuring everything is up to standard.

Roofing with Peace of Mind

When you choose Gerken Roofing, you’re not just getting a high-quality roof—you’re getting a partner who knows the ins and outs of local code compliance. We make the process seamless, so you can focus on enjoying your new roof, worry-free.