15 Things About the Roofing Industry You Wish You Knew: Insights from KM Builders

Published October 24, 2025 by KM Builders

15 Things About the Roofing Industry You Wish You Knew: Insights from KM Builders

Whether you're replacing a roof for the first time or the third, there's always more to learn. Here are fifteen things about the roofing industry that every homeowner should know.

1. Price Isn't Everything

The cheapest bid often becomes the most expensive choice after factoring in callbacks, repairs, and premature replacement.

2. Permits Are Required

Full roof replacements typically require permits. A contractor who offers to skip permits is cutting corners that could void your homeowner's insurance.

3. Decking Condition Matters

The condition of your roof's decking (the plywood underneath shingles) significantly affects the finished product. Budget for potential decking replacement.

4. Ventilation is Critical

Proper attic ventilation extends roof life and reduces energy costs. Ensure your roofing contractor addresses ventilation as part of the job.

5. Manufacturer Warranties Require Certified Installers

The best material warranties often require installation by manufacturer-certified contractors. Verify your contractor's certifications.

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Additional insider knowledge includes: the importance of proper flashing installation, why ice and water shield matters even in California, how to evaluate roofing bids fairly, what questions to ask your contractor, and how to maintain your new roof for maximum lifespan.

Contact KM Builders for a residential construction consultation