Shingles

While some local building codes do technically allow for a second layer of shingles, it is generally not recommended as a best practice for a long-term roofing system. Layering new shingles over old ones introduces several hidden risks: Trapped Moisture: It conceals the roof deck, meaning any existing rot, water damage, or sagging cannot be inspected or repaired. Weight Constraints: A second layer doubles the weight on your roof structure, which can cause structural straining or sagging. Shortened Lifespan: The old shingles trap heat, which can cause the new shingles to bake from underneath, curl prematurely, and void the manufacturer's warranty. Aesthetic Issues: New shingles will telegraph any unevenness, bumps, or curling from the old layer underneath. To protect your investment, we highly recommend consulting a licensed roofing contractor to pull a permit, check local code limits, and evaluate if your specific roof structure can safely handle the extra weight."