Replacing a roof ranks among the largest home improvement investments you'll make. It's not a decision to rush, but it's also not one to delay when your current roof has reached its limits. Understanding the process helps you plan effectively and avoid surprises.
When Replacement Beats Repair
Most roof problems have repair solutions. But there comes a point when continued repairs become a losing game.
Age is the primary factor. Asphalt shingle roofs in San Diego typically last 20 to 25 years with good maintenance. Our intense sun exposure shortens that lifespan compared to cloudier climates. If your roof is approaching these ages and showing multiple problem areas, replacement makes more financial sense than repair.
Widespread damage tells its own story. A few cracked tiles or missing shingles warrant repair. But when issues appear across the entire roof surface—extensive granule loss, multiple leak points, widespread cracking—the system has failed and needs replacement.
Structural concerns demand immediate attention. Sagging areas, spongy spots when walked on, or visible daylight through the deck all indicate damage that re-roofing can't address. These situations require full tear-off and possible deck replacement.
The choice between re-roofing and full replacement affects your options. Re-roofing (adding new shingles over existing ones) works only when the current layer is in reasonable condition. San Diego code allows one re-roof over original shingles. If you've already done this, or if the existing shingles show significant damage, full tear-off is required.
Every roofing project disturbs your daily routine. Set realistic expectations for noise, debris, and limited access to certain areas during the work.
Material selection impacts long-term value. Different roofing materials suit different homes and priorities:
- Asphalt shingles offer the best value for traditional looks and reliable performance
- Tile roofs provide exceptional longevity and fire resistance for appropriate architectural styles
- Metal roofing delivers durability and energy efficiency for contemporary designs
- Flat roof membranes work for additions, garages, and ADUs with low slopes
Your roof structure may limit choices. Tile weighs significantly more than asphalt. Older homes might need structural reinforcement before supporting a tile roof. A qualified contractor will assess your framing and advise on options.
Permits and inspections are required for roof replacement in San Diego. Reputable contractors handle permit applications as part of their service. The permit process ensures work meets building codes and protects your property value.
Timeline planning prevents frustration. Schedule the project well before rainy season. A typical residential roof replacement takes three to five days, but weather delays can extend that. Starting in summer gives you the best chance of uninterrupted work.
Your presence isn't required during installation, but someone should be available for questions. Contractors may encounter unexpected conditions—rotted decking, improper previous repairs, code compliance issues—that require decisions.
Warranty structures vary significantly. Manufacturer warranties cover material defects. Workmanship warranties cover installation issues. Understand what's covered, for how long, and what might void coverage before signing any contract.
