Roof installation time depends on your home’s size, the roofing material, and San Francisco’s weather conditions. Slate roofs usually take the longest because each stone piece is installed by hand, often taking one to three weeks. Wood shake, cool roofs, and spray foam systems are faster and typically take a few days. Solar roofs need around five to ten days because of the electrical setup. TPO and PVC flat roofs are also quick, usually completed in two to four days, while modified bitumen and green roofs fall in the mid-range, taking several days to complete. Our team works efficiently and adjusts to local weather so your installation is completed on time and with high-quality workmanship.
Look for a roofing company that offers licensed installers, strong warranties, transparent pricing, and proven experience with your roof type. Always check reviews, recent projects, and whether they provide a free inspection before installation.
Choose a residential roofing installer who understands local building codes, offers multiple material options, and provides a written installation process. A good contractor will inspect your home, explain material choices (like asphalt, metal, or tile), and give a clear project timeline.
Different roofs need different tools and trained specialists. Slate roofs require experts who can cut and set heavy stone tiles with precision. Wood shake roofs need tools for cutting wood and nail guns for fast, neat installation. Cool roofs use rollers or sprayers to apply reflective materials. Solar roofs need both roofers and electricians to install panels and connect the wiring safely. Flat roofs like TPO and PVC use heat-welding machines to seal the material tightly, while modified bitumen roofs require torches to bond multiple layers. Green roofs combine roofing tools with gardening equipment to install waterproof layers, soil, and plants. Spray foam roofs use large sprayers and safety gear to apply and cure the foam correctly. Our San Francisco team uses all the right tools and skills to install every roof safely and professionally.
Sometimes a new roof can be installed over an old one, but it depends on the roof type and the condition of the existing surface. Slate roofs always require the old roof to be removed because slate is extremely heavy and needs a strong, clean base. Wood shake roofs usually need a fresh start, but if the old roof is in excellent condition, an additional layer may be possible. Cool roofs can sometimes be applied as a coating over a good roof, but new cool roof tiles need a clean foundation. Solar roofs generally require a new roof for proper wiring, although standard solar panels can be mounted on a solid existing roof. TPO and PVC flat roofs can be installed over an old roof if it’s still in good shape, but damaged flat roofs must be removed. Modified bitumen can also go over a stable flat roof, while weak or leaking surfaces must be replaced. Green roofs almost always require starting fresh because the waterproofing, drainage, and plant layers need a clean, reinforced base. Spray foam roofing can safely go over a good roof since it’s lightweight, but old roofs with damage are removed first. We always offer a free inspection to determine whether your existing roof can stay or if a new foundation is needed.
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Before installing any new roof, we prepare your home carefully to make sure the process is smooth and the roof lasts for years. Asphalt roofs require removing the old materials, checking the base for damage, and adding a waterproof layer. Metal and clay tile roofs need a clean base and a strong structure because the materials are heavier. Slate roofs also need a stable, reinforced foundation and a smooth surface for proper tile placement. Wood shake roofs require old roofing removal, a waterproof layer, and proper ventilation to prevent moisture issues. Cool roofs need a repaired and even base with added insulation, while solar roofs require a strong roof deck and waterproofing before connecting the solar components. Flat roofs like TPO, PVC, and modified bitumen are prepared by cleaning the surface, repairing any weak spots, and adding the right base layers so the materials bond properly. Green roofs need waterproofing, a drainage system, and a special base to support the plants. Spray foam roofs are prepared by cleaning the surface, fixing soft or damaged areas, and ensuring the roof is dry so the foam adheres tightly. We always provide a free inspection to confirm your home is ready for the installation stage.