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FREQUENTLY ASKED QUESTIONS

Proper roof ventilation extends the life of your roof and lowers energy costs. A ridge‑and‑soffit system creates a continuous air channel from the eaves to the ridge; as warm air rises out of the ridge, cooler air is drawn in at the soffit, which keeps the attic temperature closer to the outdoor temperature and reduces moisture accumulation. This helps prevent mold, reduces the stress on air‑conditioning systems, and extends shingle life. Ridge vents are low‑profile and maintenance‑free; if local codes or roof design limit ridge vents, other options such as gable, dormer, O’Hagin, or “whirly‑bird” vents can be added. Powered fans (electric or solar) move more air but add cost and require maintenance. A qualified roofer will evaluate your roof type, attic space and building codes to recommend the right combination of ridge, soffit and supplementary vents.
Yes. Building codes require that new shingles be fastened to a solid deck; any boards with rot or gaps larger than 1/8″ must be replaced during reroofing. This “dry‑rot” repair isn’t fully visible until the old roof is removed, so contractors typically issue a change order for time and materials when rot is discovered. Replacing damaged decking with new plywood or composite ensures that nails hold properly and prevents future leaks.
Most projects begin within a few weeks after contract signing. Reputable contractors often have a queue; industry sources suggest a wait of about 2–6 weeks depending on the season and material availability. Factors such as permitting, weather, and how busy your roofer is can lengthen this to 1–3 months. Be cautious of companies that promise an immediate start—quality roofers are rarely idle—and focus on getting the job done correctly rather than quickly.

Yes. Chimneys are one of the most common leak points because they penetrate the roof. Common problems include deteriorated step flashing or counter flashing, cracked crowns, porous bricks or mortar, and missing or damaged caps. A qualified roofer can inspect the chimney, replace or re‑install step and counter flashing, repair the crown or saddle, and install or replace caps or crickets to divert water. Addressing these issues prevents water intrusion around the chimney.

Asphalt shingles come in three main categories. Three‑tab shingles are thin, flat and inexpensive; they usually last about 15–30 years but are more susceptible to wind damage. Architectural (dimensional) shingles are multi‑layer laminates that create a textured look; they resist higher winds and typically last 25–50 years. Luxury or designer shingles are the thickest; they imitate slate or wood shakes, offer the longest life and best curb appeal but cost more and are heavier. In mild climates like the Bay Area, thicker shingles aren’t necessary for weather resistance, but many homeowners choose them for aesthetics and resale value.
Both matter. A manufacturer’s warranty covers defects in the roofing materials and usually lasts 10–30 years (sometimes longer). It is voided if the product isn’t installed correctly. A workmanship warranty is offered by the contractor and protects you against installation errors; it typically spans 1–10 years. Because poor installation can void the manufacturer’s coverage, a strong workmanship warranty is as important as the product warranty. Some manufacturers offer enhanced warranties that combine material and workmanship coverage when the roof is installed by a certified contractor. Choose a roofer with top certifications to secure both warranties.
It depends on their condition. Gutters that are dented, rusted, sagging, undersized or blocking the drip edge should be replaced during roof work. Upgrading to larger or seamless gutters can improve water flow and reduce maintenance. If your existing gutters are in good shape, a roofer can detach and re‑install them. Because gutters are inexpensive compared with a new roof, replacing them at the same time ensures the system matches the roof’s lifespan and avoids paying for labor twice.
Lifespan varies by material and conditions. According to InterNACHI’s roof‑life estimates:
  • Three‑tab asphalt shingles last ~20 years, while architectural shingles last ~30 years.
  • Wood shingles or shakes last 40–50 years.
  • Clay or concrete tiles can last 75 years or more, sometimes the lifetime of the structure.
  • Metal roofs last 40–80 years.
  • Slate roofs can exceed 100 years.
Climate, color, slope, installation quality, ventilation and maintenance all affect longevity. Adequate ventilation is especially important; ridge‑and‑soffit vents help keep attic temperatures stable, preventing shingles from “baking” and prolonging their life.
Not if it’s done correctly. Solar panels and roofing have separate warranties. When a solar system is installed following the roof manufacturer’s guidelines—using proper flashing and approved mounting systems—it should not void the roof warranty. However, a roofing warranty can be voided if a third party modifies the roof improperly. Always inform your original roofer and choose a certified solar installer. Some roofing manufacturers (like GAF) offer extended roof warranties when solar panels are installed by approved contractors. Solar installers also carry their own workmanship warranties that cover any damage caused by their work.
Tesla’s Solar Roof uses tempered glass tiles and includes a warranty that guarantees the tiles’ durability for the lifetime of the house and power production for 25 yearscoastroofcleaning.com. Traditional asphalt shingles typically last 15–30 years, while concrete or clay tile roofs can last 75 years or more. Because Tesla’s product has been on the market for less than a decade, long‑term data are limited. Its premium materials and warranty suggest durability, but whether it outlasts high‑quality tile roofs remains to be seen. Choosing an experienced installer is essential to ensure the roof meets warranty expectations.
Yes. Concrete and clay roof tiles are among the most durable roofing materials; concrete tiles often last 75 years or more, and studies have found that concrete, clay and slate tiles are designed to last the lifetime of the structure. Asphalt shingles, by contrast, have an expected life of 15–30 years. Tile roofs are heavier and more expensive to install, requiring additional structural support and skilled workmanship, but they provide a longer service life and strong return on investment.
Quality gutter guards dramatically reduce clogs and maintenance. Mesh or perforated screen guards allow water through while blocking medium‑sized debris and are low‑profile and durable. Micro‑mesh guards use finer stainless‑steel or aluminum screens that filter small particles like roof grit and pine needles; they’re highly effective but cost more and often require professional installation. Surface‑tension (reverse‑curve) guards channel water into the gutter while shedding leaves; they work well in heavy rain but are bulkier and more expensive. Foam and brush guards are inexpensive DIY options but need more frequent cleaning. When choosing, consider the type of debris, your climate and budget. Even a basic guard is usually better than nothing, and investing in a good system can prevent costly water damage.
Skylights are essentially roof windows; they flood large spaces with natural light and can be vented for airflow. Installing one is a full construction project—roofers must cut the roof, frame the opening, add drywall, flashing and painting—so it takes longer and costs more. Sun tunnels (or tubular skylights) are acrylic domes connected to reflective tubes with a diffuser; they channel sunlight into smaller areas like hallways, closets or bathrooms. They are much quicker to install (about three hours) and cost less. Sun tunnels deliver concentrated light but don’t provide a view or ventilation. Choose skylights for large rooms where abundant light and a view are desired; choose sun tunnels for small, dark spaces or when budget and installation time are concerns.
It might seem logical to install solar mounts while reroofing to avoid drilling later, but the decision depends on timing and warranties. Industry experts advise replacing an old roof before adding solar; if your roof has five years or less of life left, replace it before installing panels. If the roof is new or has more than five to seven years remaining, install solar now and let the solar installer handle the mounts. Combining roof replacement with solar installation can save money and streamline the process. High‑quality mounting systems have 25‑year warranties, and many solar companies offer longer workmanship warranties than roofing companies. Coordinating both trades through one company (Clean Roofing and its sister company Clean Solar, for example) avoids miscommunication and ensures both warranties remain valid. In most cases, finishing the roof first and then installing solar mounts leads to longer combined warranties and fewer logistical headaches.
Absolutely. After choosing the type of roof (asphalt, metal, tile, etc.) and the style of shingle or panel, your roofer can provide physical color samples to view in person. Many manufacturers also offer online visualizer tools that let you upload a photo of your home and “try on” different colors and styles, making it easier to narrow down your options before committing. Once you have a shortlist, your contractor can place sample boards on your roof so you can see how the colors look in real sunlight before making a final decision.

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Clean Roofing proudly installs, maintains, and repairs residential and commercial roofs, serving the Bay Area in Northern California.

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