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Roof Replacement Contractor in the Bay Area
Hamilton Exteriors is a licensed roof replacement contractor. One contract covers the tear-off, deck repairs, underlayment, flashing, ventilation, new roofing, permit, and final inspection. Serving the Bay Area and Greater Sacramento.
500+ projects
Since 2018
50-Year
GAF System Warranty
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We'll call within 3–5 minutes to schedule your consultation.
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Roofing certifications and contractor credentials
Customer-Service Obsessed
Responsive from consultation through project closeout
Architect and general contractor
One accountable team
Licensed, bonded, and insured
Verified business credentials
A roof replacement should address the complete assembly, not only the visible covering. We inspect roof planes, drainage, penetrations, ventilation, and accessible deck conditions before setting the scope. Those findings guide material quantities, flashing details, and work around chimneys, vents, and roof edges.
Tear-off exposes the deck and shows damage that old roofing can hide. The crew repairs affected sheathing before installing the specified water-control layers, flashing, ventilation, and finished roofing. Each layer must connect correctly so water moves from the ridge and roof planes into the drainage system.
Roof replacement decisions often change after tear-off exposes the deck. The final scope should state how hidden sheathing damage, weak attachment areas, or ventilation conflicts will be documented and approved. That keeps field decisions clear without mixing unforeseen repairs into the planned roof assembly.
How We Replace a Residential Roof
The work moves from roof measurements to a permitted, inspected installation.
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Inspect and Measure the Roof
We document roof area, pitch, drainage, penetrations, ventilation, access, and visible damage. This review sets the replacement scope and material quantities.
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Remove Roofing and Repair the Deck
The crew tears off the old roof and inspects the exposed sheathing. Damaged deck areas are replaced before the new roof assembly begins.
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Install Through Final Inspection
We install underlayment, leak barriers, flashing, ventilation, finished roofing, and ridge details. The project continues through required inspections and closeout.
Roof Replacement Assembly Check
| Component | What We Review | Why It Matters |
|---|---|---|
| Existing roofing | Layers, condition, and removal scope | Sets tear-off and disposal work |
| Roof deck | Sheathing condition and attachment | Provides a sound base |
| Water control | Underlayment, valleys, edges, and flashing | Directs water off the roof |
| Ventilation | Intake, exhaust, and attic conditions | Supports the complete assembly |
| Penetrations | Vents, skylights, walls, and equipment | Requires coordinated flashing |
Define the Complete Replacement Scope
Measurements alone do not define a roof replacement. Roof shape, access, existing layers, deck condition, drainage, ventilation, and penetrations affect the work. We document these conditions before final material ordering and installation planning.
Inspect the Deck After Tear-Off
The deck supports every new roof layer. Removing old roofing exposes soft, split, or damaged sheathing and weak attachment areas. We record affected sections and complete approved repairs before underlayment covers the deck.
Connect Every Water-Control Detail
Underlayment, roof edges, valleys, sidewalls, chimneys, vents, and drainage must work together. We coordinate these details with the selected roof covering and carry the assembly through required inspection and closeout.
Roof Replacement Financing Options
Roof replacement costs can include tear-off, deck repairs, underlayment, flashing, ventilation, permits, and installation. Financing is available with approved credit for eligible roof replacement costs. During your consultation, we explain available terms, eligible work, and payment timing.
Ask about roof replacement financing during your consultation.
Call Now (650) 977-3351 Roof Replacement Reviews
Homeowner feedback from completed roofing projects.
Laarni yet
a month ago
They offered a reasonable price for my roof replacement, and overall I’m satisfied with the work. The main issue was that it took quite a while to finish because of the permit process. At one point, I was worried that the roofing materials left at the property might be stolen, so I texted them about it. They responded to my message right away, which I appreciated, and luckily nothing was stolen. Overall, the price was fair, they were responsive when I had concerns, and the project was completed.
Chandra Williams
a week ago
Roof City did an excellent job on my roof. They were professional, fast, efficient, and clean. They over- delivered on their promise to do a five- star job in two days, which included all materials and permits needed. They deserve a 10 star rating 🌟 ✨ 💫🌟✨💫🌟✨💫☀️🙌🏾😀👍🏾
Abe Mendoza
a month ago
Very Satisfied with Hamilton Exteriors work replacing roof. Good price and flexible payment plans. They took care of the permits and cleanup. Great communication and response times. Highly recommend.
Ernesto Garlitos
a month ago
The team dis an excellent job on our roof. Carlos and his team are punctual, communicative and kept the worksite clean throughout the project. There was a slight delay in the beginning but the whole process felt smooth and stress free. Alex was generous enough to add in extra service worth $759. Highly recommended, honest roofing work.
Frequently Asked Questions
Didn't find the answer to your question? Call Now (650) 977-3351
How do I know whether I need roof repair or replacement?
The decision depends on the leak source, affected area, deck condition, roof age, and condition of the surrounding materials. We inspect the full roof before recommending a targeted repair or complete replacement.
Does roof replacement include damaged decking?
Tear-off lets us inspect the exposed sheathing. We document damaged areas and define needed deck repairs before covering them with the new assembly.
Can a roof be replaced without removing the old roofing?
Existing layers, deck access, code requirements, and the selected roof system determine the scope. Tear-off provides direct deck access and lets the crew rebuild underlayment and flashing from a known surface.
What happens to flashing during roof replacement?
We review valleys, walls, chimneys, skylights, vents, and roof edges. The scope replaces or rebuilds flashing where needed so these details connect with the new roof assembly.
Does ventilation matter during roof replacement?
Yes. Intake, exhaust, attic conditions, and roof geometry affect the ventilation plan. We evaluate these conditions before installing the new roofing.
How do you handle roof-mounted equipment and penetrations?
We map vents, skylights, solar attachments, and other roof penetrations before work starts. The scope coordinates access, compatible flashing, and any qualified trade work needed for removal or reconnection.
Get Your Roof Replacement Quote
Tell us about your project. We usually call within 3–5 minutes.
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Roofing Services by City
21634 Redwood Rd Unit F, Castro Valley, CA 94546
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