Full Roof Replacement + Integrated Solar
Solar Built Into
Your New Roof.
Westmark installs qualifying full roof replacements with GAF Timberline Solar® energy shingles. The roofing system goes in under one GAF contract, while GAF manages the solar and electrical scope — from permitting and battery installation through commissioning and utility Permission to Operate.
Get an instant budget estimate in about 60 seconds using aerial roof data — no appointment or sales call required.
Solar is offered exclusively as part of a full roof replacement — using GAF Timberline Solar.
We do not offer standalone solar installations. Timberline Solar energy shingles are installed by Westmark as part of a complete GAF roofing system, with the solar and electrical scope contracted through and managed by GAF.
Solar is part of the roof — not bolted on after. Westmark only installs solar as integrated GAF Timberline Solar shingles, included in your full roof replacement scope. If you're looking for a standalone solar install on an existing roof, we're not the right fit.
Solar contracting disclosure: The homeowner enters into a single contract directly with GAF covering the complete roof-and-solar project — including Westmark's roofing price — with Westmark Roofing listed as the installation partner. GAF is responsible for the solar and electrical scope, applicable solar permitting, licensed electrical work, system commissioning, and utility Permission to Operate. Westmark performs the roof replacement, obtains the roofing permit, and presents one final contract price for the entire project.
The Problem with Bolted-On Solar
Why Rack-Mounted Panels
Can End Up Costing You Twice.
When solar gets bolted onto an aging roof, the costs add up fast.
Bolted-On Solar — The Trap
- Rack mounts can add many new penetrations to an aging roof deck
- Third-party penetrations can affect roof warranty coverage, depending on the installation
- You may pay twice for labor — once for the roof, again to redo it for solar
- Scheduling conflicts between two separate crews
- Accountability can be unclear when something goes wrong
The Westmark Way
- Roof and solar installed together as one integrated GAF roof-and-solar system
- GAF Timberline Solar shingles install flush — no rack mounts
- Penetrations designed into the roof system from day one
- One project — Westmark handles the roofing scope throughout
- Roofing and solar protection backed by the applicable GAF warranty documents
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GAF Timberline SolarThe Solar Roof That Actually Looks Like a Roof.
GAF Timberline Solar shingles install just like normal asphalt shingles — nailed directly into the roof deck — and lay flat instead of sitting on rack mounts. The result: a clean roofline, coordinated GAF warranty protection, and penetrations designed into the roof system from day one.
Whole-home installation
Solar shingles blend with the surrounding roof — no visible rack systems.
Low-profile, integrated
Solar shingles install at the same plane as standard shingles — flush, not raised.
Built Into the Roof
One Continuous Roofing System — Top to Deck.
Timberline Solar is installed as part of your roof — deck, leak-barrier, underlayment, shingles, and solar energy shingles — all manufacturer-matched, with the roofing system installed by Westmark and the electrical scope handled by GAF's licensed team.
- Installs like a standard shingle — no rack-and-bracket assembly
- Hand-nailed with 6 nails per shingle — never staples (GAF Golden Pledge spec)
- Eligible for GAF system warranty coverage
- Designed for the same lifespan as the surrounding roof
- Installed by Westmark as part of your full roof replacement
Watch It Go On
See GAF Timberline Solar Installed.
A short look at how the nailable solar shingle system goes on and performs — straight from GAF.
How It Works
From Quote to Power — All in One Roof Replacement.
One contract, one project. Westmark installs the roofing system; GAF contracts for the full project and manages the solar and electrical scope.
Step 1
Roof + Solar Quote
Westmark develops the roofing scope, obtains the preliminary Timberline Solar system quote from GAF, and presents one final contract price for the entire project.
Step 2
One Contract with GAF
You sign a single contract directly with GAF that covers the complete project — including Westmark's roofing price — with Westmark listed as the installation partner. Westmark obtains the roofing permit, while GAF handles the applicable solar and electrical permitting.
Step 3
Integrated Roof Installation
Westmark removes the existing roof and installs the complete roofing system, including the nailable Timberline Solar energy shingles, in accordance with the applicable installation requirements.
Step 4
Electrical Work + Battery
GAF provides the licensed electrical team responsible for conduit, electrical equipment, battery storage, inspections, and system commissioning.
Step 5
Utility Approval
GAF handles utility approval and Permission to Operate before the system is activated.
Designed Around California's NEM 3.0 Environment.
Westmark normally quotes Timberline Solar projects with battery storage. Under California's current NEM 3.0 structure, storing solar energy for use later in the day can materially improve how homeowners use the power their roof generates. A battery-free design may still be available when appropriate, but battery storage is the standard configuration we present.
- Store daytime solar production for evening use
- Improve onsite use of the energy the system produces
- Optional backup capability when configured for outage protection
- Final battery brand, capacity, placement, and availability determined during system design
The Technology
The World's First Nailable Solar Shingle.
GAF Timberline Solar isn't a panel system — it's a building-integrated photovoltaic (BIPV) roof. The shingle is the solar, and it installs alongside standard GAF Timberline shingles with the same crew and tools.
57 W
Per energy shingle
Each shingle generates clean solar power and lays flush like a standard shingle.
~1.7 kW
Per roofing square
About 30 energy shingles cover one square of roof.
3.36 lb
Per square foot
Installed system weight — comparable to a standard architectural roof.
2:12+
Roof pitch
Installs on most residential roof slopes.
BIPV
Built-in photovoltaic
The shingle is the solar — no racks, no separate panels.
PERC
Monocrystalline cells
High-efficiency solar cells built into every nailable shingle.
Tested & Certified
Specifications reflect GAF's published Timberline Solar data and may vary by product line and project scope. Full specifications are available in GAF's Timberline Solar product documentation.
Coordinated GAF Protection
Coordinated Roof and Solar Protection.
Because the solar is built into the roof, both sides of the project carry coordinated GAF warranty protection — backed by the applicable GAF warranty documents.
The Roof: GAF Golden Pledge
Qualifying roofing components and workmanship are protected by the GAF Golden Pledge® Limited Warranty, subject to its eligibility requirements and complete terms.
The Solar: GAF Solar Max Limited Warranty Addendum
Qualifying Timberline Solar components, electrical workmanship, and energy-production coverage are addressed through the applicable GAF Solar Max Limited Warranty Addendum, subject to its eligibility requirements, exclusions, and complete terms.
The Golden Pledge Limited Warranty and Solar Max Limited Warranty Addendum are separate warranty documents with different terms, covered components, limitations, and exclusions.
Two Straightforward Ways to Fund Your Project.
Pay Outright
Pay for your roof-and-solar project by cash or check — no financing, no interest, no monthly payment.
Third-Party Financing Through GAF
Because your Timberline Solar contract is entered into directly with GAF, GAF makes third-party financing options available for the project. Financing terms, eligibility, and approval are determined by GAF and its financing partners — Westmark itself does not offer or arrange financing.
Financing details →A note on incentives: the federal residential solar tax credit is no longer available as of 2026. Some local utility incentives may still apply — eligibility varies, and confirming it is the homeowner's responsibility. Westmark does not provide tax or financial advice; consult a qualified professional about your specific situation.
Ready for a written quote that includes solar integration?
Tell us about your project and we'll send a detailed quote covering your full roof replacement with GAF Timberline Solar.
Built-In vs Bolted-On
Why Solar Built Into Your Roof Beats Rack-Mounted Panels
Westmark only installs solar built into your roof — as part of a full roof replacement using GAF Timberline Solar. Here's how that compares to the typical bolted-on approach.
Westmark
Built-In Solar
- Built into the roof
- No racks
- One contractor
- Clean, low-profile design
Typical Approach
Traditional Solar
- Mounted panels
- Multiple contractors
- Visible hardware
- More failure points
GAF Timberline Solar
Integrated — Westmark
Traditional Solar Panels
Rack-Mounted (third-party)
Specifications and warranty terms vary by GAF product line and project scope. GAF Timberline Solar is offered by Westmark exclusively as part of a full roof replacement.
Full Roof Replacements | Solar Integration — done right.
Start with a roofing estimate. We'll walk you through a full GAF roof replacement with integrated GAF Timberline Solar.
Get an instant budget estimate in about 60 seconds using aerial roof data — no appointment or sales call required.