Your Trusted Siding, Roofing, Decking, Windows, Exterior Contractor in Sumas, WA

Trusted for Over 450 verified 5 star reviews and 1750 + jobs

Alpine Siding Pros proudly serves Sumas, WA with professional roofing, siding, window, and decking solutions. With two decades of Pacific Northwest expertise, we deliver weather-resistant installations, precision waterproofing, and courtesy rot repair. Rely on clear estimates, responsive communication, and craftsmanship built to withstand Sumas’s border-valley climate and seasonal weather swings.

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Why Choose us

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Our top-rated siding company specializes in James Hardie siding, siding replacement, and exterior upgrades for lasting durability and curb appeal.

James Hardie’s Highest Performing Contractor for Over 2 Decades – With Hundreds of Jobs to Prove it!
Lead Certified & Tyvek Certified
Backed by a 25-Year Workmanship Warranty – Best in Town GUARANTEED!
The ONLY Exterior Company in Whatcom County with a Full Showroom
Proud Partner of Hover – Bringing Your Home’s Vision to Life with 3D Design Tools
A Perfect 5-Star Rating on BBB, Google, Yelp, GuildQuality, Angi & More
We Support Local – Volunteering, Charity Work & Investing in Our Community

A REPUTATION OF EXPERIENCE, QUALITY, AND TRUST

Washingtons Elite Preferred James Hardie Siding Contractor
Serving Whatcom and surrounding counties for over 22 years!

Top-Rated Siding Company Bellingham, WA
Siding Contractors Bellingham

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Our Services

Valley-Ready Roofing in Sumas

Alpine Siding Pros installs heavy-duty asphalt shingles and standing-seam metal roofs engineered for Sumas’s high rainfall and occasional snowfall. Our certified crews perform a thorough roof-deck inspection, apply marine-grade underlayment, and seal all flashings with corrosion-resistant sealants to prevent leaks, ice dams, and wind-driven moisture.

Each project begins with a structural assessment to uncover hidden rot or framing damage—courtesy rot repair is offered at a nominal fee. Backed by manufacturer warranties and our on-time completion guarantee, your new roof will protect your home and enhance its curb appeal for decades.

All-Weather Siding Installations

Refresh your Sumas home with low-maintenance vinyl, fiber cement, or engineered wood siding. Our installers achieve laser-precise trim alignment, install continuous waterproofing membranes behind every panel, and expertly caulk seams to block moisture, drafts, and pests in the valley environment.

Starting with substrate and sheathing inspections, we pair premium cladding materials with advanced moisture-barrier techniques. The result is an energy-efficient, mold-resistant exterior that endures UV exposure and temperature swings—boosting both durability and your home’s aesthetic.

Energy-Efficient Window Upgrades

Alpine Siding Pros installs ENERGY STAR®-rated double- and triple-pane vinyl or fiberglass windows designed for Sumas’s variable climate. Our precise measurements and advanced sealing methods eliminate drafts, reduce condensation, and improve thermal performance year-round.

We evaluate existing frames and flashing before carefully removing old units, then complete a meticulous cleanup. Enjoy lower utility bills, superior soundproofing from border-traffic noise, and clear views of the surrounding foothills.

Custom Deck Design & Construction

Transform your outdoor living space with a bespoke deck from Alpine Siding Pros. We design and build decks using pressure-treated lumber, high-performance composite boards, or marine-grade hardwoods rated for local moisture conditions. Our crews follow county code for proper joist spacing, ledger attachment, and drainage.

From simple platform decks to multi-level entertainment areas, we select corrosion-resistant fasteners and low-maintenance finishes. The result is a safe, durable deck that enhances your Sumas home’s value and provides years of enjoyment.

Why Alpine Siding Pros Thrives in Sumas

Alpine Siding Pros combines 20 years of Pacific Northwest expertise with a deep understanding of Sumas’s border-valley microclimate and rural-town character. Our Bellingham-based team partners with Washington suppliers to source premium roofing, siding, window, and decking materials—ensuring rapid delivery and local support. We provide transparent bids, manufacturer warranties, and neighborhood-focused service to complete every project on time, on budget, and built to last.

Mastering the Building Envelope

We treat your home’s exterior as a unified system—coordinating roofing, siding, windows, and decking to block moisture and air infiltration. Our crews install high-performance vapor barriers, precision flashings, and premium sealants at every junction. By inspecting and reinforcing sheathing and framing, we prevent rot and mold before they start, maximizing energy efficiency and indoor comfort.

Transparent Pricing & Courtesy Rot Repair

Integrity is our hallmark. At Alpine Siding Pros, rot repair is quoted separately as a courtesy—charged only when hidden decay is uncovered. Every estimate line-items materials, labor, and any remediation so Sumas homeowners never face surprise fees. This transparency lets you budget confidently and ensures your project stays on schedule and on budget without compromise.

Local Partnerships & Community Commitment

As a locally owned Bellingham contractor serving Sumas, we partner with Washington-state manufacturers and suppliers—supporting the regional economy while ensuring premium material access. Our crew lives in nearby communities, understands local codes and permit processes, and respects Sumas’s small-town character. From minor repairs to full recladding, we communicate openly, adhere to timelines, and treat your property with care—building lasting relationships one home at a time.