Window Services for Bellingham
+ NW Washington

Elevate your home’s performance with professional window services from Topside Roofing & Siding. Proudly serving Bellingham, Ferndale, Lynden, Blaine, Mount Vernon, Burlington, and Anacortes, we specialize in energy-efficient window replacements that withstand the unique elements of the Pacific Northwest. From modern architectural upgrades to classic, durable styles, our team ensures a perfect fit, maximum insulation, and a stunning finish that lasts for decades.

Get Started today

Why Upgrade Your Windows?

The Topside Advantage: High-Performance Window Upgrades Why do Bellingham homeowners choose Topside for window replacements? Because we combine modern aesthetics with trusted PNW durability. Whether you are looking for energy-efficient vinyl, classic wood-clad, or high-durability composites, we provide options that offer:

  • New windows help regulate your home’s internal temperature by minimizing heat loss in the winter and reducing heat gain in the summer. This improved energy efficiency can lead to significant savings on your monthly utility bills.

  • Upgraded windows are designed with tighter seals and advanced materials that eliminate unwanted drafts. They also serve as a sound barrier, making your home noticeably quieter by reducing street and neighborhood noise.

  • Modern window options come in a variety of frame finishes, grid patterns, and designs to match any home exterior. Installing new windows can instantly refresh your home’s look and boost its overall aesthetic appeal.

  • New windows are often larger and more strategically placed to maximize sunlight, creating brighter and more inviting interiors. Their modern appearance and energy efficiency features can also raise your property’s resale value.

Exterior view of a house with large glass windows, a wooden deck, and a textured white wall.
35 years as the best roofing company in bellingham
A red outline of a thumbs-up gesture, symbolizing approval or like.
A red badge with a scalloped edge displaying the text '#1' in bold white letters.
Red circle with a white background containing the letter A and a plus sign, indicating blood type A positive.

#1 Consumer Choice in the PNW

A+ Ratings on the BBB

Over 10k Satisfied Customers

35+ Years in Business

  • PNW Window Replacement

    Replacement

    We remove outdated, inefficient windows and replace them with modern, energy-efficient models. This upgrade improves insulation, reduces energy bills, and enhances your home's overall comfort and value.

  • PNW Window Installation

    Installation

    We install new construction windows with precision, ensuring proper sealing and integration into the building structure. Our weatherproofing techniques protect against moisture, drafts, and long-term damage, delivering lasting performance and efficiency.

A black, three-dimensional geometric shape consisting of interconnected rectangular blocks.

HEARTH MONTHLY PAYMENT OPTIONS

60-second pre-qualification. Does not affect credit score.

Learn More

Trusted Window Installers Serving Bellingham Since 1999

Experience matters when it comes to the thermal envelope of your home. At Topside Roofing & Siding, our 25-year legacy is built on a foundation of precision and peace of mind. Our veteran crews bring a level of craftsmanship to every installation that newer companies simply can’t match. For homeowners from Anacortes to Lynden, our name is synonymous with lasting performance and windows that stand the test of time.

Schedule your free estimate
Empty room with large windows, white walls, hardwood floors, and brown woven blinds.

Our Window Brands

We carry trusted window manufacturers known for innovation, performance, and beauty

Logo of the International Council of Shopping Centers featuring a stylized yellow rose next to black text.
Milgard logo with red and black text that reads 'Milgard Windows and Doors'
Andersen logo with orange, black, and white geometric shapes above the text 'ANDERSEN' in black capital letters.

Bellingham’s Expert Window Replacement & Installation

Let the light in without letting the heat out. Topside Roofing & Siding is the region’s trusted partner for reliable, energy-efficient windows that thrive in our unique climate. Serving Whatcom, Skagit, and the Islands, we help you transition from outdated, foggy glass to high-performance systems that boost your curb appeal and your peace of mind. From the first consultation to the final seal, we do windows differently.

Get Started
Bright sunlit room with large arched window and white grid windows showing a green outdoor landscape with trees and a parked car.

The Topside Guarantee: Quality Without Compromise

We put our customers at the center of every project we undertake across Bellingham and the surrounding five counties. Our legacy is built on a simple promise: trusted service and unmatched craftsmanship. Having earned regional recognition for our commitment to excellence, we take pride in delivering stress-free solutions for roofing, siding, and windows. Let our family-owned expertise protect your biggest investment.

Award badge for Bellingham Alive recognizing it as the best of the Northwest in 2024, with a silver ribbon at the bottom.
GAF Master Elite residential roofing contractor emblem with a blue diamond background, gold borders, and a red GAF logo at the top.
A diamond-shaped badge with a brown background and a beige border. It features a red GAF logo at the top, gold text reading 'PRESIDENT'S CLUB,' and two gold laurel branches beneath. The border has the text 'RESIDENTIAL' on the left side and 'AWARD WINNER' on the right side.

Additional Services

  • Bellingham Siding company

    Siding

    Fresh siding gives your home a clean, updated look while helping to lower energy bills and shield the exterior from the elements.

    Learn More
  • certainteed skylight bellingham

    Skylights

    New skylights bring in natural light, improve ventilation, and enhance your home’s design.

    Learn More
  • whatcom roofing pros

    Roofing

    Proper roofing prevents water damage and ensures a longer lifespan for your home.

    Learn More
  • bellingham custom decks

    Decks

    A well-built deck adds outdoor living space, boosts home value, and enhances overall curb appeal.

    Learn More
  • whatcom gutter services

    Gutters

    New gutters improve drainage, protect your foundation, and boost curb appeal.

    Learn More