About Mass & Mass LLC

Mass & Mass LLC is a licensed Washington State roofing contractor based in Redmond, serving the Greater Seattle area. We install and repair asphalt, metal, and flat roofs, plus siding, gutters, exterior painting and water-damage repairs including drywall and interior painting for residential and small-commercial properties.

Local people. Careful work.

A Redmond company, built on taking care of homes.

Founded by Wilson Massambani in 2016, Mass & Mass serves homeowners across the Seattle area. Roofing, gutter replacement, siding and exterior painting begin with understanding the property and agreeing on a written scope.

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Our story

Mass & Mass LLC was founded in 2016 by Wilson Massambani. The company began with roof cleaning and maintenance work — moss removal, gutter clearing, and the kind of preventive upkeep that Pacific Northwest roofs need to survive years of rain, shade, and debris. Working on roof after roof across the Eastside, we saw first-hand how small, ignored problems turn into failed decking, interior leaks, and premature replacements. That experience shaped how we work today: we would rather catch a problem early and fix it honestly than sell a homeowner more than they need.

Over the years that started with cleaning and maintenance, Mass & Mass grew into a full-service roofing contractor. Today we handle everything from a single leak repair to a complete tear-off and re-roof, along with storm and wind damage restoration, metal roofing, gutters, siding, and exterior painting. We remain a Redmond-based, owner-operated company — the same person who answers the phone is accountable for the work that gets done on your roof.

What we do

Roofing, gutter replacement, siding and exterior painting, plus water-damage repairs involving roofing, siding, drywall and interior or exterior painting.

We are a full-service roofing and exterior contractor for homes and small-commercial properties across the Seattle Eastside and Puget Sound region. Whether you need an emergency tarp after a windstorm, a straightforward shingle repair, a new standing-seam metal roof, or a complete asphalt-shingle replacement with project-specific written warranty terms, every project starts with a discussion of your needs and a written scope of work so you know exactly what you are paying for.

• Roof Replacement
• Roof Repair
• Water-Damage Repairs
• Emergency Roof Repair
• Roof Inspection
• Roof Maintenance
• Metal Roofing
• Commercial Roofing
• Storm Damage Repair
• Moss Removal
• Gutter Replacement & Installation
• Skylight Installation
• Siding
• Exterior Painting

Water-damage repairs, inside and out

Water damage can affect more than one part of a home. Our water-damage repair service brings roofing, siding, damaged drywall and painting into a coordinated written scope. We discuss the affected areas, repair sequence and finishes with you before work begins.

Licensing & credentials

Mass & Mass LLC is licensed, bonded, and insured in Washington State, and we hold manufacturer and safety certifications that not every roofer carries. As a CertainTeed ShingleMaster™ certified contractor, we can install CertainTeed roofing systems with warranty terms reviewed for the selected system. We are also an EPA Lead-Safe Certified Firm, which matters on the many older Puget Sound homes built before 1978. You can review the details on our certifications page.

Contractor License

MASSMML832MJ — Washington State Department of Labor & Industries (verify)

Manufacturer Certification

CertainTeed ShingleMaster™ installer credential

Safety Certification

EPA Lead-Safe Certified Firm — NAT-F310484-1

Where we work

We are based in Redmond and serve the greater Seattle Eastside and Puget Sound region across King and Snohomish counties. Our regular service area includes Redmond, Bellevue, Kirkland, Bothell, Sammamish, Issaquah, Renton, Kent, Auburn, Federal Way, Tacoma, Lynnwood, Edmonds, Shoreline, Mercer Island, Newcastle, Woodinville, Marysville, Everett, and Seattle. If your home is nearby but not on that list, call us — we cover much of the surrounding region and are happy to confirm we can reach you.

Hours

• Monday–Friday: 07:00–18:00
• Saturday: 07:00–12:00
• Sunday: 09:00–14:00

Our business details

Our legal business name is Mass & Mass LLC. Some established profiles use Mass & Mass Roofing and Repairs. Our main public phone is (425) 435-5800, and our Washington contractor registration is MASSMML832MJ.

Explore our existing HomeAdvisor profile, BBB business profile and customer reviews. For current registration details, search our business name or registration number using Washington L&I Verify.

How to reach us