The lowest bid — and the most accurate.
A customer's words, not ours. Roof replacement and repair quoted honestly by Wilson — no upselling, scheduled in days not weeks, documented with photos from tear-off to cleanup.
Replace. Repair. Protect.
Every kind of residential roof — plus the gutters, moss and flashing details that keep a King County roof dry.
Roof replacement
Full tear-offs and new CertainTeed architectural-shingle roofs — decking repaired, underlayment down, skylights and chimneys flashed right.
- CertainTeed ShingleMaster™
- Tear-off & re-deck
- Skylight & chimney flashing
Repairs & leaks
Storm damage, active leaks and aging vents — diagnosed accurately and fixed for what it actually needs. "No upselling" is a customer quote.
- Emergency leak repair
- Storm damage
- Vents & flashing
Flat roofs, gutters & moss
TPO membrane for flat and low-slope roofs, new gutters, gutter cleaning and moss treatment — the full protective shell of the house.
- TPO membrane
- Gutter install & cleaning
- Moss treatment
Three steps, no runaround.
Free inspection, honest bid
Call or use the chat on this page. Wilson inspects the roof and bids what it actually needs — customers call it the lowest bid AND the most accurate.
Scheduled in days
One customer had a leaking 50-year-old roof replaced within days of the estimate — and if the deck hides surprises, Wilson works the options through with you honestly.
Documented & done
Work photographed to document what was done, excellent communication start to finish, and a site left clean — it's all in the reviews.
Certified, insured, verifiable.
Not marketing claims — registrations you can look up yourself.
Factory-certified installer — the credential CertainTeed requires before backing its strongest shingle warranties.
Manufacturer certifiedWashington state contractor registration, active and current — verify it in seconds at L&I.
WA #MASSMML832MJFull liability coverage on every job — your home is protected the whole time our crew is on it.
Fully insuredCertified for safe work practices on older homes — it matters on any house built before 1978.
#NAT-F310484-1Backed by our leak-free guarantee.
500+ projects since 2016, and every replacement stands behind the same promise: a roof that keeps the water out — or we come back.
Real jobs, real photos.
Every photo here is Mass & Mass's own work, straight from their Google profile and job sites.
4.8 stars — and they all mention Wilson.
Homeowners keep saying the same things — honest bids, fast scheduling, no upselling, and communication from start to finish.
“They had the lowest bid, but also the most accurate as to the service needed; no upselling like most of their competitors. They showed up promptly and efficiently got the work done with pictures to document the work.”
“Wilson from Mass & Mass came out to inspect it, gave me a competitive estimate, and had the roof replacement scheduled just a few days later. Then his crew showed up — and honestly, it felt like a SWAT team had descended on my house in the best possible way.”
“He was extremely responsive and addressed several concerns I had. I am very pleased with my new roof, gutters, and chimney. The quality of the work was well worth every reasonable cent.”
“Wilson made a very honest impression to me and had a reasonable price. When issues with my roofing deck came up, Wilson worked with me to come up with an alternative roofing material.”
When you call, you're talking to Wilson.
Mass & Mass is Wilson Massambani's company — an owner-led crew serving Seattle and King County since 2016, CertainTeed ShingleMaster™ certified, licensed and bonded (WA #MASSMML832MJ). Wilson inspects the roof himself, bids what it actually needs, and his crew moves fast — one customer compared them to a SWAT team, in the best possible way. The work gets photographed and explained, and if the deck hides surprises, you get options and a straight answer, not a change-order ambush.
Straight answers.
What does a new roof cost?
Every roof is different, so we don't guess — Wilson inspects it free and bids exactly what it needs. Customers call it "the lowest bid, but also the most accurate," with no upselling.
How fast can you start?
Fast. One customer with a leaking 50-year-old roof had the replacement scheduled just a few days after the estimate — and the crew works quickly once it's on.
What if the wood under my roof is damaged?
It happens on older roofs. Decking gets repaired or replaced before anything goes on top, and if surprises turn up, Wilson walks you through the options honestly — no change-order ambush.
Do you do gutters and moss too?
Yes — gutter installation and cleaning, moss treatment, and TPO membrane for flat roofs. The whole protective shell of the house, one crew.
What areas do you serve?
Seattle, Kirkland, Bellevue, Redmond and all of King County.
Get your roof looked at before the next storm.
Call for a free inspection, or start a chat and we'll get Wilson out to take a look.