General Contractors

What we do

We provide high-quality Roofing contractors to hand all replacement, repairs, and roof Cleaning services to residential property owners. We are dedicated to creating a winning customer experience through the highest quality craftsmanship, technology, and by providing transparency throughout the entire process.

Our History

Our history started with our CEO and Founder Wilson Antonio Massambani. Over 7 years ago he started his journey in professional construction with roof cleaning and maintenance.  Today Mass & Mass Kirkland Roofing Contractors is a certified roof builder with over 5 years experience.

Who we are

  • We’re Transparent
  • We’re Committed to Quality and Value
  • We’re Experienced
  • Serving Kirkland, WA and surrounding areas


I was very pleased with Mass & Mass Kirkland Roofing Contractors. They were very professional, kind, on time and clear with their communication. I would recommend them to anyone needing help with their roof.

Alana H.Seattle, WA

Wilson was thorough in his evaluation of my roof to identify possible causes of the leak. Mass & Mass Kirkland Roofing Contractors also pointed out problems with the original roof installation that are causing problems now. They did not try to sell me on a complete roof replacement as other contractors had done. I found Wilson trustworthy and fair with his pricing. He even offered to do additional work that I told him about and provided a better price than other quotes for that work. His crew was prompt, courteous, worked fast, did excellent work and took time to clean up everything.

Steve G.Snohomish, WA

When it comes to home repairs - like a roof repair - I'm always a bit squeamish about trusting a contractor to quote me honest prices for the honest amount of work that needs to be done. Mass & Mass was an excellent recommendation by Wilson came out to my home in Bothell and assessed my roof that was needing repairs to the ventilation hoods and other misc. repairs. Wilson not only gave me a fair quote, but was very honest with me about what he assessed (which I already knew from a previous inspection). That told me he was up front honest and immediately built trust with me.
He sent out his crew over a 3 day period because of the natural order of the work I requested and his crew was on time, reliable and did a top notch job on my home. It gave me a great feeling to know my house was now rock-solid in protection against leaks and the upcoming winter season. I cannot thank Mass & Mass enough for the excellent work they did for what I thought was a fair price. These guys are EXCELLENT! I'll request them again without any reservation for future work I have planned.

Charles C.Bothell, WA

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M: (425) 435-5800

©2021 Mass & Mass Kirkland General Contractors

Service Area

Mass & Mass Roofing Services – Repair – New Roofing – Kirkland, Seattle, Tacoma, Bellevue, Kent, Everett, Renton, Bellingham, Mill Creek, Lynnwood, Shoreline, Cottage Lake, Sammamish, Mercer Island, Redmond, Everett, Monroe, Duvall


Choden Königsmark
Choden Königsmark
We hired Mass and Mass roofing after talking to many roofers. As a home owner, I was not feeling very confident because many roofers told me different things. Wilson made a very honest impression to me and had a reasonable price. He had good reviews. When the roofing project started, I was first shocked because there were issues with my roofing deck and it had to be fully replaced. Wilson worked with me to come up with an alternative roofing material and some ways that we can keep the costs limited - the overall project cost a few thousand more, but overall I think it was fair because there were a few unexpected work items. He paid attention to quality and solving the problem correctly - this is really important I think.
Ross Kinyon
Ross Kinyon
We hired Mass & Mass LLC to remove old shingles and replace with new ones. We selected this company to give us a bid based on the reviews we read describing Wilson's honesty, integrity, high quality of work and reasonable prices. We are very pleased that we hired this company. Wilson worked with us to accommodate my work schedule. He put the type of shingles we wanted, the best underlayment for this type of shingle, high quality metal flashings and drip edge everywhere. He also replaced old plastic vents with metal ones and replaced our skylight. He installed the correct type of roof vent for our range hood in place of a regular attic vent we had, and replaced some damaged wood. The crew accomplished the project in two days, they had to reschedule once due to weather. The crew was highly skilled and worked hard to do a good job, they left the area around the house clean, did not damage anything. The cost was very reasonable and we paid exactly what was quoted. Thank you, Mass & Mass LLC!
Quick, efficient, friendly, affordable, quality work. I highly recommend!
Chen Rui
Chen Rui
This is a preliminary review for the guys. Very responsive. Came out and did an estimate for my roof leak on the same day I called. The impression is good. I will update the review if I continue finish the work with them.
Patricia OBrien
Patricia OBrien
Good folks to work with, timely and know their work. I would highly recommend.