20% Off Fall Special
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Is your basement damp, musty, or has it been prone to flooding in the past? Modern Masonry's basement waterproofing solutions can help. We keep Seattle, WA homes dry and safe from water damage. Our services include:
Interior waterproofing
Exterior waterproofing
French drain installation
Sump pump installation and repair
Crack injection and sealing
Basement wall repair
Mold remediation
Protect your home's foundation from water issues. Contact us for a custom waterproofing plan that will keep your basement dry for years.

We tailor our masonry services to fit your needs and budget. Get a no-obligation quote for your project today.
Ignoring basement moisture can end up leading to a more serious problem. You might want to consider our waterproofing services if you notice:
Constant dampness or humidity
Water stains on walls or floors
Mold or mildew growth
Musty smells
White, powdery substance on walls
Peeling paint or wallpaper
Warped or rotting wood
Fixing these issues quickly can prevent costly damage and keep your family healthy. Our team at Modern Masonry will check your basement and create the best waterproofing plan for you.
⭐ ⭐ ⭐ ⭐ ⭐
This company does a great job, I'm very happy with the hard
11/22/2025
⭐ ⭐ ⭐ ⭐ ⭐
really good job repairing my chimney thank you Patrick and team
11/21/2025
Modern Masonry is the go-to choice for basement waterproofing in Seattle, WA. Here's why homeowners trust us:
Over 30 years of experience
Fully licensed and insured
Custom solutions for each basement
Free estimates
Local, family-owned business
Guaranteed satisfaction
Manufacturer warranties available
Discounts for seniors
20% off for new customers
We're dedicated to providing excellent work and customer service. Our team uses the newest waterproofing methods to ensure your basement stays dry and protected.
Protect your home's value and your peace of mind from basement water issues. Modern Masonry offers lasting solutions for your waterproofing needs. We serve Seattle, WA and nearby areas, with flexible scheduling including after-hours appointments. Contact us today to book your free estimate and start the journey to a dry, healthy basement.




HOW CAN I TELL IF MY BASEMENT NEEDS WATERPROOFING ?
Your basement might need waterproofing if you see damp spots, water stains, mold, or smell musty odors. Other signs include white powder on walls, peeling paint, or warped wood. If you notice these issues, it's best to have a professional check your basement.
WHAT METHODS DOES MODERN MASONRY USE FOR BASEMENT WATERPROOFING?
Modern Masonry uses various methods to waterproof basements. We offer interior and exterior waterproofing, French drain installation, sump pump work, crack sealing, and wall repair. We look at each basement's specific needs to choose the best mix of techniques.
HOW LONG DOES BASEMENT WATERPROOFING TYPICALLY LAST ?
The lifespan of basement waterproofing depends on the methods used, material quality, and upkeep. Usually, professional waterproofing can last 10 to 20 years or more. At Modern Masonry, we use quality materials and methods for long-lasting results. We also offer manufacturer warranties for extra protection.
Serving the Seattle, WA and surrounding areas. Modern Masonry specializes in roofing solutions, basement waterproofing and chimney, foundation, and masonry services. Manufacturer warranties honored. Over 30 years of experience. New customers save 20%. Senior discounts. Free estimates on customizable solutions.
Seattle, WA and the surrounding area
1420 5th Ave
Seattle, WA 98101
Mon - Sun12:00 am - 11:59 pm
After Hours by Appointment
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