- Home
- Services
- Basement Waterproofing
Basement Waterproofing in Ottawa
Waterproofing starts with understanding where the water is coming from. We assess first, then recommend.
Overview
Basement Drainage: what you should know
Basement waterproofing is not a single product. It is a set of approaches, from interior membranes and drainage to exterior foundation work, chosen according to how water is reaching the basement.
Treating the symptom without identifying the source can lead to repeat problems, so every waterproofing recommendation we make begins with an assessment.
Common reasons homeowners ask about waterproofing
- Water seeping through walls or at the floor joint
- Leaks that appear during heavy rain or spring thaw
- A musty smell or ongoing dampness in the basement
- Plans to finish the basement and wanting to protect the space
- Previous waterproofing that no longer seems to be working
Solutions
Waterproofing approaches we can discuss
Interior waterproofing
Membranes, coatings and interior drainage that manage water reaching the inside of the foundation. Often suitable where exterior access is limited.
Exterior waterproofing
Excavation along the foundation to apply a membrane and improve drainage at the footing. Addresses water at the outside face of the wall.
Targeted repairs
Where water enters at a specific crack, tie or penetration, a localized repair may be more appropriate than a full system.
Moisture protection
Where dampness rather than active leaking is the issue, we look at whether moisture control measures are a better fit.
Illustrative image.
The assessment
How we assess your basement
01
Describe the problem
Share where water appears and any photos you have.
02
Assess the source
We look at walls, floor, grading, downspouts and drainage.
03
Compare interior and exterior options
We explain the trade-offs for your home and site.
04
Recommend a suitable approach
A clear, practical recommendation based on what we found.
Why homeowners call us
Proven basement waterproofing tailored for Ottawa homes
01
Local foundation specialists
Built specifically to protect Ottawa properties against heavy rainfall, rapid spring thaws, and harsh seasonal frost cycles.
02
In-depth moisture diagnosis
We pinpoint the exact source of water intrusion—whether through foundation cracks, hydro-static pressure, or wall seepage—before recommending action.
03
Transparent & clear solutions
We break down our findings, explain structural risks, and present honest repair choices without sales pressure or confusing technical terms.
04
Complete interior & exterior protection
From heavy-duty interior vapor barriers and drainage systems to exterior waterproof membranes and foundation crack repair, we secure your basement inside and out.
FAQ
Basement Waterproofing questions
Can’t find your question? Call us and we’ll talk it through.
Is interior or exterior waterproofing better?
Neither is better in every case. Exterior work addresses water at the outside of the wall, while interior systems manage water that reaches the inside. Site access, the source of water and budget all influence which is more suitable.
Can waterproofing fix high basement humidity?
Not always. Humidity can come from condensation or indoor sources rather than water entering through the foundation. We check for signs of infiltration before recommending waterproofing.
Do you need to see the basement in person?
Yes. Photos help us understand the problem, but a reliable recommendation needs an on-site look at the walls, floor and the outside of the house.
Can you waterproof a basement in winter?
Interior work can often go ahead in colder months. Exterior excavation depends on frozen ground, weather and site conditions.
Related services
Often considered alongside this service
Exterior Foundation Waterproofing & Drainage
Excavation, membrane and footing drainage work that addresses water at the outside of the foundation wall.
Basement Drainage
Interior perimeter drainage that collects water at the foundation and directs it away from your living space.
Basement Moisture Control
Identifying whether dampness comes from condensation, humidity or water infiltration, then recommending what fits.
Concerned About Water in Your Basement?
Tell us what you’re seeing and we’ll arrange an assessment to identify the likely cause.
Contact Info
Phone
613-857-4746
capitalcitypave@gmail.com
Service Area
403 Bank Street Ottawa, ON K2P 1Y6
Our Promise
No deposit required. You pay only when the project is complete and you’re 100% satisfied.
Waterproofing · Drainage · Foundation Repairs. A basement solutions division of Capital City Paving & Masonry.
Basement Services
Capital City Paving & Masonry
© 2026 Capital City Paving & Masonry. All rights reserved.Design & Developed by gbltechnologies
