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Interior Basement Waterproofing in Montreal
When water enters your basement from the inside — through walls, floors, or cracks — interior basement waterproofing is the most effective and affordable solution. At Tross Construction, we provide professional interior waterproofing services across Montreal to keep your basement dry, clean, and protected all year long.
This method is ideal for homes with high humidity, minor water seepage, foundation cracks, or drainage issues that don’t require exterior excavation.
Stop Water Problems from Inside Your Basement
Interior waterproofing manages water after it enters your basement and redirects it safely away from your foundation. It is efficient, cost-effective, and can be installed year-round — even during winter.
Interior Weeping Tile System
We install perforated drainage pipes around the interior perimeter of your basement to collect and redirect water into a sump pump system.
Benefits include:
Prevents floor leaks
Stops wall seepage
Reduces hydrostatic pressure
Works even when exterior waterproofing is not possible
Vapor Barrier Wall Systems
A vapor barrier prevents moisture and dampness from spreading through basement walls.
It helps:
Stop mold growth
Improve insulation
Create a clean, finished look
We install high-quality moisture barriers designed for long-term protection.
Drainage Channels
Drainage channels collect water from the base of your walls and direct it into the interior weeping tile or sump pump.
Sump Pump Installation
A sump pump removes water before it floods your basement.
We install:
Primary sump pumps
Backup pumps
Battery-powered emergency pumps
This system protects your home during heavy rain, storms, and snowmelt.
Anti-Mold & Waterproof Coatings
Our special waterproof paints and sealants add an additional layer of protection and prevent mold from forming on walls.
When Interior Waterproofing Is the Best Choice
Interior basement waterproofing is ideal when:
Excavation is not possible
Many homes cannot be excavated due to property lines, tight spaces, or landscaping.
Your water problem is minor to moderate
Interior systems handle seepage, high humidity, and small leaks.
You need a cost-effective solution
Interior waterproofing is significantly more affordable than exterior work.
You want a dry basement quickly
Interior waterproofing can often be completed in 1–3 days.
You’re planning a basement renovation
Waterproofing the interior protects finished walls, floors, and furniture.
Signs You Need Interior Waterproofing
If you notice any of these, interior waterproofing is needed:
Moisture & Water Signs
Damp spots on walls
Water seeping from corners
Puddles after rain
Wet or stained floor edges
Air Quality Issues
Musty, moldy smell
Visible mold behind furniture
High humidity
Condensation on walls
Wall & Floor Problems
Paint peeling
Efflorescence (white salt deposits)
Surface cracks
Interior waterproofing stops these issues from getting worse and protects your basement long-term.
Our Interior Basement Waterproofing Process
We follow a comprehensive method designed to deliver reliable, long-lasting results.
1. Inspection & Moisture Diagnosis
We identify the source of leaks using:
Foundation analysis
Moisture meters
Drainage evaluation
Crack inspection
2. Waterproofing Plan
We recommend the best solutions based on:
Water entry points
Foundation type
Basement usage
Budget
3. Installation of Interior Systems
This may include:
Interior weeping tile
Drainage channels
Vapor barriers
Crack injections
4. Finishing & Testing
We test the system, seal all moisture points, and ensure your basement is dry.
5. Cleanup & Final Review
Your space is left clean, organized, and fully waterproofed.
Why Choose Tross Construction for Interior Basement Waterproofing?
Waterproofing Specialists
We understand Montreal’s unique soil, drainage, and weather challenges.
Long-Term Protection
We use top-quality materials and proven systems designed for durability.
Quick Installation
Most interior waterproofing projects are completed in just a few days.
Affordable & Effective
Interior solutions provide strong results without the cost of excavation.
Mold Prevention Experts
We use vapor barriers, drainage systems, and coatings that reduce mold risks.
Honest, Transparent Pricing
You receive a clear estimate with no hidden charges.
Additional Waterproofing Solutions We Offer
Crack Injection Repair
Using epoxy or polyurethane to seal foundation cracks from inside.
Dehumidifier Installation
Removes excess moisture and prevents mold.
Thermal Insulation & Vapor Barriers
Keeps your basement warm and dry.
Interior Drain Tile Replacement
We replace old, clogged interior drains to restore performance.
Frequently Asked Questions
Interior systems stop water after it enters, but do not address exterior soil pressure.
For severe leaks, exterior waterproofing may also be needed.
Most projects take 1–3 days.
Yes — it’s ideal for winter because no exterior digging is necessary.
Yes. It protects your finished basement walls from hidden moisture.
Yes — we offer warranty options depending on the system installed.
Keep Your Basement Dry with Interior Waterproofing
Interior waterproofing is one of the most effective ways to eliminate basement moisture quickly and affordably. At Tross Construction, we provide reliable solutions that protect your home from leaks, mold, and humid conditions.
Contact us for a free inspection
Proudly serving Montreal and surrounding regions
Strength you can see. Quality you can trust.
Licence RBQ #5841923501
Tross Construction Inc. is a company specializing in interior and exterior renovation projects, masonry, concrete and everything related to finishing work.
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