With over 25 years of residential and commercial experience, we are the Waterproofing Experts. Specializing in Waterproofing and Project Management we are a Full Service company and have a thorough understanding of the overall construction process, excellent subcontractor relations and company resources. In addition we offer the latest technology, materials and application knowledge to complete your job at the highest standards. We provide Construction, Basement Waterproofing and Project Management services that are second to none. Our area of service is Ancaster, Burlington, Oakville, Stoney Creek, Milton, Dundas and Hamilton. National Waterproofing specialized in solving your wet basement problems either internally or externally. Our personal conviction to customer satisfaction drives our company.

Our services

external waterproofing

Excavation consists of digging out all the dirt that sits by the walls down to footer level; replacing or adding drainage pip, sealing the walls, covering that with gravel and backfilling with soil to grade level.


The floor is opened next to the outside walls, and drain pipe is installed and surrounded by gravel. the pipe can be connected to a sump pump, which discharges excess water.


Cracks in foundation walls can be caused either by the natural settlement of your home or poor construction practices, causing shrinkage in your concrete foundation wall. Various types of cracks require various solutions


+ renovation
remediating your site back to full use or we can be your renovation partner for any space.
basement renovations, bathroom renovations, kitchen renovations, home renovations specialists
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basement anatomy

National Waterproofing basement anantomy


Cracked, leaking basement walls decrease the comfort, value and safety of your home. Water will have an easier way through these cracks to create moisture problems in your basements, contributing to foundation damage, mold growth and other related issues.

DAmp spots
mold or mildew
White chaulky substance
cracks in foundation

Waterproofing for the Ancaster, Burlington, Oakville, Stoney Creek, Milton, Dundas and Hamilton Area.


"We recently had National Waterproofing fix our multiple basement leaks. They came highly recommended by our contractor, who had them fix his own family’s basement leaks. We could not be happier with all aspects of our job including a timely and accurate estimate, good communication and tidy and respectful work. Our project manager, Mark, was informative, knowledgeable and frequently checked in on the progress. The on-site team of three worked tirelessly throughout the day and sometimes into the later evening due to poor weather, while still taking time to smile and wave at our little girls watching from the back window. Our property was left clean and well prepared for the landscapers who followed. Though I am confident that I will never need their services again in this house, I would not hesitate to recommend them for any waterproofing job."
Thank you so much for everything, Derek & Heather C.