Quality. Integrity. Value.

SINCE 1989

Serving The Greater Toronto Area

35 Year Transferable Warranty

Written Guarantee on all work performed








Interested in what past clients think of our work?

Check out some of our customer testimonials below!

Marcus Schubert - Trinity Bellwoods, Toronto
Basement Waterproofing

We hired the Inside Guys and their team to install an (interior) perimeter drainage system in our basement. The work was performed efficiently, on schedule and with attention to detail. The spaces were segregated from the rest of the house with plastic barriers - to minimize the migration of dust - left clean between visits and spotless at the end of the project. We were extremely pleased with the end result, the pricing and their courteous attitude. I have recommended this outfit to several friends and will continue to do so - without hesitation. 

Jules Meaney - Moonraker Construction - Toronto

I own and operate a renovation company in west Toronto, and when I need waterproofing or underpinning done I only ever call The Inside Guys.
That’s because with this team I can be sure of quality work, done on time and on budget. These guys are utterly reliable, trustworthy, and really know their stuff.
The work is always done with the utmost neatness, which is the mark of true professionals and makes getting each stage of the work inspected and passed by the City hassle free.
Their years of experience in this business really shows through. I highly recommend using The Inside Guys.

Tara S. - The Annex, Toronto
Basement Waterproofing

I had significant basement drain and waterproofing work required at my home, and was referred to the Inside Guys by a local hardware store. I found them to be extremely diligent in all ways – from timeliness of meeting appointments and work timelines, to working well with the plumbers and other contractors in this project, to overall professionalism.

The job was labour intensive and extremely messy, yet I could not believe the pristine condition I found my home in after they finished each day. They were a pleasure to work with and I would not hesitate to recommend them as the quality of work, the price and the overall experience were without fault.


Steve Munday - The Junction, High Park
Basement Waterproofing

The Inside Guys did a amazing job! They came to work when they said they would and got the job done faster then I expected. Everything was perfect.
They mixed the concrete outside so there was no dust. A couple hours of jackhammering was all the noise there was. They left the place cleaner than when they started.
I've never had a problem with water in my basement since (and we have had some big storms).
They also charged me less then the originally quoted me!!
These are honest hard working family guys and I would recommend them to anyone.

Les Motyka - Toronto, ON
Basement Waterproofing

The Inside Guys came out to meet with us and to take a look at our leaking wall. They was very professional and thorough in their assessment of our situation from the beginning. They explained what was needed to be done, and how they would do the work in great detail. They were also very specific in the time that it would take and how clean the jobsite would be left everyday.

When the work began, the Inside Guys would call me outside to show me where we had cracks and how they were being repaired so we could see the progress. They drilled all of the Pin holes and repacked them with cement, they sealed the wall and installed the delta membrane to prevent future damage.

We couldn’t believe how nicely the job was done, expert workmanship from beginning to end and when they left the jobsite every day, it was in awesome shape, no garbage, everything was raked out nicely and evenly.

I have recommended Inside Guys to my cousin and two of my neighbours….all the comments were the same, ‘Wow these guys did great work, and they didn’t make a mess and left everything super clean”

I strongly recommend them and his team for your waterproofing needs!”

If you are in need of waterproofing work on your home and are looking for a quality job start to finish, give Inside Guys a call, you will be glad that you did. All the workers on the team are safe, responsible, hardworking and friendly. Their workmanship is second to none.

Lisa Doherty - Richmond Hill, ON

The Inside Guys waterproofed our basement. They were honest , provided excellent workmanship and were very clean. They didn't try to sell us what we didn't need. Originally we were told we needed a sump pump, it turned out we did not and they took it away which cut our costs down considerably. The Inside Guys are courteous and treated us with respect and integrity, which is not easy to find these days. Our overall experience was excellent!


Cathy & Dave E. - Mississauga, ON

After doing our research on waterproofing companies, we decided on the Inside Guys.  Their prices were competitive and on seeing their work we were totally impressed.  The team was quick, efficient and clean.  The work was done on the exterior of the house.  Upon completion of the work you could not tell that anything had been disrupted!  The company also offers a good warranty on their work.  I wouldn't hesitate to recommend them or use them again.

Gayle S. - Mississauga

Highly recommend Inside Guys Waterproofing! They provided excellent customer service in providing a fair quote, doing an excellent job and following-up on several occasions to ensure the job solved the water problem we had.
I also liked that they guarantee their work with a 35 yr. warranty.
It's nice to deal with a family business that are experts in their field, having been in business for 35+ years. It was a pleasure to do business with Inside Guys Waterproofing and I wouldn't hesitate to use them in future.





We will help you to avoid costly, disruptive demolition & reconstruction

Reduce or eliminate most future foundation related problems.

Inside Guys Underpinning can provide permanent, warranted solutions to foundation structural problems. Home and business owners appreciate the fact that many of these engineered repairs can be completed in a couple of days, with minimal disruption to the property.