Mon-Sat 9:00 AM - 5:00 PM
Service Area
Leaking basement? We inspect Thornhill homes for free, diagnose the source, and fix it right — backed by warranty.
Local Expertise
Thornhill occupies a unique geographic and municipal position — straddling the Vaughan-Markham border along Yonge Street, with the Don River's west branch carving through its eastern sections. The village core around Thornhill Village and John Street features some of York Region's oldest homes, with foundations dating back 100+ years that require specialized care. West of Yonge, 1980s-90s subdivisions in Royal Orchard and Henderson were built on clay-heavy soil that has spent decades pushing against foundation walls. East of Yonge, German Mills and Thornlea sit closer to the Don River's tributaries, where water tables fluctuate sharply during rain events and spring thaw.
Neighbourhoods we serve: Thornhill Village, Royal Orchard, Henderson, Thornlea, German Mills, and surrounding areas.
Does This Sound Familiar?
These are the issues Thornhill homeowners most often call us about. If any of these match what you're seeing, we can help.
What We Fix
From hairline cracks to full exterior excavation — we handle every type of basement water problem.
Complete interior drainage systems, sealants, and sump pumps to manage water that's already entering your basement.
Learn MoreComprehensive exterior foundation protection with membranes and drainage to prevent water from reaching your basement.
Learn MoreProfessional crack injection and repair services to seal foundation cracks and prevent water intrusion.
Learn MoreReliable sump pump systems with battery backup to protect your basement from flooding and water damage.
Learn MoreProfessional weeping tile and French drain systems to redirect water away from your foundation.
Learn MorePrevent sewage backup with professional backwater valve installation — eligible for government rebates up to $1,250.
Learn MoreGovernment Rebate
Available to York Region homeowners for backwater valve installation. Thornhill spans Vaughan and Markham — we'll confirm your specific eligibility at inspection. We handle the paperwork and make sure your installation qualifies.
Common Questions
Reviews
“Outstanding job! My basement is finally dry thanks to your team. No more musty smell or moisture problems. A+ service!”
“From the initial appointment to final inspection, service was exceptional. Prompt, professional, and results exceeded expectations.”
“Professional and friendly staff. They solved our leaky basement in no time. The results were fantastic. Basement has been leak-free since the work was done.”
How It Works
We come to your Thornhill home, find the source of the problem, and tell you exactly what needs to be done.
You get a written quote with everything itemized. No hidden fees, no upselling work you don't need.
Our licensed crew does the work. Most jobs are completed in a day or two with minimal disruption to your home.
Your repair is covered by our written warranty. If water returns through the repaired area, we come back.
We also serve nearby areas:
