Home / Services / Porch & cold room waterproofing
Porch & cold room waterproofing
Fix leaks into the cold room under your front porch. A common source of basement leaks in GTA homes.
Is this your problem?
Many GTA homes have a cold room under the front porch. The porch slab is its ceiling, so when the slab cracks or its waterproofing fails, water drips straight into the cold room.
- Leaks or drips in the cold room ceiling or walls
- Cracks in the porch slab or steps
- Rust stains or exposed rebar in the cold room
- A musty smell or mould in the cold room
Open up the porch
The surface is cleared and the sides of the porch are dug out.
Repair the concrete
Cracks and damaged areas in the slab are fixed.
Membrane it
Self-adhered waterproof membrane goes over the slab and down the sides.
Restore the finish
The porch surface, stone or pavers are put back.


What is a cold room?
An unheated storage room under the front porch, common in GTA homes. Its ceiling is the porch slab.
Can it be fixed from inside the cold room?
Inside sealers rarely last, because the water is coming through the slab from above. The lasting fix is waterproofing the porch itself.
Will my porch look different afterwards?
The membrane goes under the finish, so the porch can be finished to look the way it did. Discuss materials when you get your quote.
Get your porch & cold room waterproofing quote.
Send the form, or call or text a photo to 416-995-6504. We'll go over it with you and book a time for a waterproofing pro to take a look.
Calls answered 8 AM – 8 PM, Monday to Sunday. Forms sent after 8 PM get a call the next morning.
Your basement
We'll call you back to go over it.
- Basement waterproofingEvery way to keep a basement dry
- Exterior waterproofingSeal the foundation from outside
- Interior waterproofingDrainage and sump, no digging outside
- Foundation crack repairSeal leaking cracks from inside
- Weeping tile replacementNew drainage at the footing
- Sump pumps & backwater valvesFlood protection for storms
- Window well repairStop leaks around basement windows
- Flood cleanup & restorationRemove, dry out and rebuild