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Foundation Crack Injection After a Basement Flood: Does Mississauga's Rebate Cover It?

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Yes, in many cases. Mississauga's Flood Resilience Rebate lists urethane injections and hydraulic cement, and pays 50% of the cost up to $3,000 when your home was flood-damaged on or after July 8, 2013.

If water came through a crack in your basement wall or floor during one of the storms, sealing that crack is probably the first repair on your list. Most homeowners do not realize the City has an eligible-materials list that names the products a crack sealer actually uses. This page walks through what is on the list, who qualifies, and what to have in hand before the crack is closed up.

What the City's list actually names

The City's Flood Resilience Rebate page lists only a handful of headline measures, such as water-resilient wall and floor construction, raised utility hardware, moisture alarms, exterior grading, exterior damp-proofing and corrugated steel window wells. Crack repair is not spelled out there. It shows up in the separate "Flood Resilient Materials" guide that Credit Valley Conservation prepared for the City (version 1, April 2025).

That guide says cracks in foundation walls and basement floors can be sealed from the inside or the outside, and that asphaltic hardening liquid, hydraulic cement, urethane injections or silicone sealants can be used. Its "List of Eligible Materials" then repeats hydraulic cement, asphaltic hardening liquid, urethane injections and silicone sealant, and says the cost of materials and labour for installation are eligible for reimbursement.

Epoxy injection is not on that list. If a contractor wants to use epoxy for a structural crack, ask the City whether that product qualifies before you agree to it.

Who qualifies

According to the City's rebate page, you must:

The rebate is 50% of eligible costs, to a maximum of $3,000. Damage to a separate shed or accessory building does not count, and neither do common elements in a condo. If the work falls under a condo board's authority, the City asks for a board authorization letter.

The paperwork, before the work

The application asks for:

  1. a copy of your tax bill showing your name;
  2. proof the home flooded: an insurance claim, correspondence with 311 or a Councillor's office, cleanup invoices or quotes, or date-stamped photos with their metadata intact;
  3. original material receipts, or an invoice that shows the work address, the contractor's name and licence number, a cost breakdown and the total paid in full;
  4. photos of the finished work.

Two habits save trouble. Take photos of the crack and the wet wall before anyone touches it, and ask for an invoice that separates labour from materials. The City says labour is eligible only if a valid contractor did it: someone qualified in their skilled trade in Ontario who holds any required licence. You can check a contractor with 311, or follow our guide to checking a contractor's licence in Ontario.

Pre-approval is the open question

The City's sump pump rebate is different: since February 2025 it needs pre-approval before installation. The Flood Resilience Rebate page we read says nothing either way about approval before work starts, and it says the work must be complete and paid for before you apply. Do not assume a gap means permission. A short email to floodrebate@mississauga.ca (subject line "Inquiry") before you book is cheap insurance. The City can also inspect on reasonable notice, and refusing access can sink the application.

What crack injection typically costs

Published estimates from Toronto-area foundation contractors run roughly $500 to $1,500 per crack for interior injection, with active leaks, long cracks and difficult access pushing the price up. Digging outside to reach a crack costs several times more. These are general market estimates, not quotes, and they vary by contractor. Ask whether a quote is labour only or includes materials, and whether it is plus HST, because the rebate invoice needs the breakdown.

At 50% back, a $1,200 injection would return up to $600 if it qualifies. To reach the full $3,000 you would need about $6,000 of eligible work in total, often by pairing the crack repair with other measures on the list.

When injection is the wrong first step

Sealing a crack stops the symptom. If the crack is wider at one end, stair-stepped in block, or the wall is bowing, that points to movement and a structural engineer should look at it before anyone injects anything. If water comes up where the floor meets the wall, the cause is often drainage, so check the sump, the downspouts and the grading first. And if the roof or eavestrough is what let water in, call a roofer for that: Rhodex can help fix the drywall or finishes inside afterward.

Quick answers

Does Mississauga's flood rebate cover foundation crack injection?

Yes, the City's eligible materials list names urethane injections, hydraulic cement, asphaltic hardening liquid and silicone sealant. You still have to meet the flood-damage and owner rules.

How much is the Flood Resilience Rebate in Mississauga?

The City pays 50% of eligible costs, up to $3,000. It covers materials, contractor labour and tax. You would need to spend $6,000 to reach the maximum.

Who can apply for the Flood Resilience Rebate?

You must be the individual registered owner of a detached, semi-detached, duplex or townhouse in Mississauga, with flood damage from a rainfall event on or after July 8, 2013.

What paperwork does the City ask for?

A tax bill, proof of the flooding, a paid invoice or receipts, and photos of the work. The invoice must show the contractor's name and licence number.

Do I need approval before the crack is injected?

The City's rebate page does not say. Email floodrebate@mississauga.ca before you book, so you know whether work started early could be refused.

Before you book anyone

Photograph the damage, confirm your home meets the flood and ownership rules, ask the City about pre-approval and epoxy, and get a written invoice format that matches what the application needs. If you want a plumber or handyman to look at the wall and give you a fixed price, Rhodex can quote it in writing before work starts, with $5M liability insurance behind the work.

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