# Foundation Waterproofing Scarborough | Free Inspection

URL: https://foundationwaterproofingtoronto.ca/service-areas/scarborough/

![](/images/misc/two-crew-members-in-branded-shirts-carrying-weepin.webp)

location\_on Serving Scarborough and surrounding areas

# Foundation Waterproofing Scarborough: Basement Waterproofing, Foundation Repair and Backwater Valves From Agincourt to the Bluffs

Last updated: October 26, 2026

Foundation Waterproofing Toronto provides foundation waterproofing, basement waterproofing, foundation crack repair, weeping tile installation, and sump pump and backwater valve work across Scarborough, the City of Toronto's eastern district, with 25+ years of GTA experience. Our crews cover Agincourt, Malvern, Wexford, Birch Cliff, Cliffside, Guildwood, and West Hill, where post-war residential housing sits on clay soil that moves seasonally, the Bluffs add slope drainage problems, and sewer-backup-prone streets make backwater valves and the Toronto subsidy especially relevant.

payments Scope CAD cost anchor

Scarborough sewer backup fixes run $2,000 to $4,500 CAD for a mainline backwater valve plus $1,500 to $3,500 CAD for the sump pump (2026 pricing). The City of Toronto Basement Flooding Protection Subsidy pays up to $3,400 CAD toward these upgrades and we file the paperwork. Interior weeping tile is $8,000 to $18,000 CAD for a full perimeter, and Bluffs-area exterior work $15,000 to $35,000 CAD.

-   bolt Same-day response in Scarborough
-   workspace\_premium 25+ years across the GTA
-   gavel City of Toronto permit administration
-   payments Published CAD pricing, free inspection

calendar\_month Book Free In-Home Inspection

[/contact/ →](/contact/)

 

call Call (647) 254-5110

[tel:+16472545110 →](tel:+16472545110)

AgincourtGuildwoodBirch CliffMalvern M1B to M1X

assignment

## Diagnostic Inspection Request

Free in-home inspection across Scarborough, with a written CAD diagnostic.

**Thanks, we have your request.** A Toronto dispatcher will call you to confirm the inspection slot.

-   workspace\_premium 25+ Years Experience
-   bolt Same-Day GTA Emergency Response
-   verified\_user Written Workmanship Warranty
-   gavel OBC Part 9 Compliant
-   savings Up to $3,400 CAD Subsidy Filed

Common problems

## Common Foundation and Basement Problems We Fix

Four patterns account for most of the calls we take across the GTA. Each one has a different cause, and each one has a different CAD number attached to fixing it.

water\_damage

### Water on the floor every spring

Melt water saturates clay soil, hydrostatic pressure builds at the footing, and the cove joint lets it through. It arrives on the same weekend every year.

healing

### Cracks and efflorescence you cannot read

A crack in a foundation wall could be harmless curing shrinkage or a structural warning. Nobody has measured it and told you which.

help

### Interior or exterior, and nobody will say

Two contractors, two answers, a $20,000 CAD gap between them, and no written reasoning attached to either recommendation.

price\_check

### The feeling of being over-quoted

Some quotes are $18,000 CAD for work that needs $2,500. Without a diagnostic naming the water source, there is no way to check.

What we do here

## Foundation Waterproofing Services in Scarborough

Scarborough's residential stock is mostly 1950s and 1960s bungalows, back-splits, and semi-detached homes with full basements, plus 1970s and 1980s subdivisions and townhouses in Malvern, Agincourt, and L'Amoreaux. Clay soil movement and Bluffs-area drainage drive most foundation repair here, and several streets are sewer-backup prone, so every inspection checks the foundation wall, cove joint, floor drain, and lateral before backwater valves, weeping tile, or the Toronto subsidy are discussed.

 

![Foundation Waterproofing Toronto crew applying exterior membrane to an excavated Toronto basement wall](/images/maps/two-crew-members-in-branded-shirts-and-safety-glas.webp) Most Requested Scope

water\_damage OBC 9.13 / 9.14

### Basement Waterproofing Toronto

Interior and exterior basement waterproofing in Toronto and the GTA for homes with hydrostatic pressure, efflorescence, or spring-thaw seepage, with a free inspection and published CAD pricing.

Interior $8,000 to $18,000 CAD, exterior $4,500 to $35,000 CAD

View details arrow\_forward

[Basement Waterproofing Toronto →](/basement-waterproofing-toronto/)

 

![Foundation Waterproofing Toronto crew injecting polyurethane into a vertical foundation crack in a Toronto basement](/images/maps/two-crew-members-in-branded-shirts-injecting-polyu.webp) Same-Visit Repair

healing 3000 PSI INJECTION

### Foundation Crack Repair Toronto

Foundation crack repair in Toronto and the GTA: polyurethane and structural epoxy injection for poured concrete foundation cracks, structural versus non-structural triage, published per-crack CAD pricing, and a 10-year written workmanship warranty.

From $500 CAD per crack

View details arrow\_forward

[Foundation Crack Repair Toronto →](/foundation-crack-repair-toronto/)

 

![Foundation Waterproofing Toronto crew laying perforated PVC weeping tile in a sub-slab trench in a Toronto basement](/images/maps/two-crew-members-in-branded-shirts-laying-perforat-2.webp) Written Workmanship Warranty

tune SUB-SLAB DRAINAGE

### Interior Weeping Tile Toronto

Interior weeping tile in Toronto and the GTA: a sub-slab perimeter drain and air-gap membrane tied to a sump pump, $110 to $220 CAD per linear foot, installed in 3 to 5 days with a written workmanship warranty.

$110 to $220 CAD per linear foot

View details arrow\_forward

[Interior Weeping Tile Toronto →](/interior-weeping-tile-toronto/)

 

![Foundation Waterproofing Toronto crew fastening Delta-MS drainage board to an excavated Toronto foundation wall](/images/maps/two-crew-members-in-branded-shirts-fastening-dimpl.webp) Source Water Control

construction DELTA-MS SYSTEM

### Exterior Weeping Tile Toronto

Exterior weeping tile replacement: footing-level excavation, Delta-MS drainage board, and membrane to control water at the source.

$4,500 to $35,000 CAD by excavation scope

View details arrow\_forward

[Exterior Weeping Tile Toronto →](/exterior-weeping-tile-toronto/)

 

![Foundation Waterproofing Toronto crew lowering a cast-iron submersible sump pump into a sealed basin](/images/maps/two-crew-members-in-branded-shirts-lowering-a-subm.webp) CSA Certified

water\_pump CSA CERTIFIED

### Sump Pump Installation Toronto

CSA-certified submersible sump pump installation in Toronto and the GTA with a sealed basin, silent check valve, high-water alarm, and optional battery backup.

$1,500 to $3,500 CAD installed

View details arrow\_forward

[Sump Pump Installation Toronto →](/sump-pump-installation-toronto/)

 

![Foundation Waterproofing Toronto crew setting a mainline fullport backwater valve in an opened basement floor trench](/images/maps/two-crew-members-in-branded-shirts-setting-a-mainl.webp) Up to $3,400 CAD Subsidy

gpp\_good MAINLINE FULLPORT

### Backwater Valve Installation Toronto

Mainline backwater valve installation in Toronto and the GTA to prevent sewer backup and basement flooding, with plumbing permit, Toronto Water pre-inspection, and up to $3,400 CAD subsidy filing.

$2,000 to $4,500 CAD, up to $3,400 CAD subsidy available

View details arrow\_forward

[Backwater Valve Installation Toronto →](/backwater-valve-installation-toronto/)

 

![Foundation Waterproofing Toronto crew applying positive-side membrane to a commercial foundation wall in Toronto](/images/maps/two-crew-members-in-branded-shirts-applying-positi.webp) Scoped Contract

apartment COMMERCIAL SCOPE

### Commercial Foundation Waterproofing Toronto

Commercial foundation waterproofing in Toronto and the GTA for buildings under 15,000 sq ft: parkade slabs, elevator pits, blindside and positive-side membrane, $2M commercial general liability, and WSIB coverage on a scoped per-project contract.

$25,000 to $150,000 CAD per project

View details arrow\_forward

[Commercial Foundation Waterproofing Toronto →](/commercial-foundation-waterproofing-toronto/)

See every waterproofing scope

[/basement-waterproofing-toronto/ →](/basement-waterproofing-toronto/)

Our framework

## How Our Foundation Waterproofing Assessment Works, 5 Steps

The same five steps run on every job, from a single crack injection to a full perimeter system with City of Toronto permits.

1.  1 calendar\_month
    
    ### Booking
    
    Postal code, symptom, and photos. A same-day slot where one is open. The in-home inspection is free.
    
2.  2 search
    
    ### On-site inspection
    
    Foundation walls, floor slab, cove joint, weeping tile, downspouts and grading, moisture readings, and camera inspection.
    
3.  3 description
    
    ### Written diagnostic
    
    Fault identified, scope required, CAD cost, and an interior versus exterior recommendation with the numbers beside it.
    
4.  4 build
    
    ### Scheduled
    
    Crack injection often same-visit. Interior weeping tile within 5 to 10 business days. Exterior with excavation and City permits.
    
5.  5 verified
    
    ### Verification
    
    Water test, moisture re-check, permit close-out, and the written workmanship warranty issued in writing.
    

## Not sure whether you need a repair or a system

The free in-home inspection across Scarborough tells you which, in writing, with the CAD number beside it.

call (647) 254-5110

[tel:+16472545110 →](tel:+16472545110)

 

Book Free Inspection

[/contact/ →](/contact/)

Why us here

## 6 Reasons Scarborough Homeowners Call Our Crew

-   check\_circle 25+ Years of Foundation Waterproofing Experience across Scarborough post-war housing and newer subdivisions
-   check\_circle Same-day dispatch across Agincourt, Malvern, Guildwood, Birch Cliff, and West Hill
-   check\_circle Sewer backup diagnosed as a sewer problem, not sold as a foundation system
-   check\_circle Registered contractor for the $3,400 CAD Toronto Basement Flooding Protection Subsidy, filed by us
-   check\_circle Clay soil movement assessed with measured crack widths rather than guesswork
-   check\_circle Published CAD pricing on every scope before the crew is booked

Local logistics

## Malvern to the Bluffs: How a Scarborough Call Gets Routed

Scarborough runs off the 401, Kennedy, Markham Road, and Kingston Road. Because the district is large, we stage the day by corridor rather than by postal code, which is how a Malvern call in the morning and a Guildwood call in the afternoon both fit in the same run. If you are searching for a waterproofing crew near you in Scarborough, the nearest truck is usually already working somewhere between Scarborough Town Centre and Kingston Road.

Sewer backup drives a disproportionate share of our Scarborough emergency work. When a call comes in describing discoloured water rising through a floor drain, we treat it as a sanitary surcharge and dispatch with camera equipment, because the fix is a 

backwater valve

[/backwater-valve-installation-toronto/ →](/backwater-valve-installation-toronto/)

 rather than anything to do with the foundation. Stopping the next backup is what protects a finished basement from repeat water damage: soaked drywall, ruined flooring, and mould behind the walls.

The Bluffs area has its own logistics. Properties near the escarpment in Cliffside, Cliffcrest, and Scarborough Village have grade changes, drainage that runs across rather than around the lot, and slope stability considerations that push the scope toward surface water management before any basement work. Homes on the lower streets near Highland Creek and the Rouge River see the same pattern during spring thaw.

Scarborough is part of the City of Toronto, so the Building Division permit process and the Basement Flooding Protection Subsidy both apply at their full value. Foundation Waterproofing Toronto files both for eligible sump pump, backwater valve, and pipe severance work.

## Clay Movement and Sewer Backup: Foundation Repair or a Backwater Valve

Scarborough's foundation problems come in three recognisable forms.

**Clay soil movement** is the most widespread. Scarborough clay shrinks in dry summers and swells when saturated, and that annual cycle opens vertical and diagonal cracks in poured concrete walls built in the 1950s and 1960s, especially in the bungalows of Wexford, Dorset Park, and Bendale. Most are non-structural and 

injectable

[/foundation-crack-repair-toronto/ →](/foundation-crack-repair-toronto/)

 at $500 to $1,200 CAD, but they recur elsewhere on the wall if grading and drainage are never addressed.

**Sewer backup** is concentrated on specific streets rather than spread evenly. Where a sanitary main surcharges during heavy rain, the lowest fixture on the block takes the overflow, and that is a hydraulics problem rather than a foundation one. A mainline backwater valve at $2,000 to $4,500 CAD, with up to $1,250 CAD subsidised, is the correct response.

**Bluffs-area drainage**, from Birch Cliff through Guildwood, deals with surface water moving down and across slopes. Yard drainage, 

French drains

[/french-drain-installation-toronto/ →](/french-drain-installation-toronto/)

, and 

window well work

[/window-well-drainage-toronto/ →](/window-well-drainage-toronto/)

 matter more here than membrane, and they are the cheaper and more effective spend.

**Malvern and Agincourt subdivisions** are newer and mostly poured concrete with original perforated tile, silted after four decades. Camera scoping tells us whether the exterior line is still functional, and the result decides which 

foundation waterproofing Toronto

[/ →](/)

 scope we quote.

The best basement waterproofing method for a Scarborough house is the one that matches the water source. Water through the wall on a lot with side-yard access points to exterior membrane and drainage board. Water at the cove joint or up through the slab points to interior weeping tile and a sump pump. Water through the floor drain is sewer backup, and no foundation system fixes it.

![Two crew members inspecting a damp foundation wall together with a moisture meter in a Greater Toronto Area basement](/images/content/two-crew-members-inspecting-a-damp-foundation-wall.webp)

### Scarborough at a glance

Neighbourhoods covered

Agincourt, Guildwood, Birch Cliff, Malvern

Postal zones

M1B to M1X

Response time

Same-day

Permits through

City of Toronto

Book Free In-Home Inspection

[/contact/ →](/contact/)

directions Get Directions to Scarborough

[https://www.google.com/maps/dir/?api=1&destination=43.7764,-79.2318 →](https://www.google.com/maps/dir/?api=1&destination=43.7764,-79.2318)

Customer Feedback

## What Scarborough Customers Say

Verified project feedback from Toronto and GTA homeowners. Names are shortened for privacy.

format\_quote

> Sewage came up our basement floor drain twice. They camera scoped the lateral, installed a mainline backwater valve, and filed the subsidy. After the cheque we were out about $1,800 CAD in total.

Tomas K.Agincourt

format\_quote

> Our problem near the Bluffs turned out to be surface water running across the lot, not the foundation. They put in a French drain and regraded for about $6,800 CAD rather than selling us an interior system.

Amara N.Guildwood

format\_quote

> Two shrinkage cracks that leaked every spring. Injected both in one afternoon, measured and documented why neither needed epoxy, and pointed out the downspout that was making it worse.

Rosalind H.Malvern

Answers

## Foundation Waterproofing in Scarborough: Questions We Get

How much does foundation waterproofing cost in Scarborough? expand\_more

Crack injection is $500 to $1,800 CAD per crack, interior weeping tile is $8,000 to $18,000 CAD full perimeter, and a backwater valve is $2,000 to $4,500 CAD with up to $1,250 CAD subsidised (2026 pricing). The in-home inspection that sets the scope is free.

Why does my Scarborough street keep having sewer backups? expand\_more

Backups cluster by sewer segment. When a sanitary main surcharges during heavy rain, the lowest fixture on the block takes the overflow, which is why neighbours flood in the same storm and houses two streets over do not. A backwater valve is the direct protection.

Is the Toronto subsidy available in Scarborough? expand\_more

Yes. Scarborough is part of the City of Toronto, so the Basement Flooding Protection Subsidy pays up to $3,400 CAD across a sump pump, backwater valve, and pipe severance. We are registered and file the paperwork for you.

Why do foundation cracks keep appearing in my Scarborough home? expand\_more

Clay soil here shrinks in dry summers and swells when saturated. That annual movement opens new cracks even after old ones are repaired, which is why we look at grading and drainage rather than only injecting the crack in front of us.

Do Bluffs-area properties need different work? expand\_more

Yes, in most cases. Slope and grade changes near the escarpment in Cliffside, Cliffcrest, and Guildwood mean surface water management, French drains, and window well drainage matter more than membrane or interior systems, and they cost considerably less.

How fast can you reach Malvern or Birch Cliff in an emergency? expand\_more

Same-day dispatch across Scarborough. When you call, tell us the water depth and whether the water is discoloured, because sewage backup is triaged separately from ground water and needs different equipment on the truck.

Should I install a sump pump and a backwater valve together? expand\_more

If both failure modes apply to your house, yes, and doing them in one visit shares the permit and mobilisation cost. A sump pump system with battery backup handles ground water, and the backwater valve handles sewer backup. It is also how most Scarborough homeowners reach the full $3,400 CAD subsidy rather than part of it.

Is interior or exterior waterproofing better for a Scarborough home? expand\_more

Neither is better in general; the water source decides. Exterior waterproofing with membrane and drainage board stops water at the foundation wall and runs $15,000 to $35,000 CAD for a full perimeter with excavation. Interior weeping tile to a sump pump relieves hydrostatic pressure from inside for $8,000 to $18,000 CAD, with no digging, which suits tighter semi-detached and townhouse lots.

Does home insurance cover foundation waterproofing in Scarborough? expand\_more

Usually not for the waterproofing itself. Most Ontario home insurance policies treat seepage through foundation walls as gradual damage, and sudden sewer backup is only covered with a sewer backup endorsement. Some insurers ask for a backwater valve before offering that coverage, and our itemised written invoice documents the installation for your insurer.

### Still have a question about your basement

Book a free in-home inspection and we will answer it in writing, with the scope and the CAD price on the same page.

Book Free In-Home Inspection

[/contact/ →](/contact/)

## Foundation Waterproofing Near Scarborough

Our crews cover neighbouring areas on the same dispatch schedule, so a job next door does not wait for a separate truck.

TorontoSame-day response arrow\_forward

[/service-areas/toronto/ →](/service-areas/toronto/)

 

MarkhamSame-day response arrow\_forward

[/service-areas/markham/ →](/service-areas/markham/)

 

North YorkSame-day response arrow\_forward

[/service-areas/north-york/ →](/service-areas/north-york/)

![](/images/misc/two-crew-members-reviewing-a-written-cad-diagnosti.webp)

Same-Day GTA Emergency Response

## Book a free foundation inspection in Scarborough

A crew attends on a same-day schedule, identifies the water source, and puts the scope and the CAD price in writing before any work is booked.

calendar\_month Book Free In-Home Inspection

[/contact/ →](/contact/)

 

call Call (647) 254-5110

[tel:+16472545110 →](tel:+16472545110)

-   check\_circle Free in-home inspection with a written diagnostic
-   check\_circle Published CAD pricing before any work starts
-   check\_circle OBC Part 9 compliant, WSIB registered, $2M insured