Window Door Stuck

Jamming, Sticking Windows & Doors

A window that is cracked at the corner and separating from the brick foundation wall in Clarington

Windows and doors are a structural weakness in your home. That's why foundation settlement will often cause cracks around window and door openings, as shown above.

The Problem:

Your windows and/or doors are sticking, jamming, or your doors have non-functioning locks.

Telltale Signs:

  • Doors don't open or close properly.
  • Windows need extra force to open & close.
  • Diagonal cracks that start at top corners of windows & door openings.
  • Floors Are Uneven, Or Dip & Sag.
  • Door & Window Openings Out Of Square.

How to Fix It:

While there are many issues that can lead to sticking windows and doors, the two most common foundation-related causes are settlement and crawl space supports that have settled, shifted, or deteriorated.

Foundation piers can be used to repair settlement issues, while crawl space jacks are a good solution for sagging floors over crawl spaces.

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Schedule A Free Estimate

If you have a problem with your foundation, we can help. At Foundation Supportworks of Ontario, we offer free, no-obligation free foundation repair quotes within our Ontario service area. Each free quote includes an on-site inspection, personal consultation, and written estimate.

We serve Brampton, Mississauga, Toronto, Vaughan, Markham, Hamilton, Oakville, Burlington, Oshawa, Richmond Hill, St. Catharines, Barrie, Whitby, Owen Sound, Ajax, Pickering, Guelph and many nearby areas in Ontario.

Identifying Problems With Windows & Doors

Any problem with a home can be distressing, and doubly so when there's a problem with your foundation. However, it's good to know that a foundation contractor can identify the problem and have the damage quickly and permanently repaired -- restoring value and stability to your home.

Symptoms Of Sticking Windows & Doors

We depend on windows and doors for ventilation, security, and aesthetic appeal. So when they don't operate correctly or don't look good because of skewed openings or cracks around openings, it's clear that something must be done.

Below are images of windows and doors we've encountered that have been damaged due to foundation issues.

(Click each photo to enlarge.)

Stair step cracking starting at a window in a Caledon homeSliding doors that are crooked and jamming due to a foundation issue in Caledon home A long foundation crack that begins at a doorway of a Kawartha Lakes home. A long drywall crack beginning at the corner of a doorway in a Newmarket home.
A long, diagonal crack that begins at a window corner of a Clarington home long jagged cracks starting at the corner of a window along a brick wall on a Pickering home A large settlement crack on interior drywall in a Guelph home. A gap in a window along the outer wall due to foundation settlement of a Whitby home.

What Causes Windows And Doors To Stick Or Jam?

Cracks that extend along window and door openings can be a symptom of a much larger foundation settlement issue. If ignored, it's possible that the foundation problem that caused these cracks will get worse, potentially leading to more severe damage to your home.

Window and door cracks that are connected to foundation problems have two common sources:

Illustration of a severe foundation settlement issue

Settling Foundations

Because of varying soil characteristics, foundation settlement is never uniform. Uneven settlement causes sections of a foundation or slab to crack and shift, while other sections remain in their original positions.

While foundations and slabs crack due to soil settlement, the wood framing supported above is more likely to bend or twist. This results in skewed openings for windows -- and doors and floors that dip.

The drywall fastened to wood framing is not as flexible, so it's more likely to crack -- especially at the corners of window and doors. When a house has a brick or stone exterior, a settled foundation is likely to have cracks in these upper masonry surfaces due to a lack of flexibility

More about foundation settlement issues.

Illustration of a completed installation of a foundation push pier system The Solution:

At Foundation Supportworks of Ontario, we address foundation settlement issues by installing foundation piers at key locations. The piers extend to stable, load-bearing soil, attached to the foundation with steel brackets. This repair work prevents further settling -- and can even allow the foundation to be jacked back to its original position.

Once the foundation is raised back up, cracks in the wall will close. Doors, locks, and windows may return to functionality, and further settlement damage will halt.

We offer two different types of foundation piers to address foundation settlement: push piers and helical piers. With either installation, there's a 25-year manufacturer's warranty, as well as our own performance warranty.

More about foundation piers.


Illustration of a severely sinking crawl space structure.

Sinking Crawl Space Supports

Crawl spaces are often poorly designed, with too few support columns, rotting floor joists and girders, and weak supporting soils causing the supports to sink.

As the crawl space structure sinks, the floor that it supports will sink as well, creating uneven surfaces underfoot. And as the floor sinks, it will pull the interior walls that are attached to it downwards.

As the walls sink, they pull apart, leaving cracks in your interior walls. And as the home warps, doors inside the home will jam and become difficult to open or shut.

More about sinking crawl spaces.

Illustration of a repaired crawl space structure with crawl space jacks The Solution:

We repair crawl space structural issues with crawl space support jacks. We begin by excavating a hole for each support and creating a base of engineered fill. A pre-cast concrete base is installed on top of the fill, and the support jack is mounted on top.

Once installed, our crawl space supports will stop your floor from sinking and sagging. These adjustable jacks can also be modified to attempt to lift your floors and walls back to a level position.

Crawl space jack systems install quickly -- with an installation usually being completed in about a day. They provide a superior solution to other repairs, such as concrete columns, shimming, and light-duty jack posts.

More about crawl space jacks.

Which is Which?

Problems associated with your foundation may not always be very obvious, that's why it's important to contact a professional foundation repair company. Our foundation specialists will be able to exactly identify what's causing your windows and doors to stick and where the problems are arising. Our company offers your home a permanent solution and ultimately increases your home's value and safety.

If you have exterior cracks, jamming doors, and windows, then the problem is most likely not sinking crawl space supports. These cracks are most often caused by foundation settlement.

Identifying The Source Of Window & Door Issues

  Potentially Caused By:
Structural Problem Crawl Space Structural Issue Foundation Settlement
Jamming Exterior
Or Entryway Doors
  green checkmark
Jamming Interior Doorways green checkmark green checkmark
Sticking Windows   green checkmark
Cracks Along Windows
& Entryway Doors
  green checkmark
Cracks Along Interior Doorways green checkmark green checkmark
Sinking, Sagging Floors green checkmark  

Your Neighborhood Foundation Repair Contractors in Ontario

Don't let your sticking windows and doors become an inconvenience to your home, Foundation Supportworks of Ontario can help fix those problem areas for good.

We can help you fix your foundation with our warrantied solutions! Call us for a free foundation repair quote today!

Our service area includes Brampton, Mississauga, Toronto, Hamilton, Markham, Vaughan, Richmond Hill, Oakville, Burlington, Oshawa, St. Catharines, Barrie, Whitby, Owen Sound, Ajax, Pickering, Guelph, and cities nearby.

Looking for a price? Get a no cost, no obligation free estimate.

our service area

We serve the following areas

  • Ajax
  • Ashburn
  • Bowmanville
  • Brampton
  • Brougham
  • Burlington
  • Caesarea
  • Caledon
  • Caledon Village
  • Campbellcroft
  • Cheltenham
  • Claremont
  • Cobourg
  • Concord
  • Courtice
  • East York
  • Etobicoke
  • Gormley
  • Greenwood
  • Haydon
  • Inglewood
  • Kendal
  • Kleinburg
  • Locust Hill
  • Maple
  • Markham
  • Millbrook
  • Mississauga
  • Nestleton Station
  • Newcastle
  • Newtonville
  • North York
  • Oakville
  • Orono
  • Oshawa
  • Pickering
  • Pontypool
  • Port Hope
  • Richmond Hill
  • Scarborough
  • Stouffville
  • Terra Cotta
  • Thornhill
  • Toronto
  • Unionville
  • Vaughan
  • Whitby
  • Whitevale
  • Woodbridge
  • York
Our Locations:

Foundation Supportworks of Ontario
12045 McCowan Rd
Stouffville, ON L4A 4C3
1-289-201-1137