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Exterior Patio Door & Extension Openings

Structural Openings for Sliding Doors, Walkouts & Home Extensions

Cutting a new opening in an exterior wall is not a small task—it’s one of the most structurally sensitive parts of any renovation. Whether you’re expanding a patio door, converting a window into a walkout, or creating an opening for a future home extension, the structural load, exterior envelope, and engineering requirements must be handled properly.

 

Crown Structural specializes in exterior wall openings that require engineered beams, reinforced supports, and precise execution. Contractors choose us because we deliver clean, code-compliant work that passes inspection the first time.

Our Exterior Structural Opening Services

✔ Converting Windows Into Patio Doors or Walkouts

We expand or replace existing openings to accommodate:

  • Sliding doors

  • French doors

  • Bifold or accordion systems

  • Multi-panel panoramic doors

  • Walkout basements or backyard access

 

We support the structure above, remove the existing masonry/framing, and install the required beam for a flawless opening.

✔ New Openings in Exterior Load-Bearing Walls

If the wall currently has no opening, we create one safely and cleanly with:

  • Proper temporary shoring

  • Engineer-approved beam installation

  • Structural posts and bearing points

 

Perfect for extensions, additions, and completely reconfiguring back-of-house layouts.

✔ Enlarging Existing Patio Doors

Modern homes favour larger glass spans and indoor–outdoor flow. We increase opening width or height while maintaining full structural integrity.

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Common requests include:

5 ft → 8 ft openings

6 ft → 12–16 ft panoramic systems

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Raising the header for taller exterior doors

We ensure the new span is supported correctly with steel or LVL beams.

✔ Structural Prep for Home Extensions & Additions

If you’re extending the home outward or adding a sunroom, you’ll need a properly sized opening in the original exterior wall.

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We handle:

  • Opening structural review

  • Load path evaluation

  • Beam sizing & installation

  • Post placement & footing coordination

  • Reframing for connection to the new extension

 

Your extension framing crew can begin immediately once we’re done.

✔ Masonry, Brick, and Mixed-Material Openings

Exterior openings often involve more than just wood framing.


We work with:

  • Brick veneer

  • Block/CMU

  • Mixed masonry

  • Stucco

  • Wood-frame exteriors

  • Old Toronto homes with double brick

 

Everything is cut and supported with the proper safety systems.

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Why Contractors Trust Crown for Exterior Openings

  • We plan and execute with precision — exterior walls demand it

  • We coordinate engineering so you don’t get stuck waiting

  • We anticipate hidden issues in older Toronto homes

  • We keep your project watertight and protected

  • We communicate clearly and professionally

  • We leave the site ready for your door installers or extension crew

 

Exterior openings have zero room for mistakes. We make sure the structure is right the first time.

Ideal Projects for This Service​

  • Backyard walkout conversions

  • Sliding and bifold door installs

  • Window-to-door expansions

  • Basement walkout creation

  • Rear extensions and additions

  • Kitchen renovations with new patio access

  • Larger openings for more natural light

  • Upgrading small outdated doors to wide glass spans

 

If the project requires cutting into an exterior load-bearing wall, we handle it.

READY TO MOVE FORWARD?

Structural work is not intended for general contractors or handymen.

Call us today and save yourself any future headaches!

Service Areas

Toronto, Etobicoke, North York, Scarborough, York Region, Vaughan, Woodbridge, Mississauga, Brampton, Oakville, Burlington, Hamilton, Milton

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