Plan Your St. Catharines Entry Door Upgrade
- ✓Local experts serving St. Catharines homeowners since 2009
- ✓Full-frame replacement for front, garden, and French doors
- ✓Transparent pricing with no hidden fees
Trusted Entry Door Upgrades for St. Catharines Homes
St. Catharines homeowners count on Great Northern Home Exteriors for reliable, long-lasting Dorplex steel and fibreglass entry door installations. Local homes — from Port Dalhousie to Glenridge and Merritton — benefit from proper full-frame installs, clean finishing, and weather-tight sealing designed for Niagara’s climate.
Entry, Garden & French Door Options
Choose from steel or fibreglass Dorplex systems with modern panels, decorative glass, and colour options. We also replace older patio sliders with durable garden or French doors.
Proper Full-Frame Installation
We remove your entire existing frame, assess the opening, install the new wood Dorplex frame, and seal it using low-expansion foam and quality exterior caulking for a weather-tight finish.
Clear Estimates & Straightforward Service
We review styles, hardware, and glass choices, then provide a simple, written quote and realistic timeline. No pushy selling — just honest guidance for your St. Catharines home.
Steel vs. Fibreglass Entry Doors: What’s Best for Your Home?
St. Catharines homes come in many styles — and the right door depends on how much you value durability, appearance, security, and long-term performance. Here’s a simple comparison to help you decide.
Steel Entry Doors
- Strong, secure, and excellent impact resistance
- Clean, smooth finish with sharp architectural lines
- More affordable than fibreglass
- Ideal for both modern and traditional homes
Fibreglass Entry Doors
- Realistic woodgrain textures without the upkeep
- Resists dents, scratches, and moisture changes
- Top-tier energy efficiency
- A great fit for Niagara’s freeze-thaw temperature swings
Not sure which one is right for your entryway? We can show you samples, explain the pros and cons, and recommend the best match for your home’s style and budget.

Decorative Glass Options for St. Catharines Entry Doors
A new entry door can brighten your foyer and elevate curb appeal — but the right glass style also affects privacy, natural light, and the overall look of your St. Catharines home. Our Dorplex steel and fibreglass entry doors come with a wide selection of modern and traditional glass designs.
- Frosted and satin glass for added privacy without blocking daylight
- Wrought-iron glass inserts that add character and dimension
- Clear glass with internal grills for a clean, classic appearance
- Mini-blinds between the glass for garden and French doors
- Textured privacy glass ideal for side-lights and transoms
Whether you prefer a bold statement panel or a minimalist frosted design, we’ll help you choose a glass option that fits your style and the look of your home.

Finishing Touches That Complete Your New Entry Door
The right hardware and finishing details make a big difference in how your new St. Catharines entry door looks and performs. We install high-quality components that are designed to last and match your home’s style.
- ✓ Heavy-duty hinges for smoother operation and long-term durability
- ✓ Decorative glass options in clear, frosted, and privacy styles
- ✓ Energy-efficient weatherstripping to keep out drafts and moisture
- ✓ Quality knobs, levers, and deadbolts available in modern and traditional finishes
- ✓ Custom-painted frames and brickmoulds to match your home’s exterior colours

How We Install Dorplex Entry Doors in St. Catharines
A proper door installation starts with the opening, not just the slab. Our crews follow a full-frame replacement process so your new entry, garden, or French door fits properly and seals tight.
- Remove the old door, frame, and exterior trims down to the rough opening.
- Inspect the sill and framing for moisture or rot and address any issues.
- Set the new Dorplex door frame level, square, and plumb.
- Secure the frame with proper fasteners and shim where needed.
- Foam and seal gaps around the frame to reduce drafts.
- Install new exterior brickmould and trims for a finished look.
- Apply exterior-grade caulking and complete final adjustments.
Why We Prefer Full-Frame Door Replacement
Reusing an old frame can lock in drafts, alignment issues, and worn-out sills. A full-frame replacement lets us correct these problems and gives your new door system the best chance to seal properly and operate smoothly.
It’s a bit more work on install day, but it’s the right approach for long-term performance in St. Catharines’ changing weather.


What to Expect on Entry Door Installation Day
When you book an entry door replacement with Great Northern Home Exteriors, we treat your St. Catharines home with the same care as our own. Our crew arrives on time, walks you through the plan, and makes sure your doorway is protected before any work begins.
- ✓ Careful removal of your old door, frame, and trim
- ✓ Inspection of the opening, subfloor, and sill area for any issues
- ✓ Precise setting of the new Dorplex entry system so it is level, square, and plumb
- ✓ Foam and insulation in the gaps around the frame to help reduce drafts
- ✓ New exterior brickmould and interior casing as needed for a clean finish
- ✓ Final hardware check, weatherstripping check, and cleanup before we leave
Before we go, we’ll walk you through the finished front, garden, or French door, answer questions, and make sure everything opens, closes, and locks the way it should.
Entry Door Projects Across St. Catharines Neighbourhoods
Great Northern Home Exteriors Inc. installs new front entry doors, garden doors, and French doors for homeowners across St. Catharines. Whether you are updating a tired entrance or replacing a drafty old door, we can help you choose a style that suits your home and handles Niagara’s changing weather.
- Port Dalhousie and lakeside streets
- North End and Lakeshore neighbourhoods
- Grapeview, Martindale & Vansickle
- Glenridge and surrounding courts
- Western Hill and Old Glenridge areas
- Merritton heritage and infill homes
- Downtown St. Catharines & St. Patrick’s ward
- Homes near Fourth Avenue shops & the hospital
If your home is in St. Catharines or the surrounding Niagara communities and you are thinking about a new entry, garden, or French door, we can provide a clear, no-pressure estimate and walk you through design and hardware options.
St. Catharines Entry Door Replacement FAQ
How long does it take to install a new entry door?
Most entry door installations in St. Catharines are completed in a single day. We remove the old door, install your new full-frame Dorplex system, insulate the perimeter, and finish the exterior trim before leaving.
Do you install garden doors and French doors?
Yes — we install steel, fibreglass, garden doors, and French doors, all custom-sized for your opening. Each unit includes factory-installed weatherstripping and a properly insulated frame.
Can you match the trim and colour to my home?
Absolutely. We offer factory paint colours, woodgrain finishes, and custom exterior capping so your new entry door blends cleanly with your home's exterior.
Do entry doors help with heat loss?
Yes — modern entry doors use insulated cores, quality weatherstripping, and a tight full-frame installation. This helps reduce drafts, especially in older neighbourhoods like Port Dalhousie, Grapeview, and Merritton.
Where can I learn more about home exterior updates in St. Catharines?
For local information on neighbourhood growth, exterior updates, and property guidelines, visit the City of St. Catharines page.
Serving the Niagara Region with Pride
St. Catharines Entry Doors(You’re Here)
Planning more exterior upgrades in St. Catharines? We also provide Windows, Siding, and Eavestrough for local homeowners.


