Home Inspection Checklist: Are Your Windows & Doors Up to Code?

If you’re a homeowner in Toronto or the Greater Toronto Area (GTA), you know our weather doesn’t play nice. One day it’s sunny and crisp, the next we’re buried under snow or soaked in summer humidity. These wild swings don’t just test your patience, they take a serious toll on your home’s exterior, especially your windows and doors. And when it comes time for a home inspection, whether you’re selling, refinancing, or just upgrading, those years of freeze-thaw cycles, condensation, and wind-driven rain can suddenly become very expensive problems.

The truth is, many homeowners in Vaughan, Mississauga, Brampton, and across the GTA are surprised by what inspectors flag during a standard evaluation. It’s not just about cracked glass or squeaky hinges. It’s about safety, energy efficiency, structural integrity, and compliance with Ontario’s building codes.

So, before you list your home or invest in costly repairs, let’s walk through a practical checklist: Are your windows and doors actually up to code?

Why Home Inspectors Pay Close Attention to Windows and Doors

A home inspection isn’t just a formality, it’s a deep dive into your home’s condition. And inspectors in Ontario are trained to look for specific red flags, especially in components that affect:

• Energy efficiency (Are you losing heat in winter?)
• Safety (Can someone escape through a bedroom window?)
• Moisture control (Is water sneaking in around your door frame?)
• Structural performance (Is your entry door properly sealed and level?)

In older homes, common across Toronto’s historic neighbourhoods like The Beaches, Riverdale, or Forest Hill, outdated windows and worn entry doors are among the most frequent issues inspectors report. And in newer builds or renovations, poor installation can be just as problematic as bad materials.

That’s why simply having “new” windows or a stylish front door isn’t enough. New casement windows need to be installed correctly and meet current standards.

Ontario Building Code: What You Need to Know

The Ontario Building Code (OBC) sets minimum requirements for safety, accessibility, and energy performance in all homes. While you don’t need to memorize every clause, there are a few key rules that directly impact your windows and doors:

1. Thermal Performance (Energy Efficiency)

Single-pane windows are no longer up to code for replacements. The OBC requires improved insulation, which means double- or triple-pane windows with low-emissivity (Low-E) coatings and gas fills (like argon) are now standard.

Why it matters: In the GTA, heating costs are significant. Poorly insulated windows can account for up to 25% of heat loss in a home, driving up bills and failing inspection thresholds.

2. Safety Glazing Requirements

Any glass within 1.5 meters (5 feet) of the floor and within 900 mm (3 ft) of a door must be made of tempered or laminated safety glass. This includes:

• Entry doors with glass panels
• Sidelites beside your front door
• Patio doors
• Bathroom windows

Why it matters: Regular glass can shatter into sharp shards. Safety glass is designed to crumble into small cubes (tempered) or hold together (laminated), reducing injury risk.

3. Egress Requirements for Bedroom Windows

Every bedroom must have at least one operable window that meets minimum size requirements for emergency escape:

• Minimum net clear opening: 0.35 m² (3.8 sq ft)
• Minimum height: 380 mm (15 in)
• Minimum width: 380 mm (15 in)

Why it matters: If a fire blocks the door, a family member must be able to climb out safely. Many older homes in Toronto have small, non-functional windows that fail this test.

4. Door Threshold Height and Trip Hazards

Exterior doors must have a threshold that prevents water entry but isn’t a tripping hazard. The OBC limits the height difference between indoor flooring and outdoor landing to no more than 7.5 inches (190 mm) without a handrail.

Why it matters: High thresholds are common in older homes and can be dangerous, especially for seniors or young children.

Windows: 6 Common Code Issues in GTA Homes

Even if your windows look fine from the inside, they might not pass inspection. Here’s what inspectors check, and what you should look for:

1. Condensation Between Panes
   If you see fog or dirt trapped between the glass layers, the seal has failed. This isn’t just ugly, it means moisture is getting in, which can lead to rot and mould.
   Solution: Replace the unit with a new double- or triple-pane window designed for Canadian climates.
2. Single-Pane Glass
   Still common in older homes built before the 1980s, single-pane windows offer almost no insulation. They’re drafty, noisy, and inefficient.
   Solution: Upgrade to energy-efficient replacement windows. Incentives like the Canada Greener Homes Grant can help offset costs.
3. Rotting or Warped Frames
   Wood frames in older Toronto homes often degrade due to moisture. Vinyl and aluminum can also warp over time.
   Solution: Choose durable materials like fiberglass or high-grade vinyl that resist warping and require minimal maintenance.
4. Improper Flashing or Caulking
   Missing or cracked sealant around frames can affect ventilation, allowing water to seep into walls, leading to hidden rot and mould.
   Solution: Ensure new windows are installed with proper flashing tape and weather-resistant barriers, a step many DIYers skip.
5. Non-Operational or Stuck Windows
   Windows that won’t open or close properly fail egress requirements and raise red flags.
   Solution: Replace with modern casement, awning, or hung windows that operate smoothly and lock securely.
6. Lack of Child Safety Features
   While not always required, inspectors may note if windows open more than 4 inches without a lock or restrictor, especially on upper floors.
   Solution: Install windows with built-in locks or add child safety guards.

Entry & Patio Doors: 5 Code Violations We See Too Often

Your front and patio doors are high-traffic areas that face the brunt of GTA weather. Here’s what often goes wrong:

1. Drafts Around the Frame
   If you can feel cold air around your door, even after weatherstripping, it likely means the frame is damaged or improperly installed.
   Solution: Replace both door and frame with a custom-fit unit to eliminate gaps. Luma’s factory-direct doors are built to your exact measurements.
2. Warped or Sagging Doors
   Steel and wood doors can warp over time, especially if exposed to direct sun or moisture. A door that doesn’t close properly is a security and energy risk.
   Solution: Upgrade to fiberglass entry doors, which resist warping, cracking, and fading, perfect for Toronto’s climate.
3. Missing Safety Glass in Door Panels
   Many older doors have regular glass that can shatter easily. Inspectors will flag this immediately.
   Solution: Install a new door with tempered or decorative safety glass, available in countless styles to match your home’s character.
4. Improper Thresholds or Step-Ups
   A high step at your back or front door is a trip hazard and may not meet code.
   Solution: Consider a level-entry installation or threshold ramp for better accessibility and safety.
5. Patio Doors That Stick or Leak
   Sliding patio doors in Mississauga or Oakville homes often fail due to track corrosion or poor seals.
   Solution: Replace with heavy-duty sliding or French patio doors featuring durable rollers, thermal breaks, and multi-point locking systems.

The Hidden Problem: Poor Installation

Here’s a hard truth: Even the best window or door can fail inspection if it’s installed wrong.

We’ve seen homeowners spend thousands on premium products, only to have inspectors point out:

• Gaps around the frame
• Missing insulation
• Improper flashing
• Misaligned doors

These aren’t product flaws. They’re installation errors.

At Luma, we don’t hire general contractors. Our team consists of licensed, factory-trained installers who follow strict protocols to ensure every job meets Ontario building standards. We inspect our own work before we leave your home, because we know how much is on the line.

Are You Ready for a Home Inspection? Try This 5-Step Checklist

Before you call in an inspector, do a quick self-check:

1. Walk around your home and test every window. Can it open, close, and lock smoothly? Is there fog between the panes?
2. Feel for drafts around doors. Hold your hand near the frame and threshold. Do you feel cold air?
3. Look for signs of rot or peeling paint around window sills and door frames, especially in older homes.
4. Check if glass near doors is safety-rated. Look for the “Tempered” or “L” logo etched in the corner.
5. Measure bedroom windows. Can an adult easily climb through? If not, it may not meet egress code.

If you’re unsure about any of these, it’s time to call in a professional.

When to Repair vs. Replace

Not every issue requires a full replacement. But know the difference:

• Repair: Minor paint touch-ups, replacing weatherstripping, fixing a loose handle.
• Replace: Warped frames, failed seals, single-pane glass, rot, or doors that don’t close properly.

In most cases, replacement is more cost-effective long-term. Modern windows and doors pay for themselves through lower energy bills, increased comfort, and higher home value.

Upgrading Doors And Windows for Home Inspection

When you’re preparing for a home inspection, you don’t just need new windows or doors, you need the right ones, installed right. At Luma, we’ve helped thousands of homeowners across the GTA upgrade to code-compliant, energy-efficient solutions. Here’s what sets us apart:

• Factory-direct pricing – No middlemen, no markups
• Custom-built for your home – Perfect fit, no gaps
• Licensed, trained installers – Every job meets Ontario code
• Premium materials – Fiberglass, steel, and vinyl built for Canadian winters

Don’t Wait Until It’s Too Late For Your Home Inspection

A home inspection doesn’t have to be stressful. With the right preparation, you can pass with confidence and even increase your home’s value. If your windows are drafty, your door doesn’t close right, or you’re unsure if your glass is safe, don’t wait for an inspector to tell you. Take action now. At Luma, we offer free pre-inspection assessments to help you identify problem areas and upgrade to solutions that meet code, save energy, and enhance your home’s beauty.

Your home deserves to be safe, efficient, and ready for whatever Ontario’s weather, and the real estate market, throws at it. Let’s make sure it is.