When it comes to ordering custom blinds, accurate measurements are everything. Even the most stylish and high-quality blinds won’t look right—or work properly—if they don’t fit your windows. A small measuring mistake can lead to gaps, crooked blinds, or wasted money on replacements.

For homeowners in Mississauga, Oakville, Etobicoke, and Burlington, where homes range from modern condos to large family houses, window sizes and shapes vary widely. That’s why knowing exactly how to measure your windows for custom blinds is essential.

This step-by-step guide will walk you through the process to ensure a perfect fit, whether you’re going for roller blinds, cellular shades, vertical blinds, or California shutters.

Step 1: Decide Between Inside Mount and Outside Mount

Inside Mount

Blinds are installed inside the window frame for a clean, modern look.

• Best for: modern condos in Etobicoke, minimalist homes in Mississauga.

• Requirements: windows must be deep and square for proper installation.

Outside Mount

Blinds cover the entire window frame, mounted on the wall or molding.

• Best for: Burlington or Oakville homes where you want to block more light.

• Benefits: hides uneven windows and gives the appearance of larger windows.

👉 Tip: Always decide this first, as measurements will differ.

Step 2: Gather the Right Tools

To get accurate results, you’ll need:

• A steel measuring tape (not cloth)

• A pencil and notepad

• A step ladder (for tall windows)

• A level (optional, for checking squareness)

Step 3: Measure the Width

Inside Mount

1. Measure the width at three points: top, middle, and bottom.

2. Record the smallest measurement.

3. This ensures the blinds won’t be too wide and rub against the frame.

Outside Mount

1. Measure the width of the window frame.

2. Add 3–4 inches to each side to prevent light gaps.

3. This creates full coverage and better privacy.

Step 4: Measure the Height

Inside Mount

1. Measure the height at three points: left, center, and right.

2. Record the longest measurement.

3. This ensures full coverage and prevents light gaps at the bottom.

Outside Mount

1. Measure from the top of where the blind will be mounted to the bottom of the window or sill.

2. Add 2–3 inches above and below for better coverage.

Step 5: Check Depth Requirements

For inside mounts, your window frame must have enough depth to accommodate the blind. For example, cellular shades may require less depth than Venetian blinds. Always check product specifications.

📏 Skip the guesswork—book a free professional measuring service with Wintex Window Covering in Mississauga, Oakville, Etobicoke, or Burlington.

Common Measuring Mistakes to Avoid

1. Using Cloth Tape: Stretchable tapes cause inaccurate measurements.

2. Rounding Numbers: Always measure to the nearest 1/8 inch.

3. Forgetting Hardware Clearance: Brackets and mounting systems take space.

4. Assuming Windows Are Square: Measure at multiple points—many aren’t perfectly square.

5. Mixing Up Width and Height: Always record width first, then height.

Step 6: Double-Check Your Measurements

After taking initial measurements, repeat the process to confirm accuracy. Even a small error can cause blinds to fit improperly.

Step 7: Consider Special Window Types

• Bay Windows: Measure each section individually. Outside mounts often work best.

• Patio Doors: Vertical blinds or Allusion blinds require extra width for smooth operation.

• Large Picture Windows: Layered treatments with an outside mount provide the best coverage.

Why Professional Measuring Matters in the GTA

While DIY measuring is possible, many homeowners in Mississauga, Oakville, Etobicoke, and Burlington prefer professional help for peace of mind. Benefits include:

• Guaranteed accuracy

• Knowledge of product-specific requirements

• Proper planning for hardware and mounting depth

• Professional advice on the best blinds for your window type

✨ Order custom blinds with confidence—Wintex Window Covering ensures a perfect fit every time. Book your free consultation today in Mississauga, Oakville, Etobicoke, or Burlington.

FAQs

1. Can I measure windows myself for custom blinds?
Yes, but double-check for accuracy to avoid costly mistakes.

2. Which is better: inside mount or outside mount?
It depends—inside mounts look sleek, while outside mounts block more light.

3. Do I need special tools for measuring?
No—just a steel tape measure, notepad, and ladder.

4. Can I reuse old measurements?
No—always measure again, even for the same window.

5. What if my windows aren’t square?
Outside mounts are usually the best solution, or a professional installer can adjust.