How to Measure Your Windows for Plantation Shutters: A Practical Guide

What ultimately inspired you to buy plantation shutters for your house, then? I will not sugarcoat this. Although measuring windows for shutters isn’t particularly difficult, if you don’t know what to play next, it’s one of those songs where the music stops and things quickly spiral out of control.

What distinguishes shutters that leave unsightly gaps from those that fit perfectly? Either way, the shutters usually land within a few millimetres.

Why Accurate Measurements Actually Matter

Before we dive all the way into how to measure plantation shutters, let’s address why this is so important. You may figure that “close enough” is close enough. It’s really not.

Badly cut shutters result in gaps through which light seeps and coverage that’s not the same on each end. And what’s worse? They won’t open and close right. That, trust me, is more frustrating than a good-looking set of brand-new uPVC shutters sticking incessantly every time you want to adjust them.

Additionally, the moisture-resistant uPVC shutters are ideal for Perth’s climate; however, they require an accurate fit inside your window frames. Good window coverings make an important contribution to the climate control of your home – windows are responsible for up to 40% of heating loss in winter, and up to 87% of heat gained or lost through a window occurs via the panes themselves. Timber shutters will give you a little leeway, but only a little: accuracy is key.

The Tools You’ll Actually Need

Okay, let’s discuss the equipment. Although you don’t really need anything fancy, you do need the appropriate items.

Grab yourself:

• Gather a steel tape measure (the metal ones are significantly more accurate than the fabric ones used for sewing).
• You should also have a pencil and paper, or if you’re in a pinch, a note app on your phone.
• You should also have a small spirit level, as these tiny little spirit levels are perfect for this task.
• If you have a high bay window, consider hiring an assistant for the task.

That’s all. This part shouldn’t be overly complicated.

Understanding Your Window Recess

Many do-it-yourself plantation shutter measuring guides fall short in this area. They do not explain well how to compare what you are actually measuring to.

Your window is located in what is called a “recess”, which is an alcove or frame area. So for the majority of typical installs, you will be measuring not the glass itself but simply the recess to which it will be fitted. Websites If this is your first time, it can be challenging to get these right.

Your shutters will be installed in the recess. They need to be proportioned properly to fit in this area, whether you’re purchasing hinged plantation shutters for your front room or those gorgeous arch window shutters for the feature window at the top of the stairs.

The Basic Measuring Process

Ok then, how do you properly measure windows for shutters? I’m going to guide you through this, step by step, and it’s easier than it sounds, I swear.

Step 1: Measure the Width

Please consider using your tape measure to measure the width of your window recess at three points: top, middle, and bottom.

Why three points? Most window frames are not perfectly square. Walls settle, houses move and builders make mistakes. Record all three measurements and use the smallest. If the width is even one millimetre too wide, the shutters will not fit.

Step 2: Measure the Height

Use the same method as before. Measure at three points – left side, middle and right side. Write down all three and go with the smallest.

This method is especially true for tier-on-tier plantation shutters, which have top and bottom sections that require incredibly precise measurements.

Step 3: Check the Depth

This step often causes confusion. You’ll want to take a good measure of how deep your window recess is, it’s the only way you’re going to get an idea of how much space you have for fitting.

Measure from the front of the window frame to where the window sits. The majority of aluminium outdoor shutters and uPVC shutters require a minimum depth of 60 mm, yet it’s preferable to know the specifics.

Special Window Shapes (Because Perth Homes Love Character)

Standard rectangular windows? Easy. But what about when your house has a little more personality?

Bay Windows

Bay windows are lovely, but taking their measurements just got fascinating. Measure each section of the bay individually, as they usually create angles. Driving to meet potential installers can be helpful, as well as discussing your project with professionals over the phone.

Arched Windows

They’re stunning but tricky to measure. You want the width and height of the straight part in addition to the arch’s radius. Measure to the tallest point and then remeasure, because arch plantation shutters require precision.

Triangle Windows

You would have to measure all three sides and get the angles right. In cases like this, it’s one of the instances where paying for a measure from an expert like the team at Prestige Shutters is worth doing.

Inside Mount vs Outside Mount: What’s the Deal?

This dilemma is something people always ask about. Do you mount the shutters inside the window recess (inside mount) or on the wall around the window (outside mount)?

Most folks in Perth go with inside mounts because they give that clean, built-in look. Plus, it works better with the window sills people actually want to use. Your measurements will be slightly different depending on which mount type you’re going for.

An inside mount focuses on the recess we discussed earlier. Outside mounting means you’re measuring the area around your window frame; instead, usually, you’ll want to go a bit wider and taller than the actual window to make sure you’re getting good coverage.

Common Mistakes (and How to Dodge Them)

Let’s discuss common pitfalls to avoid making costly mistakes.

• Assuming all windows are identical: Even if they look the same, measure each one separately. You’d be surprised how much variation there can be, especially in older homes.
• Forgetting about handles and locks: Chunky handles or locks that stick out can interfere with shutter operation if you don’t account for them.
• Ignoring obstructions: Curtain rods, light switches, or internal blinds might be in the way. Please make sure to document everything before you begin.
• Failing to verify if frames are square: Hold that little level up and see if things are actually straight. Out-of-square frames need special attention.

Taking an extra ten minutes to verify these things now can save you weeks of headaches later. Worth it? Absolutely.

Material Matters for Measurements

Different shutter materials have slightly different requirements. Are those waterproof uPVC shutters an excellent choice for kitchens and bathrooms? Because they are manufactured to extremely tight tolerances, it’s crucial that your measurements are precise.

Timber plantation shutters are a bit more flexible since wood can be trimmed on-site if needed (though you should avoid this). The aluminium outdoor shutters are typically mounted outside for security and weather protection, so your measuring approach is a bit different there.

According to Sustainability Victoria, uPVC frames maintain excellent dimensional stability over time, which is exactly why precise initial measurements are so critical for these shutters.

When to Call in the Professionals

Look, there’s DIY and then there’s false economy. For straightforward rectangular windows, having a go at your measurements can work fine.

But here’s when you should get a pro:

• You’ve got unusual window shapes (arches, triangles, circles).
• Your windows are really high up or difficult to reach safely.
• The house is old and nothing seems square or level.
• You’re using multiple windows, and you want consistency across them all.
• You’re spending a fair chunk of money, and you want peace of mind.

The team at Prestige Shutters offers free measurement and quotation services across Perth. Sometimes it’s just smarter to let people who do this daily handle the measurements, especially when you’re investing in quality shutters with that 20-year warranty.

Tips for Working with Your Shutter Supplier

Once you’ve got your measurements, here’s how to make the quote process smoother. Take photos of each window from multiple angles – straight on, from the sides, showing the whole room. This gives context that numbers alone can’t provide.

Note down what’s around each window. Is there a radiator underneath? Shallow sill? These details matter for installation planning.

And be honest about what you want the shutters to do. Light control? Privacy? Energy efficiency? This data helps determine whether those moisture-resistant uPVC shutters are your best bet or if you’d prefer the warmth of timber.

Getting It Right the First Time

Here’s the thing about measuring windows for shutters: accuracy matters, but so does knowing your limits. There’s no shame in saying, “You know what? I’d rather have a professional handle the task and take accurate measurements.”

Whether you’re going with uPVC for wet areas, timber for that classic look, or aluminium for outdoor protection, starting with accurate measurements makes everything else fall into place.

So grab that tape measure, take your time, and write everything down. If you get stuck or things seem more complicated than expected? Give the Prestige Shutters team a call. That’s what they’re there for.

Plantation shutters are an investment in your home. Getting the measurements right from the start means perfectly fitted shutters that look great and work brilliantly for decades to come.