We are out of office May 1-3. We'll answer all your messages after we come back.
Tips & Advice

5 min read

How to measure windows correctly? Use these useful tips from our Expert!

Written by

Agata Gniady - Tęgi

Reading Time: 5 minutes

It is not difficult to invest a lot of money in premium quality high-tech windows for your home. But if they’re installed poorly, the look of your interiors will suffer – as well as your living comfort.  And what is crucial when you want to successfully install new or replace old windows in your home? Correct measurements! You need to conduct measurements exactly right in order not to be left with a beautiful new window that doesn’t fit.  Seems obvious, right? However, it is not quite as simple as it sounds.

Downsides of wrongly measured windows 

Finding the correct size of your dreamed windows is not a difficult task – but it’s critical to get the accurate measurements. Windows that are measured properly are much easier to install than windows that aren’t the right size. In case of the latter, you might encounter problems, such as not  enough space to level and plumb the window. Then the material will have to be cut away or the window will be placed in a crooked way. If, on the other hand, there is too much space, it will be hard to lock the windows into place properly.

It’s obvious that buying the incorrect size of windows will waste a lot of your precious time and money. What is more, if you do not pay attention to accuracy while measuring a window, you will risk having it installed improperly. And this results in energy losses and… higher energy bills. So if you hope to reduce the amount of energy lost through your windows, improve the comfort of your home and save money – get correct measurements before ordering your new windows!

Measuring windows without mistakes

Fortunately, with proper advice, installing a new window or replacing the old one doesn’t have to be troublesome. Following some basic guidelines and tips from experts will help you make the process smooth and simple. We asked our best window fitter in Ireland, Marcin Wojtyczko , for a short mistake-free guide on how to measure windows for your home. Equipped with a measuring tape and a pencil, you can get down to work! 

Installing new windows

According to Marcin, in case of new building and new windows, you should measure the  width and the height from one edge of the brickwork to the other. Do not measure your existing window frame, but measure the brick opening. Measure brick to brick in at least three different places, and deduct 20 mm from the final width and 10 mm from the final height measurements. You should do the latter to allow for fitting tolerance around the new frame.

Replacing old windows

When it comes to replacing the old windows with the new ones, you should always go outside to record your window measurements. The height and the width should be measured from one edge of the brickwork to the other. It is important to add 10 mm to the final width. In case of the height, you should measure the window tightly up to the cover strip (which itself is not measured). To ensure your measurements are accurate, always take internal measurements as well. It is necessary as window linings sometimes give different results. So it’s a matter of measuring everything accurately, after checking inside and out.

Usually, customers who order installation services at Fenbro, do not have to leave the house to measure their windows. They only have to take internal measurements, always from one edge of the brickwork to the other and from the top edge to the window sill. Based on these dimensions, they can get a quote. If they are interested in our offer, Marcin does the measurements anyway, when he comes for the first visit before ordering.

More tips to keep in mind

Taking all what Marcin said above into account, you should also remember about a few necessary details that will help you take measurements in the most effective way. First, always use metric [mm]  rather than imperial [inch] measurements. Why? Simply because they are more accurate. Besides, most window manufactures and suppliers will convert your measurements to metric anyway. 

Secondly, never use your old window frame as a reference. The frame could have warped over the years, and taking measurements from it would be a serious mistake. And last but least, double check each measurement to be sure of the numbers. If the measurements are incorrect, the quote you’ll receive will not be the accurate one. What’s even worse, if you measure windows by yourself, wrong numbers will result in a wrong window delivered to your door. 

Professional measurements offered by Fenbro

Correctly conducted measurements and precision during window installation is crucial for achieving the best results. That is why choosing the right window installation specialists in your area is important. If you decide to order Fenbro windows from Poland and fitting service in Ireland, you receive a full warranty for the fitting as well as the installation and after-sales support. In case of installation conducted by us, you have a warranty that the dimensions of the joinery you receive will be correct. Our fitter will measure the openings before your purchase and we take full responsibility for the correctness of the dimensions of the joinery ordered. 

We highly recommend ordering our products together with the fitting service.  Why? If the fitting is not carried out by us, we are not responsible for the conformity of the dimensions you provide us with. We do not take measurements before the purchase and we cannot be held accountable for any possible discrepancies between the numbers you give us and the actual dimensions of the window opening. As a result, you may be required to pay for the window that doesn’t even fit. It really isn’t worth the hassle, is it?

Final thoughts

Windows don’t last forever – that’s a well-known fact. Whether you decide to refresh yours to modernise the look of your home or to save yourself some money on energy bills, getting accurate measurements is simply a necessity. You do not know how to find the best window fitting experts that you can trust your windows with? Go to their Facebook or Google profiles and look for customer reviews – on the basis of the latter you will learn how experienced these professionals really are. The opinions our customers leave about Marcin and his team’s work should clear all your doubts!

Read more

Tips & Advice

7 min read

Thermal insulation and sealing — how does it affect energy efficiency?
Tips & Advice

8 min read

Importing building materials from Poland — everything you need to know about the process
Industry News

4 min read

Breaking news: Fenbro fitting services now available in the UK!
Our Services

8 min read

How much does window installation cost? Understanding the costs of professional window fitting
Tips & Advice

8 min read

Replace standard old windows with sliding patio windows — transform the look of your home!
Tips & Advice

6 min read

At what height should windows be installed — a guide to optimal window placement
Industry News

8 min read

How much do new windows cost? Check what factors influence window prices
Tips & Advice

6 min read

Modern front door styles – design inspirations from the Experts
Tips & Advice

7 min read

Replacing sliding doors in your house — a step-by-step guide introduction
Tips & Advice

5 min read

Setting windows to winter mode: how and when to do it
Industry News

8 min read

Best selling windows and doors in 2024 – new trends and our customers’ most loved products
Industry News

8 min read

Grants for replacing windows and doors – how can you benefit in 2024?
Industry News

3 min read

Popular construction summits in Ireland and the UK: Where to go?
Industry News

7 min read

Get to know our window fitter better! Interview with Marcin Wojtyczko
Our Services

9 min read

Selecting windows and doors for secure and modern office buildings
Tips & Advice

11 min read

12 questions to ask before buying sliding doors
Tips & Advice

8 min read

Does EU joinery comply with the UK safety standard PAS24?
Tips & Advice

7 min read

Which side and direction should a door open? Decide before you buy!
Products Guide

9 min read

Joinery glossary explained – everything you need to know about window and door parameters
Tips & Advice

7 min read

Choosing the right colour for your new windows
Products Guide

9 min read

8 different types of window panes for your home
Tips & Advice

8 min read

How to properly measure for a front door – Our Expert has the answer!
Tips & Advice

10 min read

Building regulations for windows and doors in UK and Ireland
Tips & Advice

4 min read

Is it worth replacing house windows and doors during a major renovation?
Tips & Advice

5 min read

Protection against external noise – the benefits of acoustic doors
Tips & Advice

5 min read

What is the FENSA certificate and what is it required for?
Products Guide

8 min read

Wikęd front doors – what distinguishes this manufacturer’s door models?
Tips & Advice

8 min read

How can the front door improve the BER rating of your house?
Tips & Advice

4 min read

What is the difference between HST and PSK sliding doors?
Tips & Advice

5 min read

Modern smart-slide doors – an alternative to traditional door solutions
Our Services

6 min read

Benefits of choosing Fenbro over your local window and door suppliers
Tips & Advice

5 min read

Following the trend of frameless windows – freedom and elegance
Tips & Advice

4 min read

Standard window sizes – which are used?
Tips & Advice

8 min read

How does Fenbro prepare a quote for a window and door order?
Products Guide

6 min read

Aluminium or uPVC? How to choose the best material for your windows and sliding doors?
Tips & Advice

6 min read

Looking for the cheapest windows? Here’s how to save on importing Polish windows!
Our Services

7 min read

10 reasons why Fenbro customer service gets 5-star ratings!
Products Guide

6 min read

Main differences between casement and tilt and turn windows – pros and cons
Products Guide

6 min read

Window glazing explained – types and functions
Our Services

5 min read

How much does the warranty on doors and windows from Poland cost?
Tips & Advice

7 min read

How to choose the best replacement windows for your house
Products Guide

7 min read

5 points to consider when buying garage doors
Our Services

8 min read

Buying windows online – how to protect yourself from window company scams?
Industry News

5 min read

Poland is one of the world leaders in window and door joinery – here are the reasons and causes
Tips & Advice

6 min read

Most common window types – how do they actually differ?
Products Guide

5 min read

Everything you need to know about bifold doors – pros and cons
Tips & Advice

8 min read

When is it time to replace windows at home? 10 useful tips
Products Guide

5 min read

Simplicity and minimalism in the interior design – new steel-look window and door systems
Our Services

6 min read

Why is professional window replacement better than DIY?
Tips & Advice

7 min read

Everything you need to know about building a house and choosing windows and doors for it
Products Guide

5 min read

Anthracite grey RAL7016 windows: Why are they so popular?
Tips & Advice

6 min read

Features of good windows – what to look for when choosing them
Tips & Advice

6 min read

Guide to Velux window sizes: Choosing the right size for Your home
Products Guide

6 min read

A guide to Passive House Windows
Tips & Advice

6 min read

What makes French doors special? Why are they so popular?
Tips & Advice

6 min read

Double glazing vs Triple glazing: Which is better?
Tips & Advice

6 min read

Can windows and doors make your home more energy efficient?
Tips & Advice

6 min read

How to ensure that there is plenty of natural light in the house?
Tips & Advice

6 min read

Foggy windows? 12 ways to get rid of window condensation
Tips & Advice

5 min read

How to choose the right door colour to match the style of your home? – Advice from the experts
Products Guide

5 min read

The comparison of uPVC, aluminium and wooden windows – facts and myths
Products Guide

7 min read

How to choose the best windows and doors for the UK weather – useful tips to know before you buy!
Tips & Advice

4 min read

Comparison of inward and outward opening windows: advantages and disadvantages
Our Services

7 min read

9 Questions you wanted to ask Fenbro Joinery Experts – Q&A
Tips & Advice

6 min read

How to save on heating costs? Window replacement as a way to lower your energy bills in winter
Products Guide

4 min read

What defines premium uPVC sliding systems?
Products Guide

4 min read

Protect your home against all weather conditions with stylish looking alu clad windows!
Products Guide

5 min read

Prolong summer and let more sunlight into your home! Get to know new aluminium sliding doors from Fenbro
Tips & Advice

5 min read

How to effectively reduce outside noise in the comfort of your own home?
Industry News

4 min read

Every satisfied customer is the best reward – Interview with Paweł Brodzik, CEO of Fenbro
Products Guide

4 min read

A great idea for a chill zone in your garden – Aluminium pergolas in the Fenbro offer
Our Services

5 min read

How to transport windows from Poland
Products Guide

5 min read

Why is it worth investing in WIKĘD front doors?
Tips & Advice

5 min read

What are the differences between PVC and uPVC?
Tips & Advice

6 min read

Window maintenance: what you can do to extend the life of your windows
Industry News

5 min read

Why should you buy windows and doors from Poland? We explain the Polish joinery phenomenon!
Tips & Advice

7 min read

Choosing the right windows – basic parameters and cost-optimisation
Tips & Advice

6 min read

How to assess the quality of insulated glass? A mini guide for window buyers
Our Services

4 min read

Window replacement and installation – Fenbro services in Ireland

Ask our sales Team!

Have any questions?

Follow us on social media

facebook instagram youtube linkedn pinterest twitter Hover
Remove all
Compare products