Casement windows are among the most popular window styles in the UK. We’ve previously discussed storm vs. flush casement windows. Today, we’re concentrating on how replacement casement windows can improve your home’s energy efficiency while enhancing its appearance. Here, we provide a step-by-step casement window replacement guide, to help you achieve a perfect fit.
The Types of Casement Windows
If you are replacing your casement windows, you must first know which type you are dealing with. After all, a triple casement windows replacement isn’t quite the same as a single casement window replacement.
A casement window is any window that opens and closes on a hinge rather than panels that slide over each other (sliding sash windows).
While the two main types of casement windows are flush and stormproof, there are subtypes that you should be aware of.
Single Casement Window
The most basic design, a single casement window, features a single pane of glass in a frame hinged on one side. Single casement windows open outwards like a door, ideal for uninterrupted views. They also offer fantastic ventilation.
Double Casement Window
Sometimes called French casement windows, double casement windows have two panels side by side. They each have a hinge, so you can open one or both together to allow for better airflow.
Triple Casement Window
As you may have guessed, triple-casement windows comprise three window panels. Typically, the middle panel is fixed, while the outer panels open outwards on separate hinges. You can have one or both outer panels open for ventilation and they usually open wide for easy cleaning.
Push-Out Casement Window
One of the most popular designs for modern homes, push-out casement windows have a lever or handle that enables the user to open the window outward. They are easy to operate and perfect for families or those with additional mobility or dexterity needs.
Top-Hung Casement Window
Unlike most casement windows where the hinges are on the side, top-hung casement windows have top hinges. This feature enables the bottom of the window to swing outwards when opened, allowing airflow even in bad weather.
Step-by-Step Guide for Measuring Casement Windows
The best tip we can give you if you are measuring casement windows is to measure the opening the window fits into, brick to brick, rather than the frame. This is because the original frame could have been badly fitted, or warped and expanded over time if it was timber.
Secondly, take the measurements from outside of the building to ensure maximum accuracy. The steps are the same for a casement window sash replacement as a like-for-like casement replacement specifically because you measure the opening and not the frame in situ.
Bearing that in mind, here is our step-by-step guide on how to measure casement windows.
Step 1: Measure the Window Width
Take Three Measurements:
- Make sure the tape measure is held straight and taunt. Enlist help if you aren’t sure or are measuring a large area.
- Measure the width of the window at three points: the top, middle, and bottom of the window frame.
- Place the tape measure from the inside edge of one side of the frames to the inside edge of the opposite side.
Record the Smallest Measurement:
Use the smallest of the three widths for accuracy, ensuring the replacement window fits snugly. The industry standard window measurements are in metric millimetres, so convert your results if that is not the case.
Step 2: Measure the Window Height
Take Three Measurements:
- Measure the height of the window from the left, centre, and right sides.
- Start at the inside edge of the top frame and measure down to the window sill (the flat surface, not the trim).
Record the Smallest Measurement:
Use the smallest of these three measurements to account for variations in the frame.
Step 3: Measure the Window Depth
Check the Frame Depth:
- Measure the depth of the window frame from the inside edge to the outside edge.
- Standard replacement windows require a minimum frame depth of 3 1/4 inches.
Verify
Ensure the depth allows for proper fitting of the replacement window.
Step 4: Inspect for Out-of-Square Frames
Checks:
- Measure from the top-left corner to the bottom-right corner and then from the top-right corner to the bottom-left corner.
- If the two diagonal measurements differ by more than 1/4 inch, the frame is misaligned and no longer square. This can be caused by a building shifting naturally over time. However, it can cause issues with installing replacement windows, so inform your manufacturer/installer at the earliest possible opportunity.
Plan for Adjustments:
- Inform the installer or account for adjustments in your measurements. For example, some manufacturers request a 5-10 mm deduction from the brick-to-brick measurements (called tolerance), to accommodate installation and shifting over time.
- This can be tricky to get right if it’s a DIY window replacement
- Too little tolerance and the window may not fit properly after the sealant has been applied
- Too much tolerance and the window will have tiny gaps between the frame and wall, letting warm air escape and reducing energy efficiency
Step 5: Record and Double-Check Your Measurements
List All Dimensions:
- Record the smallest width, height, and depth, and make notes about the diagonal measurements or out-of-square frames.
Verify Your Data:
Double-check each measurement to avoid ordering the wrong-sized replacement window.
Bonus Tips:
- Clean & Clear: Remove any debris and clean the window before you measure, to ensure 100% accuracy.
- Tools Needed: Use a metal tape measure for the most accurate results. You can also make small marks with a pencil to help you measure. You could also use a laser measurer if you happen to have one.
- Teamwork: If the window is large, have someone assist you in holding the tape measure or making the marks.
- Take multiple measurements: the old saying goes ‘Measure twice, cut once’. You should take the measurements at least twice or three times before you proceed with the replacement.
- Note Obstructions: Look out for locks, handles, or other hardware that may affect the measurements.
Why Choose Manchester Window Factory?
Hiring a professional, such as one of the expert in-house team of fitters at Manchester Window Factory, means that we take all the hassle out of your casement window replacement.
We will visit your property and take the correct measurements ourselves, before drawing up your unique quote. In the unlikely event, there are any issues, we will fix them.
Casement window replacements in Manchester and the surrounding areas are one of our most popular services. We offer a high-quality product at an affordable price. We will help you to design the ideal casement windows to suit your needs.
We can then install the windows and perform all the necessary safety and energy-efficiency checks, for your peace of mind. We’ll even clean up after ourselves, it’s all part of the service.
You can read some of our many positive reviews on TrustATrader and CERTASS.
Why Should You Replace Your Windows?
There are a couple of reasons you may want to replace your casement windows. Firstly, if they are not functioning properly, such as causing draughts or condensation, they may need to be replaced.
Secondly, they may just be due an upgrade.
Depending on when your casement windows were fitted, they may be single-glazed. Single glazing is no longer considered suitable for a UK home and is being phased out across the country.
There are several issues with single glazing, including:
- Poor energy efficiency
- Lack of insulation
- Inadequate ventilation
- Does not protect against noise pollution
- Not as secure as double or triple-glazing
It’s not just the glazing that is likely to be old-fashioned in previous models. New casement windows offer better security and easier opening, require less maintenance and cleaning, and greater energy efficiency.
The Benefits of Casement Windows
Casement windows offer many benefits to homeowners. From energy efficiency to uninterrupted views, here are a few reasons to install replacement casement windows.
Energy Efficiency
One of the main advantages of new casement windows is that they are highly energy efficient. Our casement windows use Argon gas between the panes of glass to increase insulation and energy efficiency. The airtight seals lock in heat while allowing proper airflow to retain warmth and reduce heating bills.
Less heat loss also means fewer carbon emissions, so you’ll also reduce your carbon footprint. Double and triple glazing increase your window’s energy efficiency, but you can also choose Planitherm windows, which include a low-E coating.
Our timber casement windows are made with sustainably sourced woods and we believe in green manufacturing practices wherever possible.
Excellent Ventilation
The style of casement windows means that, when fully opened, they ‘scoop’ fresh air into the room, improving ventilation and air quality in your home.
Unobstructed Views
Slim frames and large glazed areas combined with the outward opening mean casement windows are perfect for providing uninterrupted views.
Increased Natural Light
These slim frames and single panes of glass also allow lots of natural light to flow through your home.
Easy Maintenance
You can usually access both sides of the glass from inside the room, making casement windows much easier (and safer) to clean.
Secure Locking Mechanisms
Older casement windows lack the same level of security as their modern counterparts. Our windows include multi-point locking systems, with laminated glass available for extra privacy and security.
FAQ’s
In some cases, old casement windows can be repaired rather than replaced. It largely depends on the level of damage, the age of the windows, and any other factors, such as the level of original glazing.
Besides the level of damage, the decision on whether to restore or replace is down to you. However, a qualified fitter can advise you and explain which is best in your case.
If costs are a concern, it is better to restore, where possible, to save money and retain the original window’s integrity.
However, repairing the original window may not offer all the advantages of a newer model.
The average cost of a casement window is between £335 and £600. Prices vary depending on the materials used and the size of the windows. This price does not include installation.
When considering casement window replacements, you must weigh the initial cost against the potential savings.
Your budget should include the cost of the units and installation. It is always a good idea to hold some back to pay for any unforeseen issues.
This initial outlay should be weighed against savings of up to £235 a year off your heating bills for switching to energy-efficient A-rated double-glazed windows.
You should also factor in the lack of maintenance and cleaning required, which saves you time and money in the long run.
Depending on the ceiling price of your home, new casement windows can also potentially increase the property value. It’s a good idea to check with your local estate agent before committing to any significant renovations.
