How to install a window yourself

If you want to save energy, replacing your windows is one of the most important measures you can take in your home. Although many companies specialise in this area, many homeowners with some DIY skills choose to replace their windows themselves. Can anyone really handle such a task and what are the potential pitfalls? Here are our practical tips on how to replace windows like a pro!

Why opt for self-assembly?

The most important advantage is financial savings. By installing the windows yourself, you avoid the costs associated with the service, which are often as much as two-thirds of the price offered by professionals. These costs are usually the result of the company's structural charges, social contributions and other expenses that the company has to reckon with.

By using an artisan, you are assured that the work will be carried out to the highest industry standards. In addition, you can often benefit from various forms of state support, such as tax relief or a lower VAT rate. If you carry out the work yourself, you will not be able to benefit from such reliefs.

Replacing windows yourself presents some challenges that you should be aware of. That said, installation is usually straightforward and problems are rare. If you're versed in DIY, you'll be able to handle the task with our installation tips. Don't be shy about asking friends for help either: installing windows yourself is not always easy, especially with larger frames such as bay windows.

The money saved can be used for additional work or the selection of more advanced window models.

How to replace a window step by step

Preparation of tools and materials

Hammer drill
Metal anchors
Expansion bolts
Screwdrivers, hammer
Cordless drill/driver
Bubble or laser level
Mounting foam
Mounting plates
Crowbar, nail extractor
Construction gloves and safety goggles

Window construction elements

Window frame
Double or triple glazed windows
Sash and fittings
Glazing beads
Bottom profile
Additional profile
Imposts (window connectors)
Additional elements: window sills, mosquito nets

Stage 1: Removal of old windows

Disassembly of wings: Open the window and remove the sash.
Frame removal: Remove the trims and frame.
Sill removal: Using a crowbar and hammer, remove the old window sill.

Step 2: Preparation of the window opening

Checking the dimensions: Ensure that the window dimensions correspond to the window opening.
Substrate preparation: Remove old insulation and clean the borehole of dirt and debris.
Priming and wetting: Prime and wet the borehole surface for better adhesion of the sealants.

Step 3: Insertion and attachment of the window

Window insertion: Place the window in the opening and use a spirit level to check for verticality and horizontality.
Mounting: Use metal anchors or wall plugs to fix the window.

Step 4: Sealing and positioning of installation seams

Mounting foam: Fill the gaps with polyurethane foam.
Insulation tapes: Apply waterproofing and vapour barrier tapes to the seams.

Step 5: Installation of window sills

Surface preparation: Clean the outer surface of the concrete shelf.
Mounting: Install external and internal sills according to the instructions.

Step 6: Finishing and adjusting the window

Fitting of fittings: Install fittings and handles as instructed.
Removal of protective film: Remove the protective film from the window.

The most common errors during installation

Incorrect measurements: Incorrect window and opening dimensions.
Incorrect dismantling: Failure to remove old insulation and dirt from the borehole.
Wrong attachment: Incorrect use of fasteners and insufficient fixing of the window.

Cost of window installation

The cost of installing a window depends on many factors, such as the size of the window, the type of materials and the location. On average, prices range from £41 to £130 per running metre.

Summary

Window installation is a process that requires the right tools, materials and knowledge. Therefore, it is advisable to read the above instructions carefully and take professional advice to achieve the best results.

If you have any questions or doubts, you can always consult our specialists at GM PLAST, who will be happy to help you choose the right solutions and provide expert advice.