Fitting windows and doors is no easy task.  Unless, of course, you’re a trained professional and in which case you’ll probably feel like you can install them in your sleep! 

Aluminium windows and doors are growing in popularity throughout homes in the UK.  This is due to the benefits they can provide as well as aluminium seeing a reduction in price, making them much more cost-effective. 

Now available in a range of different styles, shapes, and colours, aluminium windows and doors are also extremely durable, providing you with a longer shelf-life before a replacement is necessary. 

With aluminium fabrication you can also opt for smaller frames too, maximising the amount of light coming into your home. Plus, aluminium windows are known to provide high thermal insulation, making it a win-win all around. 

In this post, we look at a few of the basic steps needed when it comes to how to install aluminium doors and windows


How to install aluminium doors and windows

Aluminium window and door installation 

Whether you fit aluminium doors or windows to commercial or domestic properties, the installation process is primarily the same. 


Check your measurements – making sure you have your framing measurements exact is vital for the dimensions of the aluminium window/door to be fitted securely. 

To make sure that everything is going to fit, you need to check your measurements precisely and then check them again!  Checking the height and length of the window, as well as the height and width of the actual opening. 

You also need to ensure that the opening is clear and all debris etc is cleared away ready for the new frame to be installed. 


For aluminium window installations, lift the frame into place, making sure not to let it fall through onto the other side (ideally fitting windows and doors should always be a two-person job), and always make sure you have the right tools to hand. 

Probably the most important of which will be a spirit level as you need to make sure that everything aligns correctly. 

To do this, you will need to raise or lower the aluminium frame until it is perfectly level, screwing it securely in place through the guide holes provided. 

You can also use packers to help level up a window, rather than keep removing and reinserting the entire frame. 

Both sides of the frame will also need to be levelled out to, and again once in place, tightly secured by screwing in the guide holes. 

Note: Make sure to cut off any of the shims extending at the ends, ensuring that they don’t go past the aluminium frame. 

The window should also be flush with the internal wall and to help achieve this, you can use a set square, placing this against the wall and then manoeuvring the window to where it needs to be. 

Screw the frame in place, usually at the top, middle, and bottom. 

With the frame securely in position, you can now insert the glass.  Securing in place with a bead of caulking around the entire perimeter. 

Once everything is in place and secured correctly, if you notice any openings or cracks around the frame you can pack these with insulation, stopping hot air escaping and cold air getting in. 

You can also use packers with the insulation, which also makes sure that the reveal won’t bow. 

Just make sure to remember to snap/cut the packers when done so these aren’t on full show and they shouldn’t be seen. 

Everything can then be cleaned off using commercial cleaning agents, and any exterior work can be carried out to make sure everything looks in tip-top condition. 

Find out more here!

Tools for the job 

Having everything to hand is vital when fitting aluminium doors and windows. 

Tools you should include: 

  • Drills 
  • Hammer 
  • Set square 
  • Spirit level 
  • Packers 
  • Tape measure 
  • Safety glasses 
  • Ear defenders, etc. 

Aluminium is extremely lightweight, making it a great metal to work with when installing new windows and doors.  However, it’s recommended that if you are looking to replace your homes windows and doors, that you use a professional supplier and installer to help you get the job done. 

Like the professionals at Crucial Engineering. 

Fabrication Leeds 

At Crucial Engineering, we can provide you with a complete service.  From measuring up, supplying, and installing aluminium windows and doors – our team can offer it all. 

Call us today on 03451 930 420 for a quote and further information about what’s on offer.