Fitting a Cat Flap In Glass, Double Glazing or Cavity Brick Wall?

Being a professional cat flap fitter, I frequently get posed the inquiry of what is ideal – having a cat flap fitted in double glazing/glass or cavity brick wall? 

Since I am a trained glazer, I often lean towards a glass installation. There are several advantages of having a cat flap in the glass over going through a wall. The choice, ultimately, is yours to make. 

Brick Installation 

Here’s all you need to know about installing a cat flap through a brick wall: 

  • It can be a DIY project as anyone with the proper skills and tools can install a cat flap through a wall. This, however, isn’t possible with a double glazed window
  • Installing a cat flap through the brick wall is, however, time-consuming, messy, and can be very stressful. Also, you need to be sure that no wiring and services are in the wall before bore the brickwork out 
  • If you aren’t confident enough to be able to install the cat flap through a wall by yourself, then you’ll have to hire a qualified builder to do it 

Glass installations are cleaner and cost-effective. You don’t need to worry about vacuuming the debris and dust after the flap is installed. 

Here’s Why Glass Installation is a Good Idea

One of the biggest advantages of having a cat flap installed through glass is that you can put back the original pane of glass into the frame if you plan on moving house, leaving the next tenants with a clean, hole-free panel. 

Having the cavity wall rebuilt is much more stressful, difficult, and expensive. 

Most tenants worry about their security deposit when having a cat flap installed since many landlords don’t allow you to fit a cat flap through a cavity wall. Glass installs are much more convenient in this case. 

Potential house buyers don’t want to buy a house with a hole in the cavity wall! It's permanent and expensive to have filled. 

So, glass installations are a better option. 

When talking about heat loss, both cat flap installation options are equally draughty since cat flaps aren’t energy-efficient. But, that’s the trade-off you must be willing to make. 

All in All 

If you’re considering going through a wall, I advise you to first consult with a qualified builder. Always make sure they have relevant qualifications, building experience, insurance and can comply with all building regulations.