Dog and Cat Flaps

Whilst the majority of ‘pet’ flaps are installed for use by cats, there are flaps available to cater for small / medium size dogs. Please note however, Smashing Windows only fit cat flaps or the large cat / small dog pet flaps.

Smashing Windows can install your pet flap in either double glazing or upvc panels, and the type of flap will be dependant on how you want your pet to gain access through the door or window. Smashing Windows will fit these flaps for FREE when fitted into glass or upvc panels supplied by us.

Smashing Windows operates approximately in a 20-25 mile radius from Aylesbury, in the Aylesbury, High Wycombe, Marlow, Milton Keynes, Hemel Hempstead, Watford and surrounding areas.

Types of Pet Flap



approx price inc. VAT
  • 4-way locking
  • No need for electronic chipping of pets
  • Choose to lock pet inside / outside



approx price inc. VAT
  • Only allows your pet in
  • Magnetic collar unlocks flap
  • Stops unwanted pets entering



approx price inc. VAT
  • Activated by pet’s microchip
  • Works with multiple cats
  • Stops unwanted other cats entering the house

There are a number of suppliers who can provide these flaps and they can be purchased through most good pet shops. The most popular flaps that we fit are either manufactured by STAYWELL for the basic and magnetic types, or SUREFLAP for the Microchipped flap. If you would rather us supply them, no problem.

Costs for Glass / uPVC panels

Ok so you have decided which pet flap is best for your pet, but where do you want it installed?

We fit flaps into upvc or aluminium framed doors that are double glazed, either with glass or a flat upvc panel.The most usual place for a flap to be fitted is in the back door, or occasionally the front door, which will either be a full length or a half length glass or upvc panel. However where this is not possible, or desirable, we can fit them into double glazed french doors or even sliding patio doors.

A full length upvc panel, including fitting is £160.00 inc VAT, or £100.00 inc VAT for a half panel, excluding the cost of your pet flap. For a double glazed glass panel you will need to measure the glass you can see (in millimetres) and price it in our window repairs quote system, the links are on the home page, making sure that you select toughened safety glass. This will give you the price for a normal double glazed unit, to which you must add £60.00 inc VAT to have the circular hole created and sealed, plus add the cost of your selected flap. Don’t forget we fit your pet flap for free when buying the panels from us.

OK in summary!

•For a half upvc panel £100 + cost of the flap
•For a full length upvc panel £160 + cost of the flap
•For a double glazed unit £ cost of the unit (see above) + £60 + cost of the flap