Self build homes are often built to high standards of energy efficiency. Usually this includes very thick walls. We are often asked if we can provide Petflaps with trunking suitable for this type of build. The simple answer is yes.
Of course it’s not only self build homes that want to fit a Petflap into a thick wall, but when you’re planning a new house it’s simplest to work the fitting into the build from the outset.
Why extended trunking?
Our standard trunking is 7cm long and suitable for most ordinary doors and windows, including double-glazed units. As long as at least 1cm of trunking extends beyond the door or glass then the fitting ring can be fixed on and all is well.
For a Petflap going into anything from a brick wall or thicker, we recommend trunking long enough to go through, plus 1cm. We recommend this for several reasons:
- the hole through the wall is sealed by the trunking, so bits don’t come away which would compromise the hole and create a mess
- the wall is supported by the light but robust trunking
- the longer models need a second flap at the other end
For trunking of about 20cm or longer we fit a Petflap at both ends. We do this for several reasons:
- there is a lock on the outside, making locking much simpler than reaching to the far end of the tunnel
- it creates a neat finish at the house end of your Petflap
- the Petflap is supported properly at each end under equal force
Fitting two flaps doesn’t increase the Petflap’s draughtproof properties as a single door is enough to do that. It is primarily to support the trunking and make it more pleasant to have emerging into the interior of your house.
How long can you do?
At the moment we can do up to about 60cm. 30-50cm is the most common range we’re asked for.
We can also do just very slight increases. We’ve provided Petflaps with trunking of just 8cm. We can also do shorter trunking.
My architect has questions
No problem. We’re very happy to speak to architects, builders, interior designers, glaziers, fitters and so on. Please give us their number or ask them to get in touch at firstname.lastname@example.org Dimensions and fitting information can be found at Fitting a Petflap and Petflap Dimensions.