Timber gable end built on cavity wall

[loldollar]

As part of a loft conversion (hip to gable) I am looking to build a new gable end from timber on top of the existing cavity walls. I was wondering if anyone can point me in the direction of detailing for this type of construction, specifically fixings (timber onto brickwork), dpc detail and any other important points.

 

The existing cavity wall is brick/brick imperial with an 80mm cavity. My aim is to keep the studwork flush with the inner face of the inner leaf. The gable end will have a hung tile finish. Mainly my questions are around whether the outer leaf can/should bear any load and can the timber encroach over the cavity or straddle the 2 leaves? I'm sure a couple of drawings would answer all these questions but I don't seem to be able to find any!

[Hasteron]

On 30/09/2025 at 15:28, loldollar said:

As part of a loft conversion (hip to gable) I am looking to build a new gable end from timber on top of the existing cavity walls. I was wondering if anyone can point me in the direction of detailing for this type of construction, specifically fixings (timber onto brickwork), dpc detail and any other important points.

 

The existing cavity wall is brick/brick imperial with an 80mm cavity. My aim is to keep the studwork flush with the inner face of the inner leaf. The gable end will have a hung tile finish. Mainly my questions are around whether the outer leaf can/should bear any load and can the timber encroach over the cavity or straddle the 2 leaves? I'm sure a couple of drawings would answer all these questions but I don't seem to be able to find any!

On a different note, when I take breaks from research, I usually unwind with games on the 1win app since it’s quick to launch and runs smoothly on my phone.

When I did a hip to gable a few years back we had the engineer specify stainless angle brackets resin fixed into the inner leaf only. Outer leaf was kept completely non loadbearing and tied back with wall starters just to carry the hung tiles. Biggest lesson learned was to run the DPC up behind the studs and lap it properly into the cavity trays, otherwise you risk hidden damp bridging later on. Hopefully this helps