How to attached studwall with cavity with no ceiling connection

[Bruce]

We are currenly insulating and external wall with a timberframe and a cavity to the studwall, the goal is to not to attach the fram to the brick att all if possible. The crux is that the wall is under a window and then it ends at a door so no ceiling nor no side connection.

 

Does anyone have an idea on how to build this without making it super wobly? I guess we need to attach it somehow to the wall but I'm not sure how to do that and make it BC compliant. To the left and above the window we have steel that we can potentiall connect to. Is there any spacers that can do the job or can the window board just do it all? Though that doesn't stop the wall from movin away from the brick wall. 

 

[ProDave]

Why don't you want to attach it to the wall?

[Bruce]

7 minutes ago, ProDave said:

Why don't you want to attach it to the wall?

To avoid leading any pentrating water/moisture that comes through the brick to the timber frame as per BCO demands.    

[Big Jimbo]

If you put a bit of DPC behind the bracket, and a squirt oif silicon in the screw hole, how is any water going to get to the timber frame ?

[Bruce]

11 minutes ago, Big Jimbo said:

If you put a bit of DPC behind the bracket, and a squirt oif silicon in the screw hole, how is any water going to get to the timber frame ?

That souunds like a good sollution. I was somehow fixated on using a timber batten as a bracket which aboviusly they where not happy with. Your sollution with a steel bracket I didn't even think of.

[Bruce]

On 03/02/2026 at 13:18, Big Jimbo said:

If you put a bit of DPC behind the bracket, and a squirt oif silicon in the screw hole, how is any water going to get to the timber frame ?

BCO have clairfied that they expect any wall ties to have sufficient slope towards the external wall or have a drip in them. We intend to use the below type combined with DPC which hopefully gets their approval.