Wall detail for extension on TF build

[LA3222]

This has been pickling my brain for a while now - I can't be the first person to have done this so there must be a standard way of detailing it all.

 

My house has a main structure for want of a better description and then a smaller bit on the side as an 'extension'.  If I build in TF but put a brick skin on it which is my preference, how does the interface between the two parts work?

 

As I see it now the wall make up will be TF, 50mm cavity, brick, 50mm cavity, TF.  Is there a simple answer to this?

 

Normally the dpm at the bottom would be lapped and sloped so as to push moisture out to the external Wall?  Where does the moisture go in this situation?

 

Like I say, this has me pickled....I can't see it, if someone can lift this fog it would me much appreciated. ?

[ProDave]

You build the entire structure of timber frame, regardless of how many and what shape "extensions" there are.

 

Then you enclose the whole structure in brick or block.

 

Don't over think it.

[LA3222]

Ha.  Over thinking is part of the self build game isn't it?

 

What puzzles me is how do I carry the block work up on the gable where it goes across the join where the extension is attached to the main structure?  Have a steel running the full width to build On?

 

I will draw a picture later, as they say a picture paints a thousand words!

[PeterW]

Yes - steel or TF lintel supporting the gable blockwork or brickwork.