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Hello from Surrey! Need help with External wall now an internal wall.

Rusty_Nutz
in Introduce Yourself

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Hi Build Hub,

Carrying out a rear extension on our detached 1960's house in Surrey.
In need of a bit of advice or guidance regarding the possible need for damp proofing to an existing external wall that now becomes an internal wall after an extension. I plan to keep it as exposed brickwork as attached visual.

image.thumb.png.79f7852f045608fabf66a7c3de22a2fe.png
 

The problem (or maybe it's not a problem) I have is the new extension lower floor level (blue line) is a lot lower then the existing DPC (pink line).

image.thumb.png.2b0f9fc48729b60727e580bf932e5f9d.png

image.thumb.png.c7fd133976164cb8f884f2c53dfd7519.png

 

Is there a chance moisture will run up that external wall and create damp issues? If so, what would be my best course of action? Do I treat it like a basement and tank the wall?
 

Hoping that all made sense.

Many thanks in advance.
 

Edited by Rusty_Nutz

  • Rusty_Nutz changed the title to Hello from Surrey! Need help with External wall now an internal wall.

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