Another rising damp thread?!

[Munzy]

Hi guys,

I have a section of wall that is damp to the touch. This is a stone and brick wall in a building dating back to late 1700’s. Interestingly it is only the last metre or so of the wall that suffers, the rest running across the house seems to be fine. I’ve added some photos of both sides of the wall, you can see the tide mark on one side quite clearly.

The wall is sat on earth and up until two months ago was concrete rendered with rippled and peeling wallpaper over the top of that. Since removing the render the damp feeling which almost reached to first floor level has drastically reduced down to about 600mm.

You’ll note from the photos that the wall has sunk over the years, I’m not concerned since it hasn’t moved in the last 40 years.

I’m assuming this is damp rising up through the bricks (and stone) due to there being no damp proofing.

So, onto a solution.

This area is going to be boxed in to hide a new soil pipe so the wall won’t need to be rendered or covered helping it to breathe. Is it worth me using some sort of injected damp proof chemical to stop the wicking of moisture from lower down? Will this work with the wall being not just brick but stone?

Any other suggestions?

Thanks in anticipation!

 

[flameport]

injected damp proof chemical

No.

It's managed perfectly well for the last 200+ years without any.
Why would it need some now?

 

[Munzy]

No.

It's managed perfectly well for the last 200+ years without any.
Why would it need some now?

That’s my thinking!

 

[bobasd]

rake out the beds an perps on both sides to 30mm an use a 3:1
sand an lime mix to point up.
use the same mix to render bothsides to as high as needed eg 1m.
but maybe remove all cement renderin from both sides an replace?
remove the rusted corner bead all the way up an replace with a plastic corner bead.
the bottom of the door frame an the skirtin might be rotted?

 

[Munzy]

rake out the beds an perps on both sides to 30mm an use a 3:1
sand an lime mix to point up.
use the same mix to render bothsides to as high as needed eg 1m.
but maybe remove all cement renderin from both sides an replace?
remove the rusted corner bead all the way up an replace with a plastic corner bead.
the bottom of the door frame an the skirtin might be rotted?

All sound like good ideas but as it’s being boxed-in it doesn’t need to be rendered at all so can breathe away within the frame.