External render disintegrated at bottom of wall

VincentScar

New Member
38413



Quick question
A solid wall next to a main road - lots of water spray - has blown off at the bottom. The property has not been lived in for over 40 years, so there was little internal induced condensation. However, there was damp around the interior wall connected to the exterior exposed spalled/blown brickwork.
Should I use lime render and let the wall breath or seal it with cement render?
Or are both these useless, there's something better?
Thanks
 

martinemj

Well-Known Member
Yes You could lime render it...
or use one of the bagged renders which have breathability
Pbr parex fassa ect...
 

The Hobo

Well-Known Member
View attachment 38413


Quick question
A solid wall next to a main road - lots of water spray - has blown off at the bottom. The property has not been lived in for over 40 years, so there was little internal induced condensation. However, there was damp around the interior wall connected to the exterior exposed spalled/blown brickwork.
Should I use lime render and let the wall breath or seal it with cement render?
Or are both these useless, there's something better?
Thanks
saturate it in thomsons water seal end of
 

Dacha

Member
View attachment 38413


Quick question
A solid wall next to a main road - lots of water spray - has blown off at the bottom. The property has not been lived in for over 40 years, so there was little internal induced condensation. However, there was damp around the interior wall connected to the exterior exposed spalled/blown brickwork.
Should I use lime render and let the wall breath or seal it with cement render?
Or are both these useless, there's something better?
Thanks
You really need less pearmable render. Unless you want to put new lime render every couple of years. Bagged cement render, preferably with mesh is ok, or some silicone/silicate render.
There is no quick fix.
Condensation should stop forming once someone lives and use heating.
 

007lee

New Member
Is it possible to silicone render onto sand cement render. Sorry for hijack but it won’t let me start a new topic elsewhere. Sorry again
 
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The Hobo

Well-Known Member
View attachment 38413


Quick question
A solid wall next to a main road - lots of water spray - has blown off at the bottom. The property has not been lived in for over 40 years, so there was little internal induced condensation. However, there was damp around the interior wall connected to the exterior exposed spalled/blown brickwork.
Should I use lime render and let the wall breath or seal it with cement render?
Or are both these useless, there's something better?
Thanks
that garden wall butted up against house wall will not be helping
 

worthwords

Member
Does the house have a DPC?. if it's burried under that tarmac then that's not going to help either. Not uncommon for local authorites to trample over DPC and block airbricks when they redo the pavements.
 

martinemj

Well-Known Member
To add what I said above.....

When dry spray render with a breathable watet repellent
prb or fassa do a product for this (follows from what @The Hobo said)

Most repellents need doing every 10 years but in that situation may need to be less
 
What's on the internal side of this wall?
No point in using a lime based product if you have sand and cement or gypsum on the inside it works both ways inside out.
Also have you checked the floor level the tarmac looks high!?
Solid floor or timber if concrete has been added may even need a lime floor
So many if buts and may be's would get it checked over by a local specialist
 
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