Sand and cement scratch coat on solid brick?

mrmeanor

New Member
I have some upstairs rooms where the old plaster has blown on some of the external walls. I've removed it back to the brick.

The property is Victorian double brick no cavity. It's not a damp house, but over the course of 100 years the plaster has inevitably deteriorated.

Can I just use sand and cement scratch coat followed by undercoat plaster? There seems to be conflicting advice about breathability requirements whcih just descend into chaotic threads without any categorical answer. Some cement renders seem to state that they're breathable.
 

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ChrispyUK

Well-Known Member
I have some upstairs rooms where the old plaster has blown on some of the external walls. I've removed it back to the brick.

The property is Victorian double brick no cavity. It's not a damp house, but over the course of 100 years the plaster has inevitably deteriorated.

Can I just use sand and cement scratch coat followed by undercoat plaster? There seems to be conflicting advice about breathability requirements whcih just descend into chaotic threads without any categorical answer. Some cement renders seem to state that they're breathable.

external walls, batten and use insulated PB.

Internals use hardwall.
 
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