Hi,
My brother has a 1920's house which has suffered from damp for a few years. The kitchen is being replaced and on removal of the units the damp became apparent and needed sorting before the new units went back.
he had a damp proofer out and we were informed that an injection damp proof course needed to be done and that the internal bonding coat and plaster needed hacking off, the damp course needed to be carried out then a cement render applied, followed by a finishing skim to make it look nice. The wall in question is a solid (no cavity) red bricks wall approx 8" thick.
I have done a fair bit of plastering in my house and a bit of rendering externally, so offered to help him out to save him a few quid.
The existing plaster has been knocked off and the pointing seems poor and some bricks are loose and various 'objects' found in the wall have been removed which has left a few voids which will need sorting out. Also the brickwork is quite uneven with some bricks sticking out about 10mm in places.
The question i have is, how would you best approach the job? Would you repoint the brickwork and fill the voids etc before hand, then attempt the rendering another day, or work the render into the gaps etc as you go along? Also, seeing as the wall is so uneven, would you apply 1 thick coat of render, or a scratch followed by a float coat, finishing with a skim?
Finally, I realise a water retarder, plasticiser is needed to protect the skim from damp/salts coming through and add some protection, i have also seem lime being recommended. Would anyone be kind enough to give me there opinion on the best mix to use in this situation.
Finally, when you suggest wetting the wall down, would you hose it down with a fine mist type spray, even internally? I can imagine the bricks being quite porous.
Thanks for your time, sorry for the long post!
Sam
My brother has a 1920's house which has suffered from damp for a few years. The kitchen is being replaced and on removal of the units the damp became apparent and needed sorting before the new units went back.
he had a damp proofer out and we were informed that an injection damp proof course needed to be done and that the internal bonding coat and plaster needed hacking off, the damp course needed to be carried out then a cement render applied, followed by a finishing skim to make it look nice. The wall in question is a solid (no cavity) red bricks wall approx 8" thick.
I have done a fair bit of plastering in my house and a bit of rendering externally, so offered to help him out to save him a few quid.
The existing plaster has been knocked off and the pointing seems poor and some bricks are loose and various 'objects' found in the wall have been removed which has left a few voids which will need sorting out. Also the brickwork is quite uneven with some bricks sticking out about 10mm in places.
The question i have is, how would you best approach the job? Would you repoint the brickwork and fill the voids etc before hand, then attempt the rendering another day, or work the render into the gaps etc as you go along? Also, seeing as the wall is so uneven, would you apply 1 thick coat of render, or a scratch followed by a float coat, finishing with a skim?
Finally, I realise a water retarder, plasticiser is needed to protect the skim from damp/salts coming through and add some protection, i have also seem lime being recommended. Would anyone be kind enough to give me there opinion on the best mix to use in this situation.
Finally, when you suggest wetting the wall down, would you hose it down with a fine mist type spray, even internally? I can imagine the bricks being quite porous.
Thanks for your time, sorry for the long post!
Sam