Damp Proofing before Rendering

[shammyk]

Hi All

I would appreciate any advise you can give, i have stripped all the walls in my house to bare brick, some of the extranal walls are showing signs of water coming in. i am concerned that once i have had them rendered and plastered they may let damp through and start discolouring the walls.

i wanted to address this issue before i had all the walls rendered, can someone please advise

i have read something about PVA coaght first but i am unsure exactly what that is and what it will do

i plan to use render thats 3 parts sand and 1 part cement. Is this sufficient to keep the walls from bleeding water or is a different render mix better

i would appreaicte any help you can give me

Thank you

 

[Johnmelad]

What is your pointing on the outside like? Is the roof sound, inc chimney?

Take a look here for rendering advice.

//www.diynot.com/wiki/plastering_and_rendering

 

[Blagard]

i have read something about PVA coaght first but i am unsure exactly what that is and what it will do

I am not sure if your post can be moved to the plastering and rendering forum but the answer to your question about PVA is that it is nothing more than a bonding additive. It also has the effect of reducing suction on some walls prior to applying a render or plaster. It is not a waterproofing agent.

 

[shammyk]

Thanks for your Posts guys

much appreciated