I have messed up

[Nath89]

When I moved in there was a damp spot up one side of the the chimney breast I hacked away and found it had been patched up with plasterboard. The wall is lime mortor and lime render with what looks like normal plastering top. I have inserted Dpm inside and out But here's were I messed up I have rendered up to the lime render with sharp sand and cement firstly I put two coats of pva then two coats of render first 4:1 second 5:1 both scored on the surface and if that wasn't enough I hadn't put a corner beed on

What shal I do now? top coat still green.

Thanks nath

Untitled

• Nath89
• 7 Aug 2013
• 1

 

[Alastairreid]

You dont need a corner bead!

You can form the corner using a straight edge.

 

[Nath89]

Thanks so you don't think it's worth the hassle taking it off, will it be ok as the render has no lime?

Thanks nath

 

[dann09]

Nath 89,

We use corner beads on everything, its quick, provides a screed for ruling off, and simplifies the skimming.




But, as above, dont take anything off, work with what you've got.

Have you swept & smoke tested the flue(s)?

Why not use a 9" x 9" hit and miss vent in the c/breast?

What do you mean by Dpm ( a membrane? Or a DPC?)

Dont worry about what kind of sand you used.

Its necessary to find the cause of the damp, perhaps its soot in an unswept flue - research damp in c/breasts on here and the building forum.

 

[Nath89]

Hi thanks for the info dan 09

The damp was coming from out side were the sheeting 4" had stopped because of a wall what was butted up the the house, I've chopped the wall back and insured more 4" damp.

Inside I bricked the fireplace up put the air brick in and plan to put pepper pots on top and just have a electric wall mounted fire.

I got paranoid about putting cement over lime I have more bits to render and fill. Would 5:1:1 be better next time or something ready made like browning?

 

[dann09]

I still dont understand the damp issues.

Use whatever sand and lime or cement you have at hand, just put it on - skim with board finish.

Dont use browning, stick with render.