Some damaged roughcast/render needing repaired - some advice please

Share this page

Status
Not open for further replies.
G

gubar

New Member
Hi,


we had some issues with penetrating damp which has been traced to some cracked render (roughcast or pebbledash - from the 1930s, with semi-smooth stones I think, painted over) on the rear wall of the house and the chimney stack. We are in the process of getting quotes to have this repaired.


Both quotes so far have suggested removing and repairing broken sections, using a base coat, a mesh, then the top coat. One said he would use krend, the other didn't specify (I've asked for more information).


One has suggested just patching, the other patching, plus going over all the roughcast on that one wall. So the broken stuff is removed, then the whole wall is gone over for a complete new coat of rough cast.


This would all need to be painted, since the whole house is already painted.


Anything I should be aware of, or look out for when getting these quotes? I've already asked them for a more detailed breakdown of materials and processes, so I can post that back here.


I have read conflicting things online about putting roughcast over roughcast - some suggest it's fine, others that it's not.


I am also unsure of whether the original roughcast was cement or lime based. Is there an easy way to tell, and will this affect what can be put on top?

Also, if anyone here is a plasterer in the Glasgow area, you are welcome to send me a PM if you'd like to have a look and quote.


Thanks for any information,


g
 
What more of a break down do you need? As for r/cast over existing r/cast ....not a problem as long as its solid.......is the existing r/cast painted tho?..
 
if the rough cast is from the 1930s then it is lime based.
it depends what has caused the cracking, if movement of the house it is a fair chance that the brickwork is damaged.
i would carry out a crack repair to the brickwork then repair the render on the wall, it may be better to remove the render completely from chimney stack repair any cracked brickwork and render.
i do not like to use krend, the sand is to soft.
 
I'm in Glasgow but tbh it sounds more trouble that it's worth. You've had 2 people out and given quotes and you're on here asking if there's anything you should look out for.
 
Hack it all off,clean it down,put mesh on cracks,scud it and then two coats of render with waterproofer in it.
 
GrantyBoy said:
I'm in Glasgow but tbh it sounds more trouble that it's worth. You've had 2 people out and given quotes and you're on here asking if there's anything you should look out for.
Click to expand...

Hi,

the reason I am asking, is because I have had two different suggestion, one just to repair, one to repair and re-coat whole side of house. I didn't think it seemed unreasonable to ask for opinions before getting work done - a quick way to get opinions from informed people is to ask in a forum used by experts.

thanks,

g
 
Hi,

yes the house is painted.

GrantyBoy said:
I'm in Glasgow but tbh it sounds more trouble that it's worth. You've had 2 people out and given quotes and you're on here asking if there's anything you should look out for.
Click to expand...


I don't think it's unreasonable to use a forum to ask for a specialist advice. For example, the two people I spoke to had different ideas about what to do - one to remove and patch, one to patch and cover the whole wall. Also, I didn't know whether the old wall would be lime based or not, and don't really understand the consequences of putting modern render over this.

Surely no harm in seeking some impartial advice, and a forum used by experts is surely the best place to do that.

thanks,

g
 
I didn't say it was unreasonable I just said it sounds more trouble than it's worth when you've already had 2 men (presumably specialists) out to quote for the job then go on a forum asking for more specialist advice. There isn't a single right way of doing it there are many different materials and some different methods of doing the job. The best thing to do if you're worried is get a job reference or look at previous work from the guys who took time out of their day to give you a free quote.
 
Gubar....if its painted then I would have concerns coating on top, unless the paint is very well adhered??
Even then tis a gamble....take it all off for peace of mind...thats my opinion..youve had two guys out to have a look and two different opinions and probably price?
as said above ask for references...do your homework..pics of some previous work etc different methods and materials but at the end of the day whoever does the job in the end.... that decision is yours.
is there a big diffrence in price...?
 
A lot of people think that if a tradesman fires (k-rend) into a sentence' well, they must know what they are talking about'. Nothing could be further from the truth!

Fatarm hit nail on head, fresh canvas..
 
Status
Not open for further replies.
Top