cracked render repair

[kevspain]

Hi all, I'm after some advice on the consequences of, what is ultimately, a bodge that I'm thinking about carrying out. :RpS_unsure:
The house I live in is about 150 to 200 years old and the render at the back of the house is a mass of small/fine cracks. Theses cracks are only superficial and I know the proper job is to take off the render and have it redone. However, money does not permit this option at the moment and, as I'm rebuilding the house next door, I will probably do the job when I render the new stuff.
In the meantime, I would like to just smarten up the cracked wall until it can be done properly. So, to the point, my idea is to sponge over the back of the house with a slurry of white cement to give it an even texture and then give it a lick of paint.
I know this is a complete bodge and I'm prepared for some of the comments that may come my way but, I'd just like some opinions on things like shrinkage, adhesion, durability, additives, etc.

It might be worth mentioning that the house is in a small, old village in Spain and the original finish is rustic, so there are no worries about having to get a dead flat finish.

Any comments are welcome and, please don't be too harsh with the insults!

 

[Rigsby]

Is it painted?

Make sure the surface is clean and sound then prime with sbr 1:1 water and let dry. Mix up your cement slurry with 1:1 sbr to water and paint on. You might want to put some sand in with it.

 

[lucius]

Don't bother mate just leave it till your ready, ive got a 200 year old house in Spain full of cracks another couple of years wont matter, where abouts are you?

 

[kevspain]

Thanks for the replies. I thought I would get the piss taken out of me something rotten.... I'm almost disappointed! :huh: @Rigsby: Yes, it's painted but I'll wire brush it. Not sure about getting sbr out here, would pva do? @lucius: I'm near Barcelona. How about you? Maybe were neighbours! I want to patch it over before the end of the other job because we sit out there a lot during the summer and it's unsightly. It's not just the cracks, the paint has all fallen off up to about a meter and a half from ground level. Nothing sticks to these old walls... something to do with the high levels of lime in the original construction.

 

[lucius]

Could go on for ever on this one, PVA is a no no,SBR is available in Spain but they don't call it that and for the life of me cant remember what they call it but it will come to me to be honest if you have an old Spanish house built in lime morter that's what you should be using, my place is in Murcia by the way so a long way from you.

 

[spike]

Hi there just purchased an old townhouse in murcia,will need full rendering on the outside,looking for any advice regarding local companies etc,thanks