Advice on new render for old house: K Rend, Granicem, Parex, Baumit?!

Hi all,

New to the forum and not a professional. Not even a DYIer, just researching for my house project.

Extending the property plus re-rendering it. We had penetrating damp problems on an external wall (bricks, no cavity) which used to be covered with pebbledash. No obvious cracks and nobody could find the likely source, so in the end we were advised to re-render. The wall is south facing, but very close to the next door house. The wind seems to often blow the rain against it (the front part of the house is sticking out compared to next door and this is the bit where the problem was).

The architect specified the use of K Rend, but I prefer the opinion of professionals (you. hopefully! ;-)) on this. The builder has priced for K Rend, but says he has never used it. He talked about having used a Renotex product and Stoneshield. I think he said that they are comparable products, but upon researching them, that doesn't seem the case to me.

Anyhow, I have researched a bit K Rend and I am not convinced it is the best option. Problems that I have seen mentioned are algae and the fact that it cannot be patched up (but also, it shouldn't really crack if applied correctly). Also, often I see that it is recommended to use K Rend only when there is previous experience with the product, or else the result cold look rough.

I have read several posts and have seen that other products have been mentioned: Granicem, Parex, Baumit, Mapei. Given what I have said and that we are not too cost sensitive, what is your recommendation?

Any help is really appreciated!

Best
 

pmortonplasterers

New Member
I'd offer some advice - to you , have a look at the renderers previous work , in the same material you are asking for , as a renderer my self I supply addresses to future customers / there is a ream of manufacturers / narrowing you're choice down to a "scraped " finish or a "textured" finish (coloured) could be a good first step - seeing the two different finishes & the pros & cons of each -
Good luck with the project


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Jgreenplastering

Private Member
Hi all,

New to the forum and not a professional. Not even a DYIer, just researching for my house project.

Extending the property plus re-rendering it. We had penetrating damp problems on an external wall (bricks, no cavity) which used to be covered with pebbledash. No obvious cracks and nobody could find the likely source, so in the end we were advised to re-render. The wall is south facing, but very close to the next door house. The wind seems to often blow the rain against it (the front part of the house is sticking out compared to next door and this is the bit where the problem was).

The architect specified the use of K Rend, but I prefer the opinion of professionals (you. hopefully! ;-)) on this. The builder has priced for K Rend, but says he has never used it. He talked about having used a Renotex product and Stoneshield. I think he said that they are comparable products, but upon researching them, that doesn't seem the case to me.

Anyhow, I have researched a bit K Rend and I am not convinced it is the best option. Problems that I have seen mentioned are algae and the fact that it cannot be patched up (but also, it shouldn't really crack if applied correctly). Also, often I see that it is recommended to use K Rend only when there is previous experience with the product, or else the result cold look rough.

I have read several posts and have seen that other products have been mentioned: Granicem, Parex, Baumit, Mapei. Given what I have said and that we are not too cost sensitive, what is your recommendation?

Any help is really appreciated!

Best

The best advice I can give is if your getting it done through your builder make sure you get references of who ever is doing the work or it will be an expensive mistake!
Make sure you check previous jobs and try to speak to home owners who have used them.
Alternately source the renderer yourself and negotiate with the builder for a reduction.
Plenty of good lads on here if you did go that route.

Make sure you use a sealer after to prolong the look of the render. You'll benefit in the long run.

We prefer Parex. Used k rend a couple of times and don't like it.
You'll find most prefer Parex or Weber although there is other products.

ATB


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Hi all, thank you for your replies.

I will look into what finish I prefer (I like it as smooth and fine as possible, and we will have both white and darkish grey as colours).

I have a feeling that the builder wants to render the walls himself. As mentioned, he says he uses Renotex and Stone Shield. Understandably, it sounds as if you guys think that letting him do the job is a risky strategy. Any of you guys cover north London? My problem, though, is that I really doubt that my builder would be willing to shave much off his price if I outsourced the rendering.

Yes, the property is relatively exposed: often the wind seems to blow the rain on the side wall, which is the one that had the penetrating damp problem.

Thanks again.
 

malc

TPF Special Forces
Hi all, thank you for your replies.

I will look into what finish I prefer (I like it as smooth and fine as possible, and we will have both white and darkish grey as colours).



Yes, the property is relatively exposed: often the wind seems to blow the rain on the side wall, which is the one that had the penetrating damp problem.

Thanks again.

there is usually one side of a property that takes all the weather, rain in winter, full sun in summer.
you may consider having an external wall insulation system.

we have recently completed a house that had 3 shades of grey each on different walls as the rear of the house is mainly glass with a mixture of all 3 colours. it was done in parex. acrylic 1.5 grain
 
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