Lime to replace blown sand and cement

[Jim85]

Hi looking for some advice on a job I have to price

The customer has a big extension around 5-6 years old which has been sand and cement rendered with no beads up side of Windows to try and give a barn kind of look which looks ok but the whole lot of sand and cement render has left the wall due to the whole extension being built from thermalite block. It's around 230m2 so he wants to get it right this time cos it's gonna cost a fair bit.

He's asking if we can do natural hydraulic lime over it? We have done a fair bit of work on old buildings onto soft red brick and maybe a few concrete blocks where they've made some alterations but never tried going over a lightweight block with it. Also there's a few cracks in the blocks. Is it stainless mesh with this stuff?

 

[Jgreenplastering]

Suction is the problem.
I'd give Parex a ring and ask for a spec they have all different kinds of bagged renders, cementitous, lime based etc.
You can't go wrong then.
Give head office a call and ask for the area rep.
He a come view it, spec it and send you in direction of supplier job done.
You got no comebacks from client then as they will be responsible if it fails and you've done it to spec.


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[User___removed]

No for hydraulic lime straight into thermite's.
Use microgobetis then monorex with tv10 mesh through first pass
If not use webers gear
If not f**k knows

 

[Jim85]

I had a spec for k lime but it's just too much messing about think it went unilit 10 unilit 30 then 2 coats of setting 213 up to 1 meter high then unilit 10 primer then 2 coats of coarse then setting 213 on top above 1 meter.

In other words too much hassle in my opinion.

I was thinking I could just use nhl 2 and sand mix which is for soft masonry but I'm always worried about rendering thermalite with anything. Plus there's cracks in the block work. Probably from water and frost getting into the cracks of the old render.

K rend hpx and full mesh with k1 sprayed on top was my opinion but it's not the look he wants.

Bloody lime

 

[Jim85]

Has anyone used thermaline bagged render?

 

[Jim85]

Thermalime

 

[Jim85]

Take that as a no then. they're sending me a bag of it I'll let you know how it is. Sounds like pretty good stuff it goes onto virtually anything and it can be used inside and out. And it can be spray applied to any thickness and it's one coat finished same day...

Sounds too good to be true

 

[Jgreenplastering]

Take that as a no then. they're sending me a bag of it I'll let you know how it is. Sounds like pretty good stuff it goes onto virtually anything and it can be used inside and out. And it can be spray applied to any thickness and it's one coat finished same day...

Sounds too good to be true

Why don't you ring Parex then or do as Bobby said?
Why ask for advise and ignore it?


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[Jim85]

Have done now. Im getting the parex spec emailed to me. I'm not ignoring anything. I'm trying to give the customer a lime render finish that he wants because he was obviously mis led into thinking thermalite blocks are a good thing to render onto externally when he had the place built. I'm going to try and get him to go the mono way but don't think he's going to have it.

 

[Jgreenplastering]

Parex do lime render. If it can be used they will spec it.
If it can't just show the client and he can then pick a new finish


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[Jim85]

Parex have sorted out a spec. I thought it was gonna be similar to the k rend spec but it's a lot better and simpler and I can bed mesh into it all over to try n hold the cracks back.[emoji106]

 

[Jgreenplastering]

Parex have sorted out a spec. I thought it was gonna be similar to the k rend spec but it's a lot better and simpler and I can bed mesh into it all over to try n hold the cracks back.[emoji106]

I knew they would.
What did they spec you?


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[Jim85]

Base coat of 10 mm parlmier Claire with fixopiere then parlmier moyen top coat at 10mm then paraguard. I don't know how I'll explain that to the customer. Do I have to do it with a French accent?

 

[Jim85]

Anglia lime sent me a bag of their thermalime to try out and it seems pretty good. It's a lot like bonding to spread and it's got fibers in it and it floats up nice aswell. And it's light. Great for old buildings. And it goes on at any thickness in one coat. And you can spray it apparently.

 

[Jgreenplastering]

I find a cockney accent works he best, finish it with me old China and he will understand


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