lime render

[claw75]

evening all.. advice if possible.. i've got a small area to render outside. listed building. got to lime render.. any advice on scratch coat top coat ratios and timings between coats.. or any do's and dont's. any advice is appreciated. thanks in advance.. ;

 

[plasterer]

www.oldhouse.co.uk

 

[church]

Also a good tip is never lime render after september and before April

 

[christ]

i dont think that'll be a problem church

 

[church]

Ok here goes..... DEPENDING on what you are rendering over brick/ lathes and where abouts on the building the rendering is ...... it can be done in 2-3 coat work the mix stays the same 2 h/lime to 1 sand.
1st coat 2 hydrulic lime either 5.0 or 3.5 to 1 sharp washed sand add 3-4 bundles of hair per 2 barrow load mixer or 2 bundles if you are using a small mixer , mix for around 20 mins adding water slowly when you think its ready switch off the mixer and let stand for 5-10 mins then remix and use . Damp the substrate do not soak apply render to 10mm thickness and scratch in a daimond patten and protect from weather damp hessian is good for this leave for around 5/7 days depending on the weather.

2nd coat pretty much the same as coat one but use weaker lime 3.5 if you have used 5.0 on the 1 st coat and you can add soft washed sand to the sharp 50/50 also if you need to you can rule off and fill in the 2nd coat, only give the 1st coat a light spray/ mist of water before appling the second coat again leave for up to a week.

3rd coat (top coat ) use hydrulic 2.0 again 2-1 but this time use soft wash sand ( no hair ) do not rule off just use a wood grain float to finish again protect from weather for 2 days, after 24 hrs cheack render for hair line cracks remove with a light spray of water and float after 48 hrs do not work on render anymore. Hope this helps

 

[claw75]

Ok here goes..... DEPENDING on what you are rendering over brick/ lathes and where abouts on the building the rendering is ...... it can be done in 2-3 coat work the mix stays the same 2 h/lime to 1 sand.
1st coat 2 hydrulic lime either 5.0 or 3.5  to 1 sharp washed sand add 3-4 bundles of hair per 2 barrow load mixer or 2 bundles if you are using a small mixer , mix for around 20 mins adding water slowly when you think its ready switch off the mixer and let stand for 5-10 mins then remix and use . Damp the substrate do not soak apply render to 10mm thickness and scratch in a daimond patten and protect from weather damp hessian is good for this leave for around 5/7 days depending on the weather.

2nd coat pretty much the same as coat one but use weaker lime 3.5 if you have used 5.0 on the 1 st coat and you can add soft washed sand to the sharp 50/50 also if you need to you can rule off and fill in the 2nd coat, only give the 1st coat a light spray/ mist  of water before appling the second coat again leave for up to a week.

3rd coat (top coat ) use hydrulic 2.0 again 2-1 but this time use soft wash sand ( no hair ) do not rule off just use a wood grain float to finish again protect from weather for 2 days, after 24 hrs cheack render for hair line cracks remove with a light spray of water and float  after 48 hrs do not work on render anymore. Hope this helps

... church your a legend. its on new lath. thanks for the reply.. (thanks for all other replies too) ;D ;D