Gib Kirk Giordano. No Waterproofer

Cockney1 said:
I put a bit of waterproofer in both coats :inocente:
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This is the way to do it...always used a water vapour permeable waterproofer 4-1 both coats been back to alot of jobs I did 10 years ago...still perfect today. Use around half the dose in top coat.
 
FreeD said:
This is the way to do it...always used a water vapour permeable waterproofer 4-1 both coats been back to alot of jobs I did 10 years ago...still perfect today. Use around half the dose in top coat.
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What waterproofer do you use? Some on here are saying not to put it in the top coat if using lime in the mix?
 
Cockney1 said:
What waterproofer do you use? Some on here are saying not to put it in the top coat if using lime in the mix?
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I used to use Cementone...think its made by Bostik now integral waterproofer. Waterproofer in both coats no hydrated lime. 4-1 both coats.
 
fixit said:
Wondered about the comments from Kirk. See the copied youtube comments below.
Would they use different sand/cement in Down Under.
FIXIT
we put waterproofer in the first coat but not the 2nd coat

Kirk Giordano plastering Inc
Good evening fix it, I'd stop doing that, if you waterproof the first coat you have sealed it, In order for the second coat to adhere it need to adhere by suction or what we call a mechanical bond, you need a porous first coat that you make moist with water to accept the second coat which is wet. If you waterproof the first coat, the second coat will not adhere forever unless you apply a bonding agent over the first coat as it's now sealed. Bringing peace, love, and harmony to plastering The complete plastering encyclopedia on video, by the plastering messengers of Youtube
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Technically Kirk is right. But u won't have a problem if u have waterproof in the scratch coat. I personally don't like waterproofer as it can make the finish not as strong.
 
U are wrong @essexandy do your research. Waterproof is a sealer. There is water in your mix. Better to only have it in your top coat. Even gypsum say not to skim on to render that has waterproof in it. And most ocr readers don't use waterproof In them. Just because u do it with waterproof don't make it right. Iv used it myself in scratch coat and had no problems. But it's not as good as plasticiser. And u should not use waterproof if u put lime in your mix.

Plus waterproof doesn't even make the render waterproof so it's pointless anyway.
 
theclemo said:
U are wrong @essexandy do your research. Waterproof is a sealer. There is water in your mix. Better to only have it in your top coat. Even gypsum say not to skim on to render that has waterproof in it. And most ocr readers don't use waterproof In them. Just because u do it with waterproof don't make it right. Iv used it myself in scratch coat and had no problems. But it's not as good as plasticiser. And u should not use waterproof if u put lime in your mix.

Plus waterproof doesn't even make the render waterproof so it's pointless anyway.
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How does it not make it waterproof if it stops the rain from penetrating the plaster
 
theclemo said:
Because it doesn't it only shows it down. If it rains long enough it will penetrate it.
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I thought waterproofer was some silicate something or other that swells and block ingress of water so it only slows it
 
Read the spec sheet on it. The info is all there. Plus we lost control of a gable b4 and had to take it off. It had waterproof in the mix. It was pissing the night b4 we did the hack off. Scratch was wet behind the top coat.
 
Cockney1 said:
What mix do you normally use on a s&c render job then mate??
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Il probably get loads of blah blah that’s wrong ! 4-1 scratch coat 4-1 topcoat free flow in both silver sand rules of beauty never had a comeback or fail since using this method and rubs up to perfection!
 
smoother09 said:
Il probably get loads of blah blah that’s wrong ! 4-1 scratch coat 4-1 topcoat free flow in both silver sand rules of beauty never had a comeback or fail since using this method and rubs up to perfection!
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Same ratio for both mixes???
 
smoother09 said:
Il probably get loads of blah blah that’s wrong ! 4-1 scratch coat 4-1 topcoat free flow in both silver sand rules of beauty never had a comeback or fail since using this method and rubs up to perfection!
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That’s a strong mix but everyone’s different, You’re methods you’re method mate!
 
Cockney1 said:
Everyone’s different, You’re methods you’re method mate!
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Don’t get me wrong through a lot of trial and error I’ve found my own way with s/c and do a awful lot of it! It’s totally against the way my old man taught me but works for me lol
 
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