Simon
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| posted on 25/11/12 at 05:32 PM |
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Repointing q
Folks,
About to do some repointing on dry internal garage wall prior to plasterboarding and just need a bit of advice re mortar.
Should it be dryish, wetting or middlish and should I wet the brickwork or not.
Cheers very much
ATB
Simon
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zilspeed
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| posted on 25/11/12 at 06:27 PM |
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The important thing about the water content is to be sufficient to hydrate the cement.
You also want it to be workable so a bit of plasticiser wouldn't hurt things to make it a bit easier.
It wants to be stiff enought that if you trowel it into a shape, it will pretty much stay there. this should help you get your water quantity
right.
Really, just like a rudimentaru slump test as applied to concrete.
Hydration is the mechanism that actually causes cement to become the finished article. It's not at all about drying out, so a semi dry mix
really isn't much use.
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austin man
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| posted on 25/11/12 at 06:52 PM |
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few drops of wshing up liquid wont go amiss
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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Simon
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| posted on 25/11/12 at 07:14 PM |
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quote:
Originally posted by austin man
few drops of wshing up liquid wont go amiss
Excellent, a concrete Aero
ATB
Simon
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Peteff
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| posted on 25/11/12 at 08:01 PM |
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If it's dry and internal and you are covering it with plasterboard why bother pointing it ? If you are sticking the boards up with drywall
adhesive you don't need them too smooth anyway.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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cliftyhanger
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| posted on 26/11/12 at 10:23 AM |
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I really would dot and dab onto a garage wall. That stuff pulls all the moisture out of waht it is on and leaves lovely damp patches everywhere. Had
this on a victorian house (solid walls, which appeared dry). Had to take it down and batten and board with a vapour barrier, MUCH better solution.
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Simon
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| posted on 26/11/12 at 11:39 AM |
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quote:
Originally posted by Peteff
If it's dry and internal and you are covering it with plasterboard why bother pointing it ? If you are sticking the boards up with drywall
adhesive you don't need them too smooth anyway.
The outside wall has had the extension built on top of it, and you can see daylight through some if the old single skin
ATB
Simon
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