Another one for the DIY-isti
in [UK Motorcycles]
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From: Krusty on 7 Apr 2010 07:59 Grimly Curmudgeon wrote: > We were somewhere around Barstow, on the edge of the desert, when the > drugs began to take hold. I remember "Krusty" > <dontwantany(a)nowhere.invalid> saying something like: > > > No, no, no, no, no! Never use PVA on plaster, diluted or otherwise. > > All it does is trap moisture which can then bubble, & make the wall > > slippy so it's harder to paint. > > > > Either use watered down emulsion, > > I agree with not using too strong a dilution of PVA, as it leaves a > sealing effect on the wall - but it's perfectly fine if diluted to at > least 5:1, and for this first coat/primer application, say 10:1. Also > recall that emulsion is mostly dilute PVA anyway. Each to their own. I've seen numerous stories on DIY boards about paint peeling weeks/months after people used PVA. Watered down emulsion always works, is recommended by the paint manufacturers, is cheaper than PVA (if you use the cheapo shed stuff) & gives a start to the colour you're using. There's not one single reason to use PVA instead, unless you really, *really* like painting & want to increase your chances of having to do it all over again in the near future. -- Krusty
From: Mike Buckley on 7 Apr 2010 10:14 In message <hphs3u$110$1(a)news.eternal-september.org>, Krusty <dontwantany(a)nowhere.invalid> writes >Grimly Curmudgeon wrote: > >> We were somewhere around Barstow, on the edge of the desert, when the >> drugs began to take hold. I remember "Krusty" >> <dontwantany(a)nowhere.invalid> saying something like: >> >> > No, no, no, no, no! Never use PVA on plaster, diluted or otherwise. >> > All it does is trap moisture which can then bubble, & make the wall >> > slippy so it's harder to paint. >> > >> > Either use watered down emulsion, >> >> I agree with not using too strong a dilution of PVA, as it leaves a >> sealing effect on the wall - but it's perfectly fine if diluted to at >> least 5:1, and for this first coat/primer application, say 10:1. Also >> recall that emulsion is mostly dilute PVA anyway. > >Each to their own. I've seen numerous stories on DIY boards about paint >peeling weeks/months after people used PVA. Watered down emulsion >always works, is recommended by the paint manufacturers, is cheaper >than PVA (if you use the cheapo shed stuff) & gives a start to the >colour you're using. There's not one single reason to use PVA instead, >unless you really, *really* like painting & want to increase your >chances of having to do it all over again in the near future. > What about tiling onto fresh plaster? Out bathroom fitter used dilute PVA on our old wall because the previous tiles hadn't stuck very well. -- Mike Buckley RD350LC2 CB72
From: Krusty on 7 Apr 2010 10:59 Mike Buckley wrote: > In message <hphs3u$110$1(a)news.eternal-september.org>, Krusty > <dontwantany(a)nowhere.invalid> writes > > > > Each to their own. I've seen numerous stories on DIY boards about > > paint peeling weeks/months after people used PVA. Watered down > > emulsion always works, is recommended by the paint manufacturers, > > is cheaper than PVA (if you use the cheapo shed stuff) & gives a > > start to the colour you're using. There's not one single reason to > > use PVA instead, unless you really, really like painting & want to > > increase your chances of having to do it all over again in the near > > future. > > > What about tiling onto fresh plaster? Out bathroom fitter used dilute > PVA on our old wall because the previous tiles hadn't stuck very well. Shouldn't need anything on fresh plaster. PVA's used to seal surfaces, so it's great for concrete floors to stop dust, or for slapping on walls /before/ plastering to stop the wall sucking the moisture out the plaster too quickly, & to block any nasty stains reacting with the plaster. Tile adhesive doesn't need to dry slowly, & new plaster won't have years of accumulated shite embedded in it, so no need to seal it for tiling. -- Krusty
From: Beav on 8 Apr 2010 10:43 "Krusty" <dontwantany(a)nowhere.invalid> wrote in message news:hphmg2$s0e$1(a)news.eternal-september.org... > Beav wrote: > >> >> "Timo Geusch" <tnewsSPAMMENOT(a)unixconsult.co.uk> wrote in message >> news:m98p87-lfv2.ln1(a)nermal.internal.unix-consult.com... >> > I assume that when you're decoration and painting over bare plaster, >> > you're supposed to use some primer to get the paint to stick to the >> > wall? >> >> There is and it's called "Size". Any reasonable DIY centre should >> have some. It's not much more than diluted PVA glue mind, so a >> cheaper less wasteful option would be a small bottle of PVA and a >> quantity of water. Paint on, leave 'til dry. Sorted. > > No, no, no, no, no! Never use PVA on plaster, diluted or otherwise. Well I'm not getting into a bun fight over this, but....... it's never had any bad effect on any of the walls I've painted, sized, papered, rendered, plastered or knocked down. >All > it does is trap moisture which can then bubble, & make the wall slippy > so it's harder to paint. Make sure (as you should anyway) that the walls are dry before putting ANYTHING o them. -- Beav VN 750 Zed 1000 OMF# 19
From: Beav on 8 Apr 2010 10:44
"Mike Buckley" <Mike(a)hotmail.com> wrote in message news:hKS8F0F6MJvLFw6J(a)hotmail.com... > In message <hphs3u$110$1(a)news.eternal-september.org>, Krusty > <dontwantany(a)nowhere.invalid> writes >>Grimly Curmudgeon wrote: >> >>> We were somewhere around Barstow, on the edge of the desert, when the >>> drugs began to take hold. I remember "Krusty" >>> <dontwantany(a)nowhere.invalid> saying something like: >>> >>> > No, no, no, no, no! Never use PVA on plaster, diluted or otherwise. >>> > All it does is trap moisture which can then bubble, & make the wall >>> > slippy so it's harder to paint. >>> > >>> > Either use watered down emulsion, >>> >>> I agree with not using too strong a dilution of PVA, as it leaves a >>> sealing effect on the wall - but it's perfectly fine if diluted to at >>> least 5:1, and for this first coat/primer application, say 10:1. Also >>> recall that emulsion is mostly dilute PVA anyway. >> >>Each to their own. I've seen numerous stories on DIY boards about paint >>peeling weeks/months after people used PVA. Watered down emulsion >>always works, is recommended by the paint manufacturers, is cheaper >>than PVA (if you use the cheapo shed stuff) & gives a start to the >>colour you're using. There's not one single reason to use PVA instead, >>unless you really, *really* like painting & want to increase your >>chances of having to do it all over again in the near future. >> > What about tiling onto fresh plaster? Out bathroom fitter used dilute PVA > on our old wall because the previous tiles hadn't stuck very well. And isn't that what this thread started with, sticking mirrors (same as tiles) to plastered walls? -- Beav VN 750 Zed 1000 OMF# 19 |