Most people overlook this very crucial stage when contemplating plastering for the first time, after all, the reason you no doubt want to plaster is to cover over an ugly, uneven or unstable surface. Plastering Tip #4: Cleanliness is the key to a perfect finish. jason_s_2 Forumite. 2019.08.28 - 2019.08.30 NEPCON Asia. Happy Learning Checklist Plastering. You should be aiming for the consistency of melting ice cream and the plaster should sit on the bucket trowel without sliding off when held level when its ready. This is perhaps one of the most common mistakes made by novice plasterers and is made all the worse by the fact that most untrained plasterers don't realise that a perfect finish in plastering comes not from applying it carefully but by working all six stages of plastering (from application of both coats to dry and wet trowlling right through to final polishing) quickly and at the right timing. HTH Cheers . 1. As a primer for your wall surface 2. > PVA, let it go tacky or even dry then just before plastering do it again. After completion of plastering work, the wall should be cured by any one practice. Our PVAs come in large 5 litre bottles and conform to internal plastering standards. Never use plaster that is going off - unless you want forearms like Popeye the Sailor. Moderator: Moderators. Average thickness is 12mm. If the paster is drying too quickly then you need to apply at least another coat of PVA. Giving your house a makeover is always important for creating your ideal home. Plastering is basically all about the 6 stages you must go through from the first coat, to the skim coat and then the 2 respective phases of what we call wet trowelling and dry trowelling - these are relatively simple to do but almost impossible to describe which is why we produced a "Show-You- How" to plaster video - think of it a bit like learning a martial art, you can't learn it through reading alone, you really need somebody to actually show you how it's done. Of course the later stages don't have to be done in this time and have timings of their own, but 30 minutes is a good rule of thumb for banging on the first covering. If you decided to just start plastering onto a wall without using PVA, the plaster will set at a very fast rate giving you little time to get a decent finish, so it’s worth applying to buy you a little more time to get the results you desire. familiarise yourself with the latest version. Always remember anyone can post on the MSE forums, so it can be very different from our opinion. Dilute 1 part PVA with 4 parts water and mix well. Have fun and don't forget to try check out our complete plastering how to guide. PVA stands for Polyvinyl Acetate, but you’ll probably know it as ‘glue’. The good news is that unlike learning a martial art you can learn plastering very quickly and get perfectly flat and smooth results from your very first try. However, the next job is getting some colour on the walls; painting new plaster is something that seems … The general mix for PVA is 3 parts water to 1 part PVA (3:1). Using this technique not only makes plastering quicker and less painless but conversely results in a perfect finish ever time compared to trying to get too good a finish on your first go. I have tried this and found it reactivated so much with the wet plaster than I was simply pushing a blob of plaster all over the wall … even if the plaster is good,you still need pva,the purpose of pva,is not only for the plaster to stick better to the wall,but also to stop the surface its going on sucking the water out the plaster to quick,stops its cracking and give you more time to work with the plaster. . The question (soory it wasn't clear) was about after plastering has been done. Thanks Plaster and water mix in volume on roughly a 50:50 basis so half a bucket of water will make a full bucket of plaster. 11 September 2007 at 8:15PM. Plastering Walls in a Renovation . For best results, the plaster should be applied while the PVA coat is tacky but not completely dry. Always use clean fresh water to mix plaster as any contamination can cause the plaster to go off before you've applied it. So, I must have got my ratio of water to pva wrong. Why is it that lot's of plasterers says use PVA when some people say it's a big no no. Create New Account. Log In. So it is probably OK under a tile adhesive if the wall is a bit loose-surfaced, I don't know (no tiler) but under paint, it tends to soften and prevents the paint adhering to the wall properly. Apply using a brush, working material … The correct mix for pva for plastering is 1 part pva to 5 parts water, and really only used to stop the plaster drying too quickly, plastering over silk paint with or without pva can only be as adhering as the paint before, pva doesnt make the plaster stick to the behind of a painted surface! On a test lung on loan from Hudson Valley Community College we essentially want to apply coats... Allow ceramic tiles to stick to timber ( bath panels etc ) Guys thank you so much for your surface... Water should be sealed with a PVA adhesive and not mist coats know it ‘! 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