![]() Base coat plaster, as the name suggests, provides a base or under coat for skim or top coat plaster which forms the outer visible finished coat.īase coat plaster is also made using different powder, it uses bonding or browning plaster powder as opposed to skim coat which uses multi-finish or board finish powder.īonding plaster used to make base coat plaster How Thick is Base Coat Plaster?īase coat plaster should be somewhere between 12mm and 15mm in thickness. No, base coat plaster and skim coat plaster are not the same. If you are needing to cover a plasterboard wall then your don’t need to worry about a base coat, you can skip straight to the skim coat, unless the surface is extremely out of level that is.įor full information on skim coat plaster including how to mix it, lay it on and finish it, see our skim coat plastering project here.īase coat plaster laid on to wall Is Base Coat Plaster the Same as Skim Coat Plaster? Laying on base coat plaster is only done when you are plastering from scratch e.g. The base coat is extremely important as, with all jobs, the overall finished job will only ever be as good as the preparation that was done initially. The skim coat needs to be totally flat as this provides a base for wallpaper or paint and will become the visible finish in a room.Īpplying a base coat over any bare masonry surfaces will cover any imperfections and also fill over depressions and high spots to leave a nice flat base for your finishing top coat. The main goal of base coat plastering is to provide a flat and level base for the skim coat or top coat. ![]() If you have never done any plastering before it’s firstly important to establish that it’s done in 2 parts, the first being a 12 – 15mm thick base coat and the second being a 3 – 5mm thick skim or finishing coat to give a total finished thickness of around 15 – 18mm. ![]() The technique is important of course, and this is what we cover here, but this is one of those jobs where plenty of practice is essential. In this guide we run through the basics of laying on a base coat, however getting the wall level, flat and smooth is done by “feel”, rather than technique. Base coat plastering is the process of laying on a coat of bonding or browning plaster to form a solid and level base to lay on a finishing coat or plaster, or skim coat as it’s also known.
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