Generally, 12 – 15mm should be enough to take out any imperfections in a surface and also level it, however some surfaces can require quite a bit more to level them.Ĭorner angle bead and stop angle bead fixed that can be used to level surface off How to Practice Base Coat PlasteringĪs we have said, plastering is a tricky job and even those that do it every day as a job need to practice and keep their skills up to ensure they still have the “feel” for it. The reason for this is that once a skim coat is applied at 3mm – 5mm, this gives a total thickness of somewhere around 18mm which is the desired overall thickness for both coats. 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. It does not store any personal data.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. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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