Properly Prime Plasterboard Before Painting – DIY Instructions

Properly Prime Plasterboard Before Painting – DIY Instructions

Plasterboard is one of the most important materials in dry construction today and is mainly used in the area of ​​room division and new construction of living spaces. Before you can paint plasterboard or cover it with wallpaper, you should pay attention to the primer and treat the surface accordingly. Here the reader learns helpful tips and measures on how dry construction serves as an optimal substrate for wallpaper and paint and what preparation ensures precision in surface treatment.

Primer ensures that the paint adheres evenly and permanently to gypsum walls. It is imperative to apply a primer to the plasterboard before painting over it to prevent the paint or applied plaster from drying unevenly or even crumbling when moisture soaks into the plasterboard. There is not only one way to prime, so that the do-it-yourselfer can make the basis for further wall processing dependent on his personal options and the subsequent processing of the surface. Plasterboard is very absorbent and is one of the materials that is particularly sensitive to external influences. This affects the finish of the surface and, if not primed, can contribute to the paint becoming blotchy, becomes friable or uneven and does not hold optimally. Prime yes, but how? Here the do-it-yourselfer learns important information about priming and the necessary preparatory tasks for walls in dry construction.

Advantages of preparing by priming:

  • The surface is limited in its absorption and absorbs the paint, plaster or wallpaper paste evenly.
  • The paint does not dry too quickly, which means that the result when painting is more intense and spotless.
  • You need far less material and save yourself unnecessary additional costs through the preparation.
  • The joints between the wall panels made of Rigips are evened out in terms of absorption and are no longer visible after painting. This means that there are no visible transitions between the plasterboard panels and therefore no color differences on the wall.
  • If a wall consists of plasterboard and masonry, the different material properties are compensated for by priming and the finished result does not provide any information about where concrete, brick or plasterboard is underneath the wall paint.

Three variants for one primer

Various ways lead to the goal in dry construction and give the opportunity to choose between different measures when priming. The primer can be applied with a special primer or diluted wall paint. The use of deep primer best balances the sensitivity to external influences and is one of the measures in dry construction that is used most frequently due to its simplicity and effective effect.

Since there are different deep bases, when making your selection you should focus specifically on the later wall treatment and choose a version that harmonizes with the wall color or the wallpaper paste and supports its adhesion. The primer with diluted wall paint is particularly recommended if the wall is then painted and not wallpapered. The costs are lower than with Tiefengrund and you need less working time for the application. This method works very well with plasterboard, as the thinning means that there is sufficient moisture in the wall paint and the plasterboard cannot completely absorb the primer. Alternatively, you can also refer to the advantages of drywall paint and use it for the primer.

What you need:

  • deep ground
  • or diluted wall paint
  • or drywall paint
  • a paint roller
  • a bucket
  • a utensil or wooden stick for stirring
  • a colander from the painting supplies

Wall paint for priming is the cheapest and most time-saving option. However, the result is only suitable for pure plasterboard and not for compensating for material differences. The deep ground is relatively expensive and requires an extra step to be included in the wall finish. Accordingly, you pay more money for priming and you have to reckon with more time until the wall is finished. Drywall paint, which is specially designed for preparing plasterboard for subsequent processing, is ideal. Primer and paint are applied in one step and you save time, but you have to accept a higher financial outlay.

Which foundation to choose?

The decision to use a particular primer depends on the planned wall treatment and the available budget.

Those who primarily want to save time are well-advised to use variant three, the drywall paint. Even if paint and primer are done in one step, you still have to spend more money on processing plasterboard.

Pre-coating with paint, which is well diluted with 10-20% water and applied before the actual tapping, is more time-consuming but cheaper. This method is only suitable if the wall is made entirely of plasterboard and has small joints. If widened joints or different materials on the wall are to be designed evenly, treatment with diluted wall paint is unsuitable.

A plasterboard wall should not always just be painted. If the application of plaster is planned or if the wall is to be wallpapered, Tiefengrund is the best way to prepare the Rigips surface. Deep primer reduces absorbency the most, allowing plaster or wallpaper paste to stick to the surface. Especially with heavy wallpapers and textured wallpapers you should not do without deep primer and refrain from priming with diluted paint or special plasterboard paint.

Ultimately, it can save money and time if you read the back of the offer and get an overview of which preparation is optimal based on further processing. Pure Rigips without a primer cannot be painted, plastered or covered with wallpaper without any problems. The properties of gypsum plasterboard are responsible for the fact that you should always work with a primer in drywall construction to prevent moisture from getting into the gypsum.

You can always check our website for more content: blog

Rigips in damp rooms

The sensitive material plasterboard should not necessarily be used for damp rooms. If a bathroom or kitchen is divided and designed with plasterboard, you have to pay more attention to priming than, for example, to dividing the living room or bedroom. The sole treatment with wall paint is not enough to compensate for the high humidity in the room and to protect the drywall from damage caused by moisture. In damp rooms, deep primer and a subsequent waterproof surface treatment is the only measure that is recommended for Rigips and that is suitable for the desired result in the surface design and adhesion of wallpaper and plaster.

Don’t underestimate the time required

For reasons of cost and time, it is not advisable to do without a primer. Rigips is a practical material that shortens the construction time, but it has a very sensitive property and should therefore only be used indoors. Priming extends the life of a gypsum wall and prevents the drywall from being damaged by contact with moisture and having to be replaced after a few years.

Gypsum boards are usually covered with a wafer-thin layer of paper, which is not a substitute for wallpaper and cannot be considered a primer. If the wall is to be plastered later, choose plasterboard without the paper layer, which would come loose when applying primer and would result in an uneven surface.

Those who dedicate themselves to the preparation with patience and the necessary time will have a lot of fun with their drywall and will not design their house or apartment with a new room layout without removing concrete or brick walls. Plasterboard is also a popular and practical building material for hanging ceilings or as wall compensation. After priming and the necessary drying time, you can design the wall as desired and rely on optimal adhesion and rich colors on the surface. If you save this time, you save at the wrong end and you can count on the fact that the construction site will have to reopen after a short time and ultimately have to start all over again with the wall processing.

With Rigips you can design rooms freely, hang ceilings, clad walls or set accents. Gypsum is a very moisture-absorbing material, which must be protected from external influences and contact with excessive humidity. In dry construction, this is done using a primer, which provides the necessary roughness of the surface, reduces absorbency and makes it easier to apply paint or wallpaper. Gypsum board can be primed in three different ways. It is therefore advisable to compare the different substrates that are suitable for paint, plaster or wallpaper and that simplify post-processing and support the positive properties of plaster walls.