Filling corners - the professional tips

While grouting joints on drywall is relatively easy, corners are often a problem. How to fill inside and outside corners professionally, you can read in this post in a precise step by step instructions.

Fill the joints beforehand

Corners and edges are the fine work of drywall. It is your turn only at the end after the joints on the plasterboard surface have been filled.

  • Also read - The price of filling a ceiling
  • Also read - filling or plastering the ceiling or both
  • Also read - A few small but effective tips will help when painting ceilings

The same leveling compound can be used for filling the joints as for the other joints.

Acrylic compound can only be used for the joint between drywall and solid masonry. It is a permanently elastic filler that prevents cracking when the components start to move. Silicone should not be used for this, as silicone cannot be plastered over or painted over.

Filling corners - step by step

  • Filler (€ 4.25 at Amazon *)
  • Corner protection strips
  • Special adhesive strip (Trennfix), alternatively also other adhesive strips
  • spatula
  • cutter
  • Spirit level
  • Stapler

1. Prepare corners

Thoroughly inspect the inside and outside corners and the wall connection corners. Clean the joints. Glue Trenn-Fix to the full height of the fixed wall at the inner corners that form a wall connection. This prevents the grout (€ 6.99 at Amazon *) from coming into contact with the plaster.

2. Prepare outside corners

Align the corner protection strips exactly vertically and fasten with the stapler. The brackets should alternate between sitting on one side of the wall. At the top and bottom, the edge protection strip should be approx. 2 - 3 mm apart.

3. Filling

During the first filling pass, first fill the joints in the inside corners, then pull off the corner protection strip to zero. Then apply a fine spatula. At the end of the second filling pass, the protruding part of the adhesive strip can be cut off cleanly with a cutter.

Tips & Tricks What you should never fill or close with drywall is the joint between the plasterboard and the screed at the lower end of the panels. It will later be covered by the floor covering and skirting board. If you close it, there are problems with the sound transmission.