How To Repair damaged plasterboard
If you damage a plasterboard wall, often the paper will be scuffed up.
This section will show you how to fix damaged plasterboard when the paper is scuffed up.
This picture shows a damaged plasterboard wall,
with the paper scuffed up on the edges.
To repair this, first you need to peel away any loose paper.
The loose edges will swell and raise up when wet.
This is how it should look before you start patching.
The 1st coat should be kept close to the size of the hole.
You can see how I start appling the mud is designed to keept the patch narrow.
One swipe is all thats needed to clean off all the excess,
without trying to over fill the patch.
This is all thats required for the 1st coat.
Even though we peeled back the loose paper, the wet plaster causes the edges to swell,
Using the handle of the joint knife press the raised paper back in below the surface.
you cant fill over the raised paper edges without making the patch stand out.
The 2nd coat is also applied thin the same way as the 1st coat.
This is to avoid over filling, yet fill the indented area.
Apply another coat with a 6 inch joint knife, as you can see we have built it up
with 3 very thin coats so far. Normally a patch will only require 3 coats in total.
The extra step is requried here to draw out the swelling on the scuffed paper.
To apply the top coat use an 8 inch joint knife. Apply a thick coat as show.
Feather out the edges on each side.
One or 2 times through, holing the joint knife flatter will finish it off.
- Over filling while trying to cover the swollen paper edges.
- Making the patch too small, leaving a bump.
- Or simply trying to do the job with one or two coats.