How To Plaster A Hairline Crack

Plastering a Ceiling

How to Plaster a Ceiling.
How to Plaster a Ceiling.

How To Plaster A Hairline Crack

How To Plaster A Hairline Crack

Our aim is to help you learn how to plaster, but no matter how good your plastering is done, hairline cracks are something that not many walls or ceilings can usually escape. Be it fresh plaster or an old wall, small and disjointed cracks usually crop up at some time or other. Hairline cracks might appear innocent and not harmful but if ignored they can lead to great damage and many other problems. For instance, the crack could further widen and gape and at times become very difficult and expensive to repair.

It could give rise to other issues like problems of wall damping or even damage the underneath piping or electric casing at times. Even though these are all possibilities, it is best that even hairline cracks be attended to swiftly and properly.

Fixing Hairline Cracks

If you want to fix hairline cracks in your walls there are basically two ways you can do this. The first way is quite simple. Just call or hire a professional. Any plastering professional can do this for you very easily. Now the second way and more economical way would be to save some money and easily fix those hairline cracks by yourself by following my simple “do it yourself” techniques. Here is some basic information you might find resourceful in your DIY pursuit-

What Materials Do I Need?

You will need minimal basic materials like

Filling Materials (Materials used to fill the cracks)

A simple tool (An old knife will do)

A Scraping tool (Anything that can scrape out loose plaster from the crack)

Some fresh paint

Basic Steps

1. Clean the hairline crack with a scraping tool to take out any loose particles of plaster and dust off with a cloth.

2. “Fill” the crack with a “filling solution” (You can get numerous varieties in your local building merchants store). You could use carlite bonding or a simply use scrim tape. Ensure that the filing material adequately traverses in to the insides of the crack. For this particular reason, a good filling tool comes in handy, depending on the size you could use an old trowel.

3. Once you have put in the filling material you will need to flatten out the crack so as it adheres to the wall flatness and surface. Allow the crack to dry out (also refer instructions that come along with the filling material)

4. Check the dried out cracks after a day and look for any indenting. If necessary, apply a second coat and let it dry out too.

5. Once dried, you need to “seal” the crack so that it does not open up again. For this you can use resin materials or even drywall tapes (paper types will come cheaper than the fibreglass varieties)

6. If the cracks are too minute you can also simply fix them using “sticky” solutions that only need to be applied using a pre-fit nozzle.

7. Once your crack is sealed you can cover it up some fresh paint to match your wall or cover it behind other wall objects.


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