Tiny cracks in new plaster

Question

Why are there lots of tiny hairline cracks in my new plaster?

Kevin · Answer

it can be a number of things , it could be movement upstairs, unseasoned timber twisting, wet timber drying out and shrinking, plaster drying out to fast

Arjan · Answer

Use filling up end sand it of should be okey  if you have few cracks but if is every wher crack then you need plastering scheming up ?

Karl · Answer

Hi Adam,
Without inspection, its difficult to give a comprehensive answer, but here is some information that may be of use to you.

If these cracks are on a timber and plasterboard substrate, and the cracks are linear or at right angles it is likely that the scrim tape was omitted, or not enough screws fixed into the boards, or excessive movement in the floor joists or stud partitions, or a combination of these.

If the cracks are present on masonry walls and are linear or at right angles, or appear to be stepped (like a staircase), then the problem is likely movement within the wall(s) or foundations.

If the cracks mostly resemble crazing, this is likely caused by poor preparation of the surface, such as failing to adequately remove dirt/grime and/or controlling suction (and consequently- shrinkage) prior to applying the finish coat. If it is a skim over - failure to remove flaky paint or bits of wallpaper can give rise to similar issues.

The selection and/or quality or the building materials can present problems.

Hope this helps,
Kind regards

Mark · Answer

May not have enough preperation  or drying out to fast  movement of timber

Darren · Answer

You have had the heating on to soon if on ceiling it could be movement are they not used Skyrim tape

Anthony · Answer

Normally  it's because  there may be stress fractures   in  backing which will come through.  If not  covered  originally.

Dennis · Answer

Could be to do with bad prep work no uni bond on wall before plaster was applied 
Could be a cold spot behind the wall

Lori · Answer

Was it over old morta walls? Substrate walls need to be rectified today before plastering old walls. If hollow or air line cracks can make plaster crack.

Joseph · Answer

Movement in the board behind I would recommend get ur cieling striped screwed  up properly scrimed an repalstered

Jagvinder · Answer

Wall behind absorbing moisture from new plaster should have scratched the wall and extra PVA on wall and plastering 2nd coat on it helps,
plastering Skimming and Building Service's

Keith · Answer

Possibly not been prepped not good enough. Could be a number of reasons. Get him back to inspect it.

Neil · Answer

It could be down to not put fibre tape over original cracks before being plastered of force drying or movement above it can be a number of things

Tiny cracks in new plaster

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