Why Are Hairline Cracks Appearing In New Plaster Work? | Checkatrade
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Why are hairline cracks appearing in new plaster work?

Cracks in plaster are very common, but it’s understandable that you wouldn’t expect that to happen with a fresh layer of plaster – and more so if you’ve had plasterboard installed.

That said, there are a number of reasons why you might be seeing hairline cracks in new plaster:

  • Improper mixing of plaster – This could have created an inconsistent texture of the plaster mix, which could result in uneven shrinkage and, consequently, hairline cracks appear
  • Poor plastering technique – Potentially inexperienced plasterers may have applied the plaster unevenly, which can lead to cracking
  • Extremely quick drying – If your home experiences high temperatures then the plaster can dry too quickly, which leads to the outer layer of plaster hardening before the inner layers and this can cause hairline cracks
  • Structural movement – There could be movement of the building structure, although very often structural movement causes more noticable cracking (although it can start with hairline cracks)
  • Lack of priming – It’s typically good practice to apply a primer before plastering as it helps to create a better bond between the plaster and the surface, so cracks can appear if there isn’t proper priming in place
  • Moisture in plasterboards – If plasterboards were installed, they may not have been 100% dry before being installed (this often happens when they’ve been stored anywhere cold and damp). Once they dry out the boards will shrink and could cause cracks

Find the best local plasterers near you

If you need help with plastering work in your home, we always recommend hiring an experienced local plasterer to carry out the work – so that you can be confident that the plastering will be carried out to a professional standard.

Thankfully, we can help you find the best plasterers in your area

You can use our quick and easy online search to find tradespeople near you – view their profile for pics of their work and their latest customer reviews.

Or, if you want to save time, use our handy request a quote tool, and we’ll do the legwork for you. We’ll get approved local plastering experts to contact you directly.

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