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Plastering & Rendering

Why are the same cracks appearing despite a full removal of old plaster before re-plastering?

Anonymous user 03/03/2024 - 2.58 PM

Our house is 60yrs old. On moving in there was a crack at waist height from wall to wall in one of the bedrooms. The surveyor's report said that the wall ties may be damaged. We got builders and plasterers in to take remove the concrete in the hall to check the wall ties which were fine. All old plaster was removed from the bedroom right back to the brick which was then concreted over and then re-plastered. After 6 weeks, we sealed the plaster and painted the room in emulsion. 8 weeks later, the same cracks are appearing. There is an RSJ beam directly below the wall which is cracking.

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5 Answers

Anonymous user

Hi, There is a chance that the building is moving due to wall ties. If that is the case then the current wall ties needs isolating and new wall ties put in. Other than that, I recommend the wall with the crack needs taking back to the brick and meshed (E.M.L) prior to a sand and cement roughing coat and then skimmed. Sincerely, Michael Comley
Answered21 August 2013
3

A.J Plastering and Tiling

Rating: 5 out of 5
Peebles
Hi there, The crack should have had a stainless steel mesh fixed over the length of the crack before any rendering was done, also sounds like the rsj could be a problem if it is sagging. Cheers AJ
Answered22 March 2013
1

Anonymous user

other good option is to plaster board the wall not with screws but with dry wall adhesive. that shold allow some movements behind the board. that obviously does not solve the problem structurally speaking but should get hid of the cracks for good. regards
Answered8 December 2014
1

J Horton Plastering

Rating: 5 out of 5
Southampton
I definitely would go with dry lining the wall with plasterboard then a 2 coat skim
Answered18 January 2017
0

Anonymous user

In my opinion maybe the house is in a position where is exposed to structural vibration, because of a flux of heavy traffic from lorries. The solution to fix the crack in to the wall is to put a glass fiber mesh for plastering on the e tire surface of the wall. Best regards Chris
Answered6 January 2019
0