Hairline cracks in new plaster

[DanJohnston]

Hi Folks

I'm in the process of renovating a house and this has involved skimming various walls and ceilings. I've started to notice that a number of hairline cracks are appearing in the new plaster, these are predominantly over doorways under windows and are jagged lines. Is the only solution to continually fill and touch up the paintwork or is there a more long term solution? Should I also be looking for a news plasterer

 

[joe-90]

If the house has been empty and now has heating on it may just be shrinkage from the house drying.


joe

 

[Zampa]

By the sounds of it they are stress cracks...have you had a lot of work done structurally?.. do the cracks run from the edges of the cill diagonally outwards?...and the same above the wondow?...from the corners of the head of the window outwards?

 

[DanJohnston]

Thanks for the replies, we've done some structural work but not a huge amount. Yes the cracks run diagnollay outwards from the top corner of the door frame or the bottom corner of the window cil

 

[confidentincompetent]

Thanks for the replies, we've done some structural work but not a huge amount. Yes the cracks run diagnollay outwards from the top corner of the door frame or the bottom corner of the window cil

Think what you have is common in most houses, I find most houses with a block inner leaf get these cracks round windows and doors.
Tell your missus not to slam the doors

 

[Zampa]

Thanks for the replies, we've done some structural work but not a huge amount. Yes the cracks run diagnollay outwards from the top corner of the door frame or the bottom corner of the window cil

Definatly stress cracks then....rake them out a little then fill with ordinary polyfilla...NOT the ready mixed stuff..which sets like concrete!...if they keep coming back you may have to consider lining the wall...if they are really bad then use a lined backed lining followed by 800 grade.

 

[DanJohnston]

I can now sleep easy, many thanks

 

[gimchee]

I find that sanding these hairline cracks works quite well and then just brush over and roll over for the finish