Vertical hairline crack down wall

Question

I have a hairline vertical crack going down internal wall between my house and next door in a terraced .I used filler to the repair the  crack a few months ago then  painted  to try and repair but the crack has reappeared what can cause is it a concern

Steven · Answer

Just movement between properties, usually nothing to worry about, use a coloured silicone as an expansion joint not filler which will crack.

Jason · Answer

Hi Stephen,
Not usually a problem slight movement between two properties .
I would rake out the filler back to solid material and fill with a suitable joint mastic /silicone 
They do coloured so can usually match in ok.

Darren · Answer

A filler will almost certainly crack out....to have any real chance with it,I'd say tape and plaster it over which would give it a chance.....the crack itself is just movement,nothing to panic over....all in my opinion obviously but we see lots of cracks without demolition as an outcome

Allan · Answer

Rack out the crack with a scraper then dust down the crack. Apply Toupret Fill-Flex into the crack then wait 24 hours before filling the crack again with normal interior filler.

Vertical hairline crack down wall

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