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Plastering & Rendering

Ceiling crack - caulk and polyfilla

Anonymous user 28/02/2024 - 3.50 PM

There are a couple of cracks in my ceiling in which I applied flexible caulk but reading up on this subject now, it seems like the polyfilla is more suitable for such an application. Do i scrape the caulk out now before applying polyfilla or can i apply the polyfilla on top of the crack with the caulk already in it?

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5 Answers

Lwm plastering ltd

Rating: 5 out of 5
Croydon
I would personally rake out the caulk and cut the crack out half an inch either side of the crack and then fill using our prefered (easy filler) which is better when sanding down as opposed to pollyfiller ,unfortunately cracks come through movement and you will have a much better chance of it not cracking again if you cut it out properly, hope this helps
Answered9 June 2020
10

Anonymous user

I would highly recommend to clear caulk and that whole then you may apply polyfiller. Leave it for couple of hours and apply sand paper smoothly then you go ahead with painting. I hope it will help you.
Answered9 June 2020
1

Anonymous user

I would rake out the crack and fill with a joint filler let dry then I would apply Paper tape with joint filler then finish of with 2 coats of joint cement then sand and paint. Job done !
Answered11 June 2020
0

Dean Topley

Rating: 5 out of 5
Norwich
I would cut the crack out using a Stanley knife to form a V shape in the crack then depending on how deep and the width of the crack fill with easy fill. If crack is more than 1 or 2mm wide I would make a wider and deeper cut and apply a strand of hessian scrim dipped in casting plaster or some other plaster
Answered23 June 2020
0

L Williams Plastering

Rating: 5 out of 5
Leicester
If this is in a ceiling then unfortunately you’ll be wasting your time and money buying fillers or caulk. Ceilings take a good pounding due to people walking upstairs and doors being slammed. If it’s an upstairs ceiling some walls will be stud walls which connect to the ceilings and will provide vibrations from doors closing etc. I’ve been plastering for 14 years and I am now a tutor at a college.
Answered23 June 2020
0