Is there any reason why cracks in a traditional (early 1900's) ceiling
can't be treated, at least cosmetically for the medium term, by using
the tape which joins together modern plasterboard sheets, skimmed over
and then painted with something reasonably gunky?
Skimming over existing paint can be hit and miss. Usual technique is to
apply PVA and skim whilst still slightly tacky. It is unreliable and can
fall or flake off.
The way I have seen with your issue is to widen the crack and apply
caulk, and then repaint. Caulking will be more flexible than a thin
layer of (skimmed) plaster.
Wouldn't it help to apply some plasterboard tape over the widened crack?
I suppose the issue is: what does one fill the crack above such tape
Maybe a modern flexible adhesive at ?5 a tube, rather than caulk at ?1?
And if it moves then, IMLE with late 19th lath and plaster ceilings here
and in neighbours' houses, opening up the cracks on is one for the bold
and courageous. OTOH papering a ceiling is a _lot_ easier than it used
to be using Wallrock Fibreliner or the like which is very forgiving of
being pulled, pushed, wrapped around a head, left soaking while you have
reply-to address is (intended to be) valid
On Sunday, 23 September 2018 15:22:33 UTC+1, Dave Plowman (News) wrote:
Flexible fillers have nowhere near the necessary amount of flexibility to prevent recracking. Either the ceiling's going to move more or it's not: if it does, it will crack regardless of what you do.
12:07:43 on Sun, 23 Sep 2018, firstname.lastname@example.org remarked:
Do you mean it would crack somewhere else, or that the joint constructed
of flexible filler would open up?
My idea was to use non-flexible filler but to bind the edges together
with fibreglass reinforcing tape. The plaster would first have to be
slightly ground away to make the final result flush, of course.
Currently the cracks aren't actually opened up, but the filler from a
previous decoration attempt (could be 10+ yrs ago, but I don't know) is
proud of the surface and looks bad.
On Monday, 24 September 2018 10:04:29 UTC+1, Roland Perry wrote:
1. as I explained if the ceiling wants to crack it will. Plasterboard is not strong enough in tension to resist the wishes of moving woodwork or masonry.
2. it's a waste of time
3. it makes a mess of the finish, which then needs correcting
if you can do that, great. A lot of people seem to decide they can't. Bear in mind that paper is not sandable to any practical extent, so it can only work if the ceiling is already skimmed, which they usually are.
On Mon, 24 Sep 2018 02:26:18 -0700 (PDT), email@example.com wrote:
If the house dates from the 1900's then the ceiling, unless it has
been replaced in the recent past, is not going to be plasterboard
(invented about 1916 and not common until the 50's) but lath and
On Monday, 24 September 2018 17:24:22 UTC+1, Peter Parry wrote:
Lime in brickwork accomodates movement by microcracking then healing by growing crystals across the gaps. I don't know whether L&P ceilings do likewise. Either way by the time it has visibly cracked it's immaterial.
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