hairline fractures

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ballsdeep

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alright lads. i reskimmed a lath plaster ceiling in my house,before i did it i went gun ho taping up any movement cracks etc. painted up,few months past & i look up this morning & there's a few big long nasty hairline fractures. whats the best way to fill em in without em coming back again? when it's lath plaster in your own house would you guys just overboard & skim? cheers ballsdeep
 
ballsdeep said:
alright lads. i reskimmed a lath plaster ceiling in my house,before i did it i went gun ho taping up any movement cracks etc. painted up,few months past & i look up this morning & there's a few big long nasty hairline fractures. whats the best way to fill em in without em coming back again? when it's lath plaster in your own house would you guys just overboard & skim? cheers ballsdeep
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I HAD SUM NICE CORNICE IN MY BED ROOM AND DIDNT WANT TO OVERBOARD BECAUSE I WOULD LOOSE THE MEMBER OF THE CORNICE SO I GOT IN THE LOFT AND BACK PLASTERD THE LATHS WITH DRY WALL ADHESIVE THIS RE ATTACHED THE CEILING THEN I RESKIMED THE CEILING AND ITS BEEN SPOT ON FOR 2 YEARS.
PS IF THE OLD PLASTER IS VERY LOOSE IT WILL BE BEST TO PUT A SHEET OF PLYBOARD ON THE CEILING FIRST HELD IN PLACE BY PROPS, THIS WILL STOP THE WHOLE LOT COLAPSING WHEN YOU ARE BACK PLASTERING
 
the problem with skimming old lath ceilings is your putting a lot of moisture into the old dried out ceiling plus as you are troweling your are pushing the old laths up and down so there moving plus the extra weight on the old ceiling . If i am not allowed to overboard or take the old down and re-board then i walk away.
 
Like the mans says if you put more weight on an already poor ceiling wehat do you expect????
Cracking.
Over board ur rip down and re board it up to you.This is the way forward.
 
i think he means skim it with paper its a new plaster thats just come out give it one thick coat of paper finish then another it comes out brill allready decorated you can get stripes aswell as woodchip ;)
 
ive drylined ceilings like this and as its in your own house time wont matter so much. i mean scrim and use drylining compound on the cracks. it wont add any significant weight and as youve glued the whole thing back together shouldn be a problem from the vibration from the sanding etc. i think the compound is more forgiving than plaster as haven had one crack come back througth it.
 
there will be extra weight lets say a 12m ceiling will be 2 bags roughly say 40 to 50 kilos then the water say another 30 kilos.thats a added weight of a human man hanging from 100 year old lathes.....not a good idea!......reboard it & use longer screws..go over old ceiling ...dont rip down......skim an old lathe and plaster ceiling ..it wont last in many cases...if it has cracks before itll have cracks after......even with fibabind etc........ reboard everytime if u want to keep a decent reputation for yourself...some may disagree but i do a good 50% of my work lath plaster and found this is the only way to have no comebacks and to do the job to last and even earn a few bob extra in the process, on alot of artex patterened ceilings i do the same now...... :P
 
On some jobs by the time you've stripped the ceiling preped it taped it repaired it etc...
you could have overboarded the f u cker ;D
So i tell the customer it won't cost them anymore.... Oh apart from the extra boards that is ;D
 
Cracks are like shlt...................they happen!

Overboarding doesnt 100% guarantee cracks wont re-apear. It might have nothing to do with the ceiling at all.

I worked on a lads house who got loads of cracks after they installed a speed bump outside his house.

Overboarding gives more chance of less cracks I agree, but I still wont offer a 100% cast iron guarantee, it just makes you look a dick it if does crack.
 
I just did a job for a developer, the spec was dot and dab over polystyrene. I told him I wasnt 100% happy with that and suggested we also fix the boards in place with some hilti fixings but he said no.

3 weeks later you can see every board where it has cracked.
 
just priced a job for a civil service in town, lath and plaster ceiling, did one last year for em and theyre well happy...

explained again all the pro's and cons to the new manager... btw my method is to scrape all the loose plaster off the laths with an upside down shovel (you get em from aussie screwfix.com) then board over the laths, just to save the boards having to hold around 15kg per m2 of old sand/lime plaster....

they can have the board over or the scrape and board but not the overskim....

waiting for authorisation from the chairman... prolly shocked at the price... how much you reckon i went in at?
4.5 x 2.5 clear room, clearish building, van right outside the back door, done at a weekend cos its a 'drop in' type centre during the week....


if anyones quoting against me, i did the last one and its pukka, theyre well happy with the job so dont waste your time ;D
 
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