Browse Forums General Discussion 1 Mar 03, 2015 10:47 am Hi, I am in the process of installing some cornice in my kitchen. Due to uneven ceilings and walls I am left with small gaps that I now need to fill. I did as much as I could with cornice cement but it is not ideal as the cement is very gooey and sticks to my broad knife. Can anyone please advise what I should use for this? At the moment i am considering spack-filler, no more gaps or one of the pre-mixed gyprock products. Which will be strong enough to not crack later on but will be easy to sand ? Gyprock multi purpose joint compound, or "final finish" ? Also, I need to fill a gap that appears behind my benchtop prior to tiling my spash back. The gyprock wall bows outward despite the best efforts of our builder (old house, bad walls). The gap spans 1 metre and is 12mm at the middle. I need to build it up so that it becomes flat. What material would be suitable for building up something to a depth of 12mm that can be tiled over ? Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Fixing Cornice 2Mar 10, 2015 7:08 pm I don't know how far you got with this but I read somewhere that cornices are stuck to the ceiling not walls. This allows the cornice to move up and down slightly with wind load on your truss without cracking them. A flexible sealant is used on the bottom to seal it. Re: Fixing Cornice 3Mar 10, 2015 7:23 pm Quote: Also, I need to fill a gap that appears behind my benchtop prior to tiling my splash back. The gyprock wall bows outward despite the best efforts of our builder (old house, bad walls). The gap spans 1 metre and is 12mm at the middle. I need to build it up so that it becomes flat. What material would be suitable for building up something to a depth of 12mm that can be tiled over ? In my kitchen I re-sheeted the wall with structural ply and packed the sheets out so they were perfectly flat and matched the bench top. In my laundry the existing walls were cement sheet so I covered the sheet with cement tile adhesive. Once it had set I built it up so it was flat with cement render. Re: Fixing Cornice 4Mar 11, 2015 7:45 pm Crazyk I don't know how far you got with this but I read somewhere that cornices are stuck to the ceiling not walls. This allows the cornice to move up and down slightly with wind load on your truss without cracking them. A flexible sealant is used on the bottom to seal it. This is the original theory behind it, I don't know of anyone who does this. This also makes me laugh when people get all upset and antsy on this site about proper L bracket installation when the cornice is going to is going to resist movement a lot more then a clout driven home Re: Fixing Cornice 6Mar 11, 2015 7:58 pm The builder should have ideally ran a straight edge over the studs prior to sheeting and put ply packers on the studs as appropriate. But that doesn't help you now, try this.... Put a 5mm packer up the stud or glue to the sheet where it gets out to 12mm. Now, find where it gets back to 5mm each side of the centre. Cut a piece of 4-5mm cement sheet and glue and or nail it over the top. This should flatten out most of the hollow, a few mm here and there or where the piece of cement sheet ends and needs to be feathered back to nothing could be made up with a larger notch trowel. Re: Fixing Cornice 7Mar 11, 2015 9:49 pm If you can get access to the roof space where the gap between cornice and ceiling is pop the sheet off the truss and pack it down however far you need too. Then re screw the sheet up through the packers, as well as using stud adhesive either side of the fixing. For the wall behind the bench cut a neat hole beside the studs you need to pack out, make it big enough to get your hand in, use a flat blade to get between the stud and sheet so you can pop the screws or glue. Get a packer the size you need and with some liquid nails stick it beteen the sheet and stud. Put some timber behind the hole you cut, screw the piece back do a quick patch then tile away. The photo is not really clear but to me it looks like twist in the cornice. Slight anticlockwise rotation at the top of the cornice and slightly clockwise at bottom should… 8 8474 I'll look into different shower heads and ask the plumber about some engineering and see what he says. Thanks 2 9551 Plumbers 'can be' plumbers, made all the worse by self certification which the building surveyor invariably accepts as proof of compliance! The good thing is that you know know. 3 4835 |