I am just taking the cautious assumption that these walls won't be able to hold the weight of the tiles. Agree. Joist span Bridging Girder load width Half joist span Live load on roof = local requirements for wind and snow. The problem is that i want to tile the full room from floor to ceiling with 600x300 tiles (travertine effect ceramic probably).....But 2 of the walls are lath and plaster (skimmed). Every 12″x12″ span of 1/2″ drywall can hold 40lb in pull out load, as if you were hanging from a ceiling. ft.) Dead load of roof of wood shingle construction = 10 lbs. 3163 16 1616 16 Flat Rib Lath 2.75 lbs. Updating lath and plaster walls to drywall can be done by covering or replacing them altogether. Note: The above estimate assumes the plaster is dry. jrapps. Your wall will be able to take as much weight as you can hang on it. It MIGHT work if you used toggle bolts and really spread the load out, but I would not risk it. ft. As a general rule, we estimate plaster to weigh around 11 pounds per square foot. There maybe a specialist fixing but I've not found one I've had the same issues with boilers on plasterboard. How much weight can plaster walls hold? Your wall will be able to take as much weight as you can hang on it. You need to find the joists. How much weight you can hang on the stud depends on what you hang it with. 5 5 Answers from MyBuilder Electricians. 316 16 1212 12 3.40 lbs. If you don’t have a stud finder, you can find studs by tapping on the wall while moving in a horizontal line until you hear a solid sound rather than the usual hollow sound. Plaster, 1" 8.0psf Plaster on wood lath, 1" 10.0psf Plaster on metal lath, 1" 8.5psf Roofing Asphalt Shingles 2.5psf Wood Shakes 3.0psf Roll Roofing 1.0psf Asphalt Shingles, approx 1/4" 2.0psf Cement asbestos shingles, 3/8" 4.0psf Clay Tile (add 10psf for mortar) 9.0psf Ludowici 10.0psf Roman 12.0psf Slate, 1/4" 10.0psf Spanish 19.0psf Originally Answered: How much weight can a hollow wall/ plasterboard wall take? The lath and plaster is not going to be strong enough to hold this, especially from the ceiling. The other type of load is shear or pull down load. If hanging a light fitting on a lath and plaster ceiling under a flat roof (with no guarantee of finding a joist to screw into) what’s the heaviest weight of light fitting you would recommend to avoid any problems? The complicated area is making the seems "disappear" although if this is lath and plaster you're able to be able to patch it in an identical way, yet you're able to be able to ought to post some "nailers" for the sides of the patch. Water-soaked material will be much heavier. per sq. posted by rockindata at 3:12 PM on December 14, 2013 . Im not a fan of toggles on lath and plaster and with the weight probably over 60kg I would not chance it. Plaster. (Usually 30 lbs. A 1 1/2-inch (4d) nail driven in at a 45-degree upward angle can hold as much as 20 pounds. 16 16 1616 16 3/8” Rib Lath … Sometimes you just have take it down and build some support. Originally Answered: How much weight can a hollow wall/ plasterboard wall take? yard) Wood Solid Plaster (Metal) Other (Metal) Wood or Concrete Metal 3 Diamond Mesh Lath2 2.50 lbs. If your plaster walls have seen better days, you may be eager to upgrade to drywall panels. 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