I am in the process of building a sauna in the basement and need to screw up studs on a concrete inner wall. The house was built in '56 and the inner walls are some type of lightweight concrete that just crumbles if you use a hammer drill on it, if you have to drill, you must do it without hammer action, otherwise the hole ends up twice as large as intended. Is there a good plug that can be used for such a wall to make sure things stay attached to the wall?
I have Googled these types of plugs, is there any of these that should work for a porous concrete wall?
http://mediabase.snb.schneider-electric.com/displayimage.ashx?mediano=B229028&T=WJPG
http://static.byggmax.com/media/!Item!24651!productImage!0_24651.jpg/large/L_ttbetongplugg.jpg
http://shop.movab.eu/Img/106/32/1063294l.jpg
I have Googled these types of plugs, is there any of these that should work for a porous concrete wall?
http://mediabase.snb.schneider-electric.com/displayimage.ashx?mediano=B229028&T=WJPG
http://static.byggmax.com/media/!Item!24651!productImage!0_24651.jpg/large/L_ttbetongplugg.jpg
http://shop.movab.eu/Img/106/32/1063294l.jpg
This is the best http://shop.movab.eu/Img/106/32/1063294l.jpg
fits very well, but maybe a bit overkill for reglar.
For reglar, long expansion plugs usually work.
fits very well, but maybe a bit overkill for reglar.
For reglar, long expansion plugs usually work.
In our lightweight concrete walls, I usually go directly with screws, no plug. Drying rack, Elfa shelves, wall cabinets, everything stays up... 
Otherwise, regular soft plugs are best, but I usually only use them for smaller holes, 4-5 mm screws. If you use thicker and slightly longer screws, it holds like a rock.
Otherwise, regular soft plugs are best, but I usually only use them for smaller holes, 4-5 mm screws. If you use thicker and slightly longer screws, it holds like a rock.