Comment on ribbed plastic anchor in brick not holding -- what screw diameter do I need?
povoq@slrpnk.net@slrpnk.net 17 hours ago
But an 8mm screw is fat enough to rub sides of the anchor as it is inserted because I suppose the anchor is only 1mm thick at the opening.
It is really unclear what you mean by this.
Using these plastic anchors is basically a destructive process, so I don’t see an issue with the screw cutting into the plastic.
Another issue is often that you have hollow core bricks and thus the anchor ends up partially in the air, maybe double-check that this isn’t the case?
diyrebel@lemmy.dbzer0.com 17 hours ago
I don’t care about the plastic but my concern is that I would make it so tight that it cracks the brick.
I’m sure the bricks a solid; likely 150+ years old, back when all bricks were solid. But since they are old, they are probably fragile despite being solid.
Hmm, yeah. Old burned bricks can be too powdery for regular anchors to hold well. There are anchors meant to be used with an special putty you put into the hole first and which seep into the brick to some extend.
diyrebel@lemmy.dbzer0.com 16 hours ago
Sounds like chemical anchor, which is a 2-component epoxy. I used that when installing anchors on my roof to use for abseiling. Did that because my life depended on it. But otherwise I try to avoid chemical anchors because they cannot be removed later. I could get out an angle grinder at that point, but there may be a day when I decide to remove all the render to expose the natural brick, in which case the anchor would always be an eyesore.