Stu84

Ideal. Think best thing I can do is stick one in the wall and give it a pull! Or trying to find a matching brick and experiment. Thank you.

That's what I was hoping to hear markc. I'm probably overthinking it but the Fischer loadings (they have lots of useful documents) assume a certain compressive strength of brick. I've read on a different post that if you can't positively identify your brick type then you have to assume a very low compressive strength... lower than what Fischer used for their experiments. Any idea whether all bricks of a certain age (i.e. post 1970s for example) can just be assumed to have have a certain minimum compressive strength? Thanks for replies

That's a thought. Would building control be happy? Do the instructions that come with the kits say bed joints OK? Thank you

Hi everyone. First post here. Great to be part of this friendly forum, lots of amazing info. I'm designing my own small side extension. A lean-to 4x3m. Looking to use wall starter kits and a ledger board to hold the rafters. Only thing is my bricks are vertically perforated, not solid right through. It's a 90s house so they aren't soft, but I don't know the brick type nor their compressive strength (more compressive strength = better resistance to anchor breaking through the side of the brick under load) The chemical anchors by Fischer seem on paper like a good option. This involves inserting a plastic sleeve with holes. You fill with resin which expands through the holes of the sleeve and push threaded bar in. I guess the resin bonds to bits of brick/mortar and also increases pull-out surface area. Anybody have any experience of this type of anchor in perforated facing bricks? Other ideas welcome. I'm trying to avoid tooth brickwork. I suppose I could replace a number of bricks with solid ones, but it would be quite a number all said and told. I'm hoping the wall starters don't take much load. Aren't they mainly to resist wind loading? It's the ledger board and roof weight I'm more concerned about. Thanks all Stuart