Hi all I have been asked to clad a breezeblock wall with oak sleepers, Ive been wondering how to fix to the wall itself, Maybe drilling through sleeeper with coachbolts into wall. Are there many other options? The wall has been built some years ago. There is no room to fit posts behind or anything.
Subject to ground conditions, I would secure the bottom layer into damp concrete using stud or road pins. Then, build up the layers using Timberlok screws (www.fastenmaster.com) into the sleeper below, after countersinking the holes. For 'belt and braces' I would also drill into the wall using Timberlocks but they will probably need plugging into the blocks and that will take some accurate drilling.
Picture of a free standing wall built this way, attached. for safety we also braced the front with some timber and it's not going anywhere.
Use concrete screws.
Just pilot a 6mm holes through the timber and masonary and bang them in. Will need an impact driver or sds to put them in though
What a faff, just bolt them to the wall with concrete screws no plugs required.
I would be setting the bottom sleeper firmly into the ground preferably into concrete with threaded bar then fixed with lock washers and nuts countersunk into the sleeper (preferably stainless steel to prevent corrosion) I would then use countersunk Timberlok's to secure the layers whilst also attaching every other one to the wall using a stainless steel right angle bracket.
I am certain that my method is probably over the top for most, but I do like to over engineer things.
Also, depending on the height of the wall, have you considered using the sleepers vertically? It gives a different finish to the usual horizontally stacked sleeper walls which are common place? I like to use them vertically and curve them to soften edges :o)