Thinking of having one of these. I'll be plastering upto it after it's installed. But how do I fix it securely with hidden fixings on to the concrete lintel that forms the top of the builders opening. I do want it flush with the bottom of the opening.
1/ Some sort of rebate. 2/ From below straight bracket flush with bottom surface and screwed to lintel. 3/ ?Oh and what is the going rate for a sleeper that isn't going to reak the house out with creosote or similar.