I want to mount my 120cm long blinds into the face of the wall above my 110(ish) cm PVC window recess, but I don't feel like standard plugs would be sufficient. There are three brackets, each held with two screws, left and right and another centre. My idea was to glue a piece of timber about 18mm thick (due to availability at the local B&Q) to the wall and wood screw the brackets into that, with 18-20mm wood screws.
First of all, am I right in assuming regular plugs wouldn't hold the weight? And is my proposed solution sensible? I'm not particularly confident drilling into the mantel, but if this would be the best solution, can you provide a good tutorial on what to do?