CT-04Drill and plug the fixing pointsSolid brick and dense concrete block both need a masonry bit and a hammer or combi drill set to hammer action. Drill straight and steady, about 5mm deeper than your wall plug's length, then blow out the dust and push the plug in flush. Lightweight aircrete block is softer and drills faster — go gently so you do not blow out a bigger hole than you need, and use a slightly longer plug if the block feels crumbly. If a fixing point lands on a concrete lintel above the window, expect much harder, slower drilling and use a fresh, sharp masonry bit. If it lands on a steel lintel, stop — you cannot drill into steel with a normal masonry bit. Shift the bracket sideways onto the brick next to the lintel, or fix a short timber batten across the gap into brick on either side and screw the bracket to the batten instead.