Here’s how to make a nestbox in four easy steps.
Mark up a wooden plank as shown, cut into pieces and drill a hole in the front section – 25-30mm diameter for blue or great tits. The plank should be at least 15mm thick.
Nail or screw the bottom, front, back and sides together. To help the lid nestle into the box, you could chisel out a groove from the backpiece.
Make a waterproof hinge for the lid from butyl rubber, roofing felt or a piece of bicycle inner tube. Cut to width of box, nail first to lid then to the back.
Site the box at least 3m from the ground away from strong sunlight, prevailing wind and rain. Place away from feeders to avoid disturbance.