Sep, Oct, Nov
Choose a selection of twigs and sticks of different thickness. Ensure they are dry as insects can succumb to fungal infections in winter if exposed to damp.
Make a simple box using thick, untreated wood. There's no need to add a back or front to it. Insert the larger pieces first. Cut hollow bamboo stems to length and add them to your chimneypot, inserting them around the logs. Make it a tight fit so they don't fall out.
Add the thinner sticks afterwards. Pack the box quite tightly so the twigs and sticks don't fall out - there will still be plenty of nooks and crannies for insects to sneak into. Place the box in a sunny, sheltered site ideally off the ground. It should attract new residents within a few weeks.