I'm asking a few wood working question in relation to an owl box I'm making to put on my property. My question is about drain holes in this and any bird box.
I've always put drain holes in bird houses I've made, because they've called for them. However, they don't make much sense to me. It seems like any bedding or nesting material would absorb any pee, and there wouldn't be enough to need draining. I'd also think that general debris would clog any drain holes.
Firstly, do you guys think that drain holes are necessary? The only real use I can think of is that they might be for any rain that gets in. However, if nesting material and bird crap get in them and clog them up, they wouldn't even drain that. It seems to me that it'd be more important for air circulation to get rid of any toxic fumes like ammonia from the pee and to evaporate any liquids.
Secondly, if you think they are necessary, how do you recommend doing them. Would you just use holes, slots, or like some I've seen, would you chamfer the corners of the bottom so you have a vent on each corner? Will any liquid even run to these vents or would you need to work the wood to have some kind of slope to direct it to the corner holes? Thanks for the help.