Re: Temporary Window Sash
As Phil said, plus you might want to back that plywood up with some rigid foam insulation attached with construction adhesive. Use some closed-cell foam self-adhesive weatherstripping between the plywood and the jamb to form an airtight seal.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.