It's certainly a lot cheaper buying in bulk, Tiger Foam even have a
Canadian site! - I'll follow up with them about a smaller pack, 600
board feet for slow rise is double what I need, plus I'd have to do the
whole house in 5 or 6 days. I don't think my wife will appreciate holes
all over the house in one go, probably better if I can do one wall
section at a time or at least one room at a time and fill the holes and
paint then move onto the next room.

David