02-13-2012, 06:40 PM
Clay, I'd replace the worst offenders only, to keep the cost manageable. For that matter, I'd start by weather sealing everything first, for even less cash outlay. And where aesthetically acceptable, plastic sheeting on the Exterior will make an enormous difference, and by far the most bang for the buck. Even/especially where you already have plastic up on the inside. And will stop the ghost-like plastic sheet "breathing".