Hello everyone, new member checking in! Lots of good info here. I'm having a new shop/garage building put up and I'm researching all my options. It's a 40x60 garage building, metal sides and roof, with insulation and drywall on the interior (10 foot walls). I have some bids from different contractors to build this new shop building. One guy said it needs Tyvek house wrap, another one said it wasn't needed on a metal building. I want a good building but I need to save money... this is already costing me a fortune. So, do I really need it?