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Discussion Starter #1
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?
 

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BUILDER / REMODELING CONT
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I agree Not on a metal building. Unless the metal siding is being installed over plywood wall. I'm assuming your building the panels a screwed over horizontal furring?.
 

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Discussion Starter #3
Thanks for the reply, buletbob. I'm not sure what you mean by horizontal furring but I should have described my building a little better. It's a stud wall built with 2x4 boards, with the metal siding screwed on to it. No plywood. From the inside of the building the layers will be drywall, R-11 insulation between the 2x4s covered by a vapor barrier, then the metal outside. So if the buliding was complete and you removed a panel of metal on the outside, you'd see the insulation between the 2x4s. That's the way I understand it anyway!
 

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BUILDER / REMODELING CONT
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Now that you mentioned 2x4 wall construction, For the added $300.00 in material it will give your wall a second barrier from water intrusion if the metal fails for some reason. I originally thought all steel building, and how are they going to fasten the tyvek to steel. The choice is yours.
 

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Lic. Builder/GC/Remodeler
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I'm with Bob. You have wood framing and insulation in the structural wall. Use the Tyvek for the reason Bob listed (second barrier from water intrusion).
 
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