Single bubble or tyvek for wall wrap?

[1966chevelle]

So I'm about to send the down payment for my 40x40. I asked the builder to install house wrap on the walls before he installs the metal outside. He quoted me $900 for single bubble or $450 for tyvek. My question is which is better? I'm going to put up insulation and metal interior walls. I know that $450 isn't much more but my money is starting to get tight with the extra add ons. $450 is almost what my wall insulation is going to cost. If there is a big advantage to single bubble vs tyvek? I will deal with it but if it's a waste I will have him fix the quote. Thanks again for all the help.

 

[Dragfluid]

Don't screw around with that bubble ****. Use the regular house wrap. Tyvek is one of many.

 

[Jamie V]

Do you need anything at all?

 

[Marctrees]

So, if it's being covered w somekinda Rpanel, meaning steel, with an extremely high perm rating, what is being gained by putting Tyvek under it????

The Tyvek is redundant under the steel.

Total waste of $.

Think about it , .... then answer. Marc

 

[Marctrees]

In Indiana, ... Why are you not using like 3" fiberglass wide like 4-5' batts under your sheeting?

Marc

 

[theoldwizard1]

A lot more money, but a lot more effective. 2" of spray foam. Pretty much guarantees no air leaks.

 

[tomralph]

Based on this forum I went with Tyvek in between the metal and inside. Now I am sealing that with foam.

I have not decided if it will be 2" spray foam or 1" foam or foam at all the seams/connections.

Either way if I damage a panel I can replace it with minimal work.

 

[matt_i]

I'd use tyvek. If nothing else for use around the windows and doors for another weather resistive plane to flash or seal to with peel + stick. Ive seen a lot of metal-sided buildings on this forum with janky attention to flashing around the windows by builders working at light speed. If they tape the seams and laps it adds some air-tightness as well.

 

[rburke65]

My shop outside is covered with OSB, Tyvek and the the metal siding. If the OP says he'd like to save the $450 I'm betting he's not looking to finance spray foam.

 

[Jeepster04]

Tyvek is in no shape form or fashion redundant with a steel panel.

When I was building my pole barn I did not use a house wrap. As I neared the end of getting the side metal put up, I hadn't put the sliding door up at the end and the wind was blowing into the building. It was at the point that I realized it was a mistake not using a house wrap under the metal as the amount of air that was being forced out between the panels was quite amazing. That property was sold and I will be using a house wrap on my next building.

 

[ard]

Tyvek. The bubble provides almost negligible R value benefit, but is possibly the most espensive 'r value per dollar' product. But you definitely want to control airflow, as above air WILL move through the walls without it.

 

[1966chevelle]

Let me start by saying I know nothing about construction so that's is why I read and listen to every option I have. Well here was my concern. If I don't wrap the walls and I install batt insulation I was afraid it would start to mild due to moisture between the metal and insulation.

 

[1966chevelle]

My shop outside is covered with OSB, Tyvek and the the metal siding. If the OP says he'd like to save the $450 I'm betting he's not looking to finance spray foam.

You are correct sir. I would love to have the whole barn spray foamed but I decided that I could save that money and add square footage to the barn instead.

 

[mrpizza]

I specified regular housewrap under my metal for the barn currently under construction. Only reason is when I spray foam it, the warranty stays valid for the metal.