New pole barn build, a few questions

[pat1016]

Hello all, I’m in the process of putting up a small post and beam garage on my property. It will be a 25x36 with two foot overhangs all around except for the front which will be around 4 foot ( over the garage doors). There will be two garage doors on the long side, and a man door on the side. I am located in NJ. It will have electric for lighting and outlets.I It will not be insulated . I might add a small wood stove for heat at a later date. I have a few questions.
The roofing will be installed on double bubble foil wrap.
1). Should the siding be installed over a condensation membrane ?
2). Should I worry about dripping from the roof? There will be a ridge vent and two vents on the gables.
Thank you
Pat

 

[jack stand]

The bubble stuff is a gimmick, there might be some purpose in the dessert southwest with super sunshine. I'd spend my money having Tyvek installed instead. The white color (printing out) brightens the inside and keeps the wind out along with a high degree of keeping water out along with the underside condensation. But you didn't mention what you are using for the wall siding or roofing.
You'll appreciate the generous overhangs!

 

[billconner]

I believe the double bubble will reduce condensation on underside of metal roof. I would not want it on inside of exterior siding/sheathing if I had any plans to ever insulate and add interior sheathing/wall.

Key is what are plans if any to insulated and/or finish?

Storing cars and wood stove may be fire code problem, more likely insurance problem. Just beware.

 

[pat1016]

The bubble stuff is a gimmick, there might be some purpose in the dessert southwest with super sunshine. I'd spend my money having Tyvek installed instead. The white color (printing out) brightens the inside and keeps the wind out along with a high degree of keeping water out along with the underside condensation. But you didn't mention what you are using for the wall siding or roofing.
You'll appreciate the generous overhangs!

I am having metal roofing and siding installed. Do you think drip stop would be better?

 

[pat1016]

I believe the double bubble will reduce condensation on underside of metal roof. I would not want it on inside of exterior siding/sheathing if I had any plans to ever insulate and add interior sheathing/wall.

Key is what are plans if any to insulated and/or finish?

Storing cars and wood stove may be fire code problem, more likely insurance problem. Just beware.

There is no sheathing under the metal roofing or siding.
there are no plans to insulate. It will basically be for one car and work area. Of course lawnmowers and other tools. Stove would not be used that often, and I could pull vehicle out when stove is used.

 

[rburke65]

The bubble wrap is…….poo

 

[rburke65]

And to the OP….where do ya live….state…climate?

 

[billconner]

And to the OP….where do ya live….state…climate?

NJ he said.

 

[jack stand]

I am having metal roofing and siding installed. Do you think drip stop would be better?

I've never used drip stop before but I have put tyvek over the purlins not particularly for dripping but either it works or my climate (that I don't think is especially dry or humid) is just right and there's no signs of dripping. I have other sheds, building and leanto's that don't drip without the tyvek. Dripping seems to be dependent on your humidity, ventilation, orientation to the morning sun and probably some other things that I don't understand. When I lived in the mid Atlantic region I had a 3 sided shed that would almost (not really) rain inside for a short period of time until everything "equqlized".
So basically, I don't know. The drip stop is your decision. In my drippy shed it didn't matter with a gravel floor and a machinery shed.

 

[Pompey]

I live in North Carolina and I have never seen condensation on the roof or walls of my metal clad pole barn. I think the sun is strong enough to warm the metal and to keep it dry.

 

[AC-WC]

Did mom's replacement 30X40 last year with the housewrap on the exterior but not the roof. The roof panels came with a 'flock' material and we have not had any drips so far. The previous barn was all metal structure and condensate was horrible. I think it had to do more with the wood frame vs 2X2 metal structure. My 20X30 pole barn has never had condensate drips with no insulation or wrap.

 

[Shoester]

I believe the double bubble will reduce condensation on underside of metal roof. I would not want it on inside of exterior siding/sheathing if I had any plans to ever insulate and add interior sheathing/wall.

Key is what are plans if any to insulated and/or finish?

Storing cars and wood stove may be fire code problem, more likely insurance problem. Just beware.

Why would you not want the underlayment if you were planning on insulating?

 

[Firebrick43]

I have neighbor down the road, 30x40 pole barn, with an absolutely monstrous wood stove the thing is 3'x4'x4' tall with hot air tubes through the smoke chamber and a blower. Until I helped him put in a ceiling (uninsulated) to block all the heat going thru the sofit and ridge vents, the stove was worthless to heat the place other than to warm up next to. With a liner ceiling it doesn't take that big of fire or it will run you out, and its cooler in the summer to boot.

Why would you not want the underlayment if you were planning on insulating?

A condensation blanket/ drip stop / what ever you call it will be no issue if you put a traditional ceiling on the bottom chord of the trusses with insulation on top of it.

It might be an issue for the spray foam fans or those that for some baffling reason want to insulate truss bays like a cathedral ceiling.

 

[billconner]

My concern about double bubble and future insulation was regarding sheathing and siding and double vapor bartier. I agree double bubble under roofing and over a cold, vented attic space is not a problem.

 

[larry_g]

Standard Reinforced w/ Batt (Rolls) - LTH Steel Structures

VRR-Plus is a low cost film/film vapor retarder product with a .03 perm (WVTR )to be used in a high humidity environment with a reinforced metal building insulation with 30 lb of tensile strength and 90 psi puncture testing consisting of polypropylene scrim film with a metalized polyester film...

www.lthsteelstructures.com

I used something like the above. 2" thick with the plastic covering for condensation control in two buildings. Still recommend it after 20 plus years.

lg
no neat sig line