Qustion about foam board?

[kybob]

Like most newcomers of late, I have been lurking around for a while getting ideas here and there. I should back up just a little. I live in the northeastern part of Kentucky and weather permitting, will be starting on digging the holes for my 40 x 64 x12 pole barn within the next week or so. Maybe. Weather doesn’t look very good right now, so I don’t know when they will start. I plan on finishing the inside myself as time and money allows. The barn will be used to house my bass boat, truck, lawn equipment, & want to put in a wash bay to keep vehicles clean as possible even in the winter months.
Anyway, I saw on a GJ thread where someone was going to put foam board in between the girts and purlins. Sounded like a good idea, so I decided that’s what I would do. I was talking with my contractor, & he made a suggestion that I just go ahead & put the foam board on the outside of the girts & purlins. Of course I would tape all seams and joints. I have several questions about doing this and need some opinions.
First, what size foam boards do I go with assuming that they will be going on the outside of the girts/purlins. In other words, poles, then girts – 2x6’s; 2x4’s, then either ½”, ¾”, 1” foam board, then bubble wrap, then metal.
Are there any down sides by this type of installation? Am I going to run into any problems down the road when I go to install windows, doors, etc.?? Should I also go ahead and add foam board in between the girts/purlins or is that overkill?

 

[NUTTSGT]

If you are putting it between the purlins and they are 2x material, use 1 3/4" thick foam. There is no reason to use something that will not fill the entire gap, like 1" thick foam.

 

[kybob]

Well, prior to talking with my contractor, my intentions where to go with 1 1/2" foam board, because a 2x4 is only 1.5" thick if that.

 

[trbomax]

Like most newcomers of late, I have been lurking around for a while getting ideas here and there. I should back up just a little. I live in the northeastern part of Kentucky and weather permitting, will be starting on digging the holes for my 40 x 64 x12 pole barn within the next week or so. Maybe. Weather doesn’t look very good right now, so I don’t know when they will start. I plan on finishing the inside myself as time and money allows. The barn will be used to house my bass boat, truck, lawn equipment, & want to put in a wash bay to keep vehicles clean as possible even in the winter months.
Anyway, I saw on a GJ thread where someone was going to put foam board in between the girts and purlins. Sounded like a good idea, so I decided that’s what I would do. I was talking with my contractor, & he made a suggestion that I just go ahead & put the foam board on the outside of the girts & purlins. Of course I would tape all seams and joints. I have several questions about doing this and need some opinions.
First, what size foam boards do I go with assuming that they will be going on the outside of the girts/purlins. In other words, poles, then girts – 2x6’s; 2x4’s, then either ½”, ¾”, 1” foam board, then bubble wrap, then metal.
Are there any down sides by this type of installation? Am I going to run into any problems down the road when I go to install windows, doors, etc.?? Should I also go ahead and add foam board in between the girts/purlins or is that overkill?

Do a search for "Turbo's wall construction" That is how I build walls, and it works.

 

[NUTTSGT]

Well, prior to talking with my contractor, my intentions where to go with 1 1/2" foam board, because a 2x4 is only 1.5" thick if that.

That is what I would use and I'd put it between the purlins not over them. I've never seen anybody put foam board over the purlins with the metal siding right on top of it.

 

[kybob]

Thanks NUTTSGTN & TRBOMAX for the info. Enjoyed your thread very much Trbo. Good read. I've learned a lot just reading your thread. Thanks again.

 

[Too_Many_Tools]

Like most newcomers of late, I have been lurking around for a while getting ideas here and there. I should back up just a little. I live in the northeastern part of Kentucky and weather permitting, will be starting on digging the holes for my 40 x 64 x12 pole barn within the next week or so. Maybe. Weather doesn’t look very good right now, so I don’t know when they will start. I plan on finishing the inside myself as time and money allows. The barn will be used to house my bass boat, truck, lawn equipment, & want to put in a wash bay to keep vehicles clean as possible even in the winter months.
Anyway, I saw on a GJ thread where someone was going to put foam board in between the girts and purlins. Sounded like a good idea, so I decided that’s what I would do. I was talking with my contractor, & he made a suggestion that I just go ahead & put the foam board on the outside of the girts & purlins. Of course I would tape all seams and joints. I have several questions about doing this and need some opinions.
First, what size foam boards do I go with assuming that they will be going on the outside of the girts/purlins. In other words, poles, then girts – 2x6’s; 2x4’s, then either ½”, ¾”, 1” foam board, then bubble wrap, then metal.
Are there any down sides by this type of installation? Am I going to run into any problems down the road when I go to install windows, doors, etc.?? Should I also go ahead and add foam board in between the girts/purlins or is that overkill?

You sure about the wash basin INSIDE the building?

How will you get rid of the moisture?

 

[ericburns4]

NuttsGT is correct the foam board is not to be used above the purlins.

 

[bigguns69]

This is what I did, 1 1/2" polystyrene in between girts, then vapor barrier tacked up, then 6'x15' bat insulation, then 7/16" OSB plywood for finish. Nice and tight.

Used nails and drove part way into girt and then bent them over to hold polystyrene in place. Hung the bat insulation with 6" long timber screw with washers, through the bat, and screwed partially into the outside girts, then completed with inside girts and osb.

 

[kybob]

I like what you done also. Too far down the road yet as to what I'm going to do about finishing the inside. As I want a wash bay inside, leaning toward metal in that area anyway. And leaning toward metal for the ceiling. I like Turbo's idea about using foam for the ceiling and walls. May go that route. Going to have to sit down and do some figuring. Very rough estimates looks like in the neighborhood of $3 to 4K for foam board & bat insulation. Maybe more. Havent priced the metal yet. Like I stated, to far down the road.

 

[Air_Cooled_Nut]

Do a search for "Turbo's wall construction" That is how I build walls, and it works.

I added the link Click on the text 'tween the quotes.

 

[joshuaz223]

putting the foam on the outside is not a good idea. it will seriously take away from the rigidity that the metal is supposed to add to the building.

 

[jack stand]

It may have been one of my posts, or at least that's how I did my bldg. It was a "post framing" decision. I had the building up with 16"oc 2x6 studs (16' tall) and the wall girts & metal on. Then I found a place that sold used ridgid insulation sheets. They get PAID to remove them from commercial re-roof jobs, then sell them, pretty slick eh? But the price was very good (about $7 for a 4x8x1 1/2" polyiso) and the p.iso is the highest "R" pre inch of the foams 6.5 to 7 per inch. So I paintakenly cut the foam to slide in from the inside between the wall girts, luckily I had tyvek'ed under the metal so that it slipped in without hanging up in the metal. Then I foamed in all the cracks with a foam gun, put another layer vertically in the "stud bay" and foamed that in also. This left room for 3 1/2" of FG for a wall R value above r-30. Not sure if all this is needed in KY but I'm enjoying it here in ME. I did not notice, are you heating this bldg?
I agree that I would not put the foam on the wall girts. Although your would have a better insulation (no thermal bridging) you would need to do some serious diag. bracing and need some looong screws!

 

[kybob]

Jack Stand, Haven't got that far as to how I am going to heat. My first option & intentions is to use propane. My building will mainly be used for storage, but will be in there a lot, especially during the winter months, to wash and clean up my car & truck. I want to keep it above freezing all the time & be able to turn heat up & get it warm enough to work in in a manner of 30 minutes or so. Was advised just the other day to check out infarred strip heaters. Have not done that as of yet. Quick note: I am using a double car garage right now that is insulated very good, stick built, sheet rocked inside walls, & just on a trial basis, am using a little old electric bathroom heater & with a low setting, keeping the area decent. Meaning, with outside temps in low teens, inside garage is, best guess, low 40's. Which i don't think is bad. An area of about 700 SF. When I get there, I hope to have this pole barn that good.

 

[kybob]

I do have a quick question for Turbo. In your wall construction thread, the metal piece along the bottom on the inside where the finish metal will sit on at the bottom, next to the floor. Is there a name for that piece to ask for at the building supply or is that a custom made piece? Going to go back to try and locate that pic. Never mind. Went back and found thread and reread. Made it from coil stock. Great idea.