Metal roof raining on you?

[Ryan Mahar]

Building new sugar house. My question is what is the thought regarding metal roof layed simply on roof purlins, so you can see metal from inside, vs. laying metal down on plywood sheathing so you see wood from inside. Primary concern is condensation build up on metal and having water dripping down all over ( more so than a wooden ceiling). Thanks for any thoughts from experience??

[Bucket Head]

How well will your steam be able to exit the building? Do you have a tight fitting hood with a steam stack that will go through the roof or at least terminate in the cupola? I've seen lots of sugar houses with steel-only, but they had no steam evacuation issues. Thats the key. If you don't plan on having a hood/stack, the plywood would be a better way to go, even though it would be a little more expensive.

[PerryW]

Yes, if you see the metal roofing from the inside, you will get rained on when you are boiling (at least w/ open pans)

[tuckermtn]

I would highly reccomend putting the metal over something other than strapping.

An alternative to the plywood under the metal roofing is to use a 1x8 or 1x10 pine shiplap boards. You can often get bundles of "seconds" or my local mill calls them "planer outs". The pine boards in my opinion are beautiful to look at under the roof, and there are no glues to worry about like you would have with plywood. Also chances are the pine is cut locally and you are supporting the local economy...

just my $.02 worth

[tuckermtn]

You could try Mill River Lumber in N. Clarendon VT 802-775-0032

[Ryan Mahar]

thank you for advice. Wood seems to be the best bet. I hate to go with plywood so will have to check with the guy milling out my lumbar to see if the 1x stuff is reasonable.......thanks.

[maple flats]

I ran my steel roof on purlins spaced at 12" O.C. It sure did rain inside the first year. The following year I made a hood, extended the steam stack up into but not thru the cupola, then I got no rain inside. Thus, if you have a good hood you can get away with it, but it is not ideal. I am building an addition on the sugarhouse this year ands it WILL have solid cover wood of some type before the steel goes on.

[Ryan Mahar]

Thanks for reply, I have a steam away on back pan with the stack running up into cupola , but nothing on front, but I think I will be alright....According to leader evap, the state is soon to mandate hoods on everything, so looks like I will have one on the front pain in the next 5 years.........This will save me a few$ not having plywood or planks... thanks again.

[Flat Lander Sugaring]

i just did mine on strapping on a 8/12 pitch and i have a decent sized cupola and it rained on me. So if you dont want it to rain inside the sugar house put plywood or something else down first

[Father & Son]

For the first seven years there were cetain places I could stand when boiling without getting rained on (metal roof). This year was the first years with hoods. I ended the steam stack in the cupola and it still rained off the cupola roof. Steam stack will go through the roof this summer.

Jim

[gcec]

I have 1' Foil Faced foam insulation fastened to my purlins between the rafters extending from my cupola to the
ends of my overhang. It stops the instant condensation on the metal roof and lets whatever
condensation that forms to run down the foam sheathing to the outside.

[Ryan Mahar]

INteresting idea, any chance you have some pictures to show?

[Z/MAN]

I'm planning on installing that thin folded foam insulation before the metal roof. I'm thinking this should be enough to stop the raining inside the shack. Cheap,easy and hopefully it will do the job. Feedback??
Paul

[Flat Lander Sugaring]

I'm planning on installing that thin folded foam insulation before the metal roof. I'm thinking this should be enough to stop the raining inside the shack. Cheap,easy and hopefully it will do the job. Feedback??
Paul
i was gonna try proper vent

[heus]

I would not leave any exposed metal even with a hood. The room next to my evaporator has an exposed metal roof and sweats whenever there is a big temperature different between outside and inside. That's with a steam hood.

[adk1]

I had some of this my first year. I put up a box fan to help wit hthe draw out of the cupola. It did help alot but would rain down on us too. I am going to add something under the metal this year directly above the evap

[SevenCreeksSap]

I did wood over the whole roof under the metal, but didnt do it on the cupola. Now it rains a rectangle the shape of the cupola. where there's wood, no rain.

[Paddymountain]

What does everyone think about 1" styrofoam , between the rafters before putting up shiplap boards? I was going to put insulation up before putting up inch shiplap pine.
My sugarshack is 12x16 so it would be only 8 sheets. I think it may help keep it warmer if you were just filtering/bottleing and not running the evaporator. I have a hood suspended above both pans, but it didn't seem to make much difference. One thing though, I don't have the pipes closed in at the cupola, some people have told me they think it
would pull a better draft if it was closed up so all the steam had to go up through the pipes. Any thoughts?

[Paddymountain]

See my post just before this one. Anyone have any ideas? pro or con with the insulation board?
thanks!!!

[cropseyvillemark]

I put some straps under the rafters,then put up some plastic roof sheets. At the bottom of the sheets, along the top plate is a lenth of rain gutter. It was cheap and works flawlessly.