Help it's raining in my bow roof shed

[Chan]

The condensation in my 18 x 22 bow roof shed is killin me.
I put louvers in the gable ends, I leave the doors open, doesn't matter if I use heat or not as soon as it gets 40 degrees it either hails or rains. Global warming? Normally where I live this time of year the world is a hard frozen cube.
Any ideas?

[openboater]

You need a frost liner, or at least another layer of plastic inside the one you have with an air space between, like an inside umbrella. It's a common problem we had when winter mountaineering.

http://www.wintercampers.com/2010/01/06/characteristics-of-four-season-tents/

[thedutchtouch]

a dehumidifier may help? but let someone more knowledgeabvle weigh in on how that's affect your wood/boat in progress before you buy one

[kc8pql]

You need a frost liner, or at least another layer of plastic inside the one you have with an air space between, like an inside umbrella.
That's the answer. I stapled a layer of poly to the inside of the bows on my shed.

[Ron Williamson]

It's likely too cold for a dehum. to work.
Another option besides the frost liner is to lay poly on the ground with aspenite or plywood over top.
R

[webfoot]

I have a layer of woven poly on the inside but still ended up covering my boat with a tarp slung over a line.

[Ian McColgin]

The frost liner works. That's what folk do around here.

[HarryH]

This may come as closing up after the proverbial pony has left the barn...

I bought "greenhouse" poly for my first Stimson. It featured anti-condensation, anti-UV breakdown, and some infared heat retaining attributes...no multi-layering needed to avoid condensation. That was 10 years or so ago, and was not much more $ than regular poly. Nary a drop fell from the ceiling, and this was over a dirt floor. It was still in very good shape after 9 years when I took it down. Good stuff.

I have just completed another shed, this time opting for the local lumber yard roll of poly for convenience, and I am getting the interior rain, albeit minor. I do not mind it though; prefer it to a bone dry shed.

If you do go for an inside layer of poly though, you will enjoy the benefit of dead air space insulation.

[Chan]

HarryH
Where did you buy this miracle poly?
I think I bought mine at green house supply.
They had a ton of options, maybe I should have looked more closely at them

[HarryH]

HarryH
Where did you buy this miracle poly?
I think I bought mine at green house supply.
They had a ton of options, maybe I should have looked more closely at them


Chan....it was maybe 8 yrs or so ago, and I do not remember the name of my supplier. But just Googling "Greenhouse Poly films", I found a bunch of sites that offer it or something similar. Here's one:


http://www.gothicarchgreenhouses.com/4-Year-Greenhouse-Poly-Film.htm

Mid-way down the page they offer "GT-IRAC - 4 Year Greenhouse Poly Film with infra-red properties to hold in heat and also with Anti-Condensate to diminish dripping within your greenhouse ".

Poke around a bit. Agreed, there is a myriad of choices out there....and it all does not make for exciting browsing.

Hope this helps.

[knottyBuoyz]

I lined mine with Tyvek. Got it on sale at Lowes. Per sq ft it was cheaper than poly.

http://i237.photobucket.com/albums/ff166/KnottyBuoyz/KBIII/IMG_2001.jpg

[Chan]

Thanks HarryH
Thats an interesting idea knottyBuoz, but I really like the clear plastic, I already have a dark artificially lighted place to work

[Chan]

The moisture seems to have gone away, maybe it just took 2 months for the ground under the shed to dry, no problems even with propane heat.

[kc8pql]

More likely just lower relative humidity in mid-winter.

[sovt]

"The moisture seems to have gone away, maybe it just took 2 months for the ground under the shed to dry, no problems even with propane heat"

If your using a Salamander style propane heater it is likely a major part of the moisture problem. In any enclosed space the combustion gasses must be vented to the exterior. One of the major byproducts of combustion is water vapor.