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16th May 2010, 10:55 AM #1
shed Upgrades wood heater & bitumen black
Hi all,
After too many cold cold winters in the shed where temps can reach a balmy 4c at midday i finally bought myself a wood heater. Its a 44 gallon drum on its side with a professional door kit fitted into what was the base. I've placed it well away from anything that makes sawdust & my dust extractor will soon go into a small shed outside. I've had it fired up once so far & it really puts out the heat well & can take some good size pieces of wood.
Now to the next job today; painting all the steel C-section rafters with a brush on bitumen. Thru the winter i have a really bad problem with condensation on the rafters. Whenever we get a frost thru the night condensation gathers on the rafters then freezes. When the sun comes up it thaws & i get a mini rain in the shed - all over my cast iron machinery & any projects i happen to be working on. This only happens when we have a frost but never when it rains so i'm pretty sure its not a leak in the roof. Up to now i've had to cover everything with tarps, which works but is a pain in the butt plus there's always something that gets missed with a tarp that somehow is also under a rafter.
Pics 2 & 3 shows the water stains left from many years of water droplets. Lets just hope that the pain on bitumen will do the job!
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16th May 2010, 11:51 AM #2
Love the couch next to the firebox. With 4 degrees C at midday, brrrrrrrrrrrrrrrrrr. I agree - mini-rain inside the shed is Not fun!
Why did you choose the brush on bitumen? I've never heard of that before.Box Challenge 2011 - Check out the amazing Boxes!
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16th May 2010, 01:50 PM #3
RR i chose the paint on bitumen mostly because of recommendations from several people. The black stuff is specifically designed to go onto steel so theres no need to prime the surface or anything else. Also Tar doesn't freeze to therefore - hopefully - neither will any moisture on the rafters.
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16th May 2010, 05:52 PM #4
Ah Ha! Thanks Rattrap. I will be very interested to see how it works for you.
cheers
WendyBox Challenge 2011 - Check out the amazing Boxes!
Twist One - Wooden Hinge/Latch/Catch/Handle
Twist Two - Found Object
Twist Three - Anything Goes
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16th May 2010, 06:16 PM #5
well job is done & i think we are due for a frost tonight by the look of the sky so tomorrow will tell.
If it doesn't work the next move will be a full false ceiling. At $40 for bitumen black & a brush plus half a days labor was worth a try for sure.
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17th May 2010, 11:30 PM #6Novice
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rat im a ranbuild installer in western australia so not as cold as tasmania but down here in pemberton it does get a bit chilly. anyway being a full time shed erector and carpenter ive got to ask do you have a membrane under your roof sheets as that will make a difference ,i think its to do with temperature differential .also the membrane actes as run off and discharges the condensation down hill as it were ,if you do have it im a bit confused as to why it drips off your rafter but not your sheets.for a membrane you can use sisalation commonly called paper here or aircell /insulbreak a bit dearer but very effective it would mean ripping your roof off but better that than damaging a beautiful piece of furniture anyway hope this helps no problem if it doesnt cheers steve
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18th May 2010, 09:54 AM #7
Steve yer my shed has sisalation installed & the tar idea didn't work. big fat drips this morning.
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18th May 2010, 12:59 PM #8
I'm intrigued by this as I'm in Melbourne, and have had sisilation in both my sheds with no drips, whereas the pergolas and carports without it, drip like crazy.
Is your shed fully enclosed? I notice the large opening to the left of the fireplace, does that have a door?Too many projects, so little time, even less money!Are you a registered member? Why not? click here to register. It's free and only takes 37 seconds! Doing work around the home? Wander over to our sister site, Renovate Forum, for all your renovation queries.
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18th May 2010, 04:02 PM #9
Hi Yonnee, my shed is fully enclosed.
It has 2 roller doors in one long side & a standard door in 1 of the ends. It also has 4 'clear' fiberglass panels in the roof. There is however quite a gap between the top of the roller door & the top of the roller doorway - horizontally not vertically. The shed is all steel with a concrete floor & is 6m x 15m i think. . As i mentioned earlier it has full sisilation over the entire roof except where the skylight panels are. The sisilation is sandwiched between the roof iron & the C section trusses with box wiring holding the sisilation in place across the entire roof. I had to cut thru some of the sisilation to install the woodheater & it looked like 2 sheets of alfoil sandwiching a thin layer of tar.
The shed doesn't leak at all when its raining, only when its fine & we have a frost & then pretty much along the entire length of the rafters.
I'm hoping that once i get busier in the shed the wood heater will keep enough warmth thru the night to ease the problem. In the meantime its tarps over everything.
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18th May 2010, 08:46 PM #10Novice
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very confusing will ask around
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19th May 2010, 12:06 AM #11
Rattrap,
I have foil backed wool insulation on my roof and the roof is at a 22 degree pitch and no problems so far.
I am guessing that we have a similar climate to you, lots of frosts and snow during winter.
Is it possible that the clear panels are the source of the problem?
It must be extremely disappointing having to tarp everything every cold night.- Wood Borer
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19th May 2010, 12:11 AM #12Novice
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as mentioned before im a shed builder and skylight panels have heavy condensation more so than zincalume sheeting are your skylights near the rafter?
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19th May 2010, 12:17 AM #13
I had a strip of skylight in my first shed, and it was the only place it dripped. Current shed, no skylight, no drips.
Too many projects, so little time, even less money!Are you a registered member? Why not? click here to register. It's free and only takes 37 seconds! Doing work around the home? Wander over to our sister site, Renovate Forum, for all your renovation queries.
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19th May 2010, 12:21 AM #14
Oh, and I love the heater. Did you buy it or build it? I might just have to "borrow" that idea... I have a couple of 44's lying around.
Too many projects, so little time, even less money!Are you a registered member? Why not? click here to register. It's free and only takes 37 seconds! Doing work around the home? Wander over to our sister site, Renovate Forum, for all your renovation queries.
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19th May 2010, 01:14 AM #15
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