ash_hammond
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| posted on 24/12/13 at 05:39 PM |
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Have I caused condensation?
Have a double garage which is concrete sectional and has a congregated roof. A few weeks back i decided in my wisdom to plug the little gaps between
the roof and the walls with a little loft insulation. Hoping this would cut down drafts etc.... I'm a warm weather tinkera! 
The garage only gets opened once or twice per week as its not at my house.
I noticed on Friday that my big metal tool box was slightly damp on the surface with condensation. The garage roof does not leak.
Thinking about it i have probably caused the issue by not allowing the garage to "Breathe".
Am I barking up the right tree?
If so what are my options:
Remove the insulation
or
Fit some vents
Extractor fan
Open to ideas.
- Ash
.: www.mac1motorsports.co.uk | www.m1moc.com :.
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steve m
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| posted on 24/12/13 at 05:44 PM |
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It does look that way, so I would remove some of the insulation, plus as its not that cold yet, anyway
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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snapper
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| posted on 24/12/13 at 07:33 PM |
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Condensation in house lofts is often caused by blocking vents in the eave so unblock the garage roof and build a sub roof and insulate that
So air still flows under the corrugated
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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Nickp
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| posted on 24/12/13 at 08:43 PM |
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My 'tin' roof is boarded out with insulation in the gap but I also have an extractor fan on a timer. It comes on for 15mins every 2hrs and
seems to keep it all nice and dry
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JoelP
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| posted on 24/12/13 at 10:14 PM |
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Am extractor fan would waste more energy than the insulation would save. A garage isn't like a house, there are fewer sources of damp so they
need less ventilation. There's no one breathing, having showers, drying clothes etc. Id leave the insulation in so there are no drafts when
you're in there, but have a vent to keep it aired when you aren't there.
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MP3C
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| posted on 25/12/13 at 12:58 PM |
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quote:
Originally posted by snapper
Condensation in house lofts is often caused by blocking vents in the eave so unblock the garage roof and build a sub roof and insulate that
So air still flows under the corrugated
He will need ventilation in the whole garage as essentially the garage is the roof space, as the internal temperature will be pretty cold also due to
(presumably) no heating the cold objects in the garage are attracting the moisture.
To answer your question, yes you have caused the condensation  you could fit some vents, however you have perfectly good "vents" that
you have blocked up  so would probably be best to remove the insulation and spend the money on a small heater for the garage to warm you up while
you work.
Matt
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Canada EH!
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| posted on 25/12/13 at 05:33 PM |
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We park our snow covered cars in a two car garage which is not heated except for what leaks from the back wall of the house and the bedrooms above.
Once the winter has settled in like now -24 c last night, the garage gets very damp. The garage is at +4 C right now.
We use a de-humidifier which handles the job quite well, takes about a gallon of water out of the air in a week.
Plus we squeegee the floor at the same time we empty the de-humidifier.
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coyoteboy
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| posted on 25/12/13 at 06:53 PM |
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I have the same type of garage with no insulation and loads of drafts and it still has huge condensation problems. It's just what happens when
you have warm moist air blowing into a garage full of cold metal objects from the nights chill. No amount of ventilation will help that, you just
have to make sure you keep the whole lot above the dew point.
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ash_hammond
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| posted on 27/12/13 at 10:07 AM |
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Sorry about not replying... that thing called Christmas got in the way!
I can never remember the garage having condensation in the past, but i never really used it that much.
I'm only there at weekends so most of the time there is no ventilation from open doors etc.
There are two main areas that have been blocked - under the eaves and where the two roof panels meet in the middle.
I think the simplest solution is to remove the insulation in the top of the roof and see if the issue gets better.
I have thought about a small delonghi storage heater, but given its a double garage i did not think it would have any effect. I don't mind
paying for the electric if its going to help the problem.
I have just purchased a hydro meter off fleabay so i can keep and eye on the problem and accurately measure it and see what changes make the most
difference.
Thanks
Ash
.: www.mac1motorsports.co.uk | www.m1moc.com :.
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