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Corrugated Garage Roof
Darren:
Well David, that de-bunks the ventilation theory ...
I did wonder that whilst the ventilation may remove water logged air, it might also bring in new damp air ...
andyf:
There seems no logic to the condensation question. I have a brick garage with a tiled roof, built in the 1930s so there probably isn't a membrane below the concrete floor. There are two airbricks in the walls, and plenty of leakage round the main doors and side "courtesy door".
In the 35 years I have lived here, I have never had a problem with condensation, or with unprotected items rusting unduly. Three years ago, I screwed a chipboard ceiling up to the roof joists, with insulation on top, and built internal stud and chipboard walls, again with insulation behind, a couple of inches in from the brickwork to leave a gap for air to circulate behind via the airbricks and the gaps round the main door. I worried that sealing up my working space like this might promote condensation but there still isn't any, even though it's pretty humid round here with frequent heavy dew overnight and a fairly high water table.
Andy
CrewCab:
--- Quote from: andyf on December 14, 2009, 02:18:28 AM ---There seems no logic to the condensation question.
--- End quote ---
It's a case of getting the balance between insulation and ventilation right ............ and as you say "no logic" is involved afaik ........... it's a bit of trial and error I'm afraid ::)
CC
Darren:
Now that I have stuck a heater on all my condensation problems have disapeared.
I'm using the lowest setting on the heater which is 400W which is also controlled with a thermostat to 12deg. Where I like it :)
I have tonight put a meter on it to monitor the electrical usage .... will report in due course, but it's unlikely to be much due to the insulation measures.
"Snug as a Bug"
Darren
Divided he ad:
Quick searched science lesson..... :smart:
http://en.wikipedia.org/wiki/Condensation
Read at least this paragraph and I think we're all better of in the knowledge stakes!?
--- Quote ---Water vapor that naturally condenses on cold surfaces into liquid water is called dew. Water vapor will normally only condense onto another surface when the temperature of that surface is cooler than the temperature of the water vapor.
--- End quote ---
Just thought a bit of knowledge could go a long way into understanding your issues Kevin.... Oh hi BTW :wave:
Ralph.
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