If you drill holes, the holes will not be galvanised, of course, and will
start to rust. I've used cold galvanizing spray coating, from Brafasco, to
great success in rust-proofing parts. The other thought is to create a
vapour barrier inside the insulation, so that the condensation, if any, is
on the inner surface of the door. Perhaps vinyl vapour barrier material
would do, on the inside surface of the insulation.
brian
At 11:02 AM 12/17/99 -0500, Derek Harling wrote:
>My "Race Shop" in my new home is the usual 20x20 domestic garage
>dedicated to race cars and equipment [no dirty street cars allowed
>inside!].
>
>The door is a modern, painted, galvanised steel, sectional lift up -
>insulated with vinyl faced polystyrene foam blocks.
>
>On the few occasions I've open the big door in the past few months I've
>experienced considerable water running out - at the most inconvenient
>times and in the most inconvenient places - of course! At first I
>thought it was rain water collecting in the space between panels but it
>turns out to be condensation on the inside of the steel panels - [the
>cold side of the insulation]. The water collects in the channel at the
>bottom and empties itself when the door section goes up and over.
>
>Any suggestions to stop it or to alleviate the problem?
>
>What about some small drainage holes - if the steel is galvanised I
>shouldn't have a rust problem - right?
>
>Does anyone else have this problem?
>
>I live in the Detroit area so we have 3-4 months of winter. Maybe it
>will get better as we get the colder, drier air in winter?
>
>What say the experts?
>
>Derek
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