hesterd

What were all the panels feeding? Were there several units? Also technically those are garages. Three walls equal a garage.

I sometimes see this on a north side only. I am in a dry climate and from what I am seeing is this happens during certain conditions where there exterior humidity shoots up and the roof is still cold causing condensation. Typically this is an early spring late winter event. The moisture is actually coming from the exterior of the home. Not knowing that this case here, but thought I would throw this out for food for thought if you are in an area like Eastern Washington.

I had one of these (damper control) on an old wood burning furnace.

Really they should require that all attics have a rat walk if the attic has a hatch for inspection and servicing. But that said how many will trample untouched insulation if that is the only option to traverse the attic?

Here is a site gives you some ideas on the retrofit. There are various anchoring solutions. http://www.earthquakesafety.com/earthqu ... tting.html