Bill;

I say 12 hours on the formic boards but I think it is more like 4 hours
before the fumes disperse.  They call them 'flash boards' for a reason as
the formic leaves the boards quickly.  I think I could use the boards twice
in 1 day, morning and evening if I wanted.  Just my field observation after
4 years of use.

Peter, barn roofs, eh?  I was worried about the barn roof too so I
reinforced the rafters and put cross braces inside the barn.  Then I saw 2
feet of snow on the roof for several winters and realized it was heavier
than the bees and honey so I must be a good 'jack-leg' structural engineer
or just lucky.

And Aaron, thanks for correcting my url to the barn roof photo - my first
try linking a photo with that program.

Bill Lord
beekeepingconsultingfordevelopment.com

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