>>Can anyone offere tips about how to deal with things like the 
stripping of the old shingles and installation of the new ones around 
the bees?

I'd attach a tarp just under the garage roof and suspend it over the 
hives.  The workers should be able to strip the roof and take the 
tarp down in the evening.

Typical bees should not fly up over the tarp and go after the roofers 
if the hives are not hit with debris.

Waldemar

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