@Crysalismum
There wouuldn't be so many members here not familiar with temps above 35C, the
working broodnest temp of a strong colony, and atmospheric temps getting well
beyond that for at least a few days every year. Tonight's ABC news bringing a record
48C for NorWest NSW today.
Sisalation[R) aka roof sarking is not insulation, it is a dewpoint focusing medium,
entirely ineffective on hot dry days - a sheet of gal.Iron thrown over the hive would
be way more effective, yet still not enough if the internal space was getting extreme,
which it isn't. Your pix shows clumping of bees with nothing to do (unemployed).
Attached (hopefully) is a hive in stress from overheating, a distinctly different pattern
and in video mode would also show an extra amount of bees in flight.
A simple roof sized block of 50mm EPS sat on top would give sufficient R:value to put
an end to the woes of the bees in the attached.
For yours it as Jim suggests, give them something to do. Before adding frames though
check the broodchamber is not backfilled with honey - the most likeky cause for the
clumping you see.
To rectify that shuffle some of the stores frames up into a FD super on top of the BC
and replace them with either drawn comb or new frames. Don't go interfering with the
broodnest itself (frms#4+#5+#6+#7).
If you like also apply the Irish fix and throw a sheet of gal.Iron on top. :-)
Cheers.
Bill
PS; Also attached is our Standard for Lang stacks.
Migratory lid packed with 50mm EPS.
Vented supers at 55mm (screened) - only the uppermost
super is open, the remainder blanked off.
All bottomboards are solid with full width entrances.
Suits all conditions regardless of ambient temp/rH.
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