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Top Bar Hive ventilation

 
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charentejohn
Foraging Bee


Joined: 26 May 2012
Posts: 100
Location: Central France - Charente

PostPosted: Sat Jul 16, 2016 12:39 pm    Post subject: Top Bar Hive ventilation Reply with quote

Lots on ventilation but I would like to know if this sounds good or bad ?
I am moving bees into a TBH and won't be disturbing them unless necessary. So no opening the lid on hot days etc.
Bottom of the hive is sealed, not mesh as some plans said, with some small gaps. This is not a perfect fit but solidly attached.

The entrance is low front and 9mm high 15cm long slot, so about 13 sq cm.
The slats have some small gaps, less than 1mm which I guess they will block if they feel the need.

I was wondering whether to put a 2mm dia hole near the top on one side to allow air to circulate. I would cover this with fine steel mesh so they can seal it if they like, and I assume open it if needs be.

Just sorting out some minor changes to top bars so now is a good time to do it.
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Adriaan
Guard Bee


Joined: 18 Jan 2016
Posts: 95
Location: central Belgium

PostPosted: Sun Jul 17, 2016 6:06 am    Post subject: Reply with quote

You mean ' a two cm hole'? seems OK to me.

friendly greetings

Adriaan
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Barbara
Site Admin


Joined: 27 Jul 2011
Posts: 1581
Location: England/Co.Durham/Ebchester

PostPosted: Sun Jul 17, 2016 11:39 am    Post subject: Reply with quote

Many of us now feel that ventilation is not required or even a good thing. The logic behind this is that hollow tree cavities do not usually have upper ventilation, but rather insulation in the form of a great bulk of timber. In "Natural" beekeeping we are trying to mimic the natural environment of the bees as much as possible and so, we are now looking towards insulating the hive summer and winter and leaving the bees to work at heating or cooling as they see fit.

If you really feel it ventilation may be beneficial, one 2mm hole will achieve very little, but several 2 mm holes would provide that option but still be small enough for the bees to seal them up with propolis if they didn't want them and too small for wasps to get in without the need for mesh..
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charentejohn
Foraging Bee


Joined: 26 May 2012
Posts: 100
Location: Central France - Charente

PostPosted: Sun Jul 17, 2016 10:11 pm    Post subject: Reply with quote

Thanks, I will drill a few 2mm holes near the top on the 'can't do any harm' basis.
They will have small 1mm or less gaps between the bars which they may seal but will provide ventilation if they want it. I do believe they are best left to their own devices, just offering them options where I can.
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