The best poly hive ?

[user 6228]

Look out for thin spots around hand holds, some are only a few mm thick there and consequently lose heat there

 

[Hivemaker.]

Look out for thin spots around hand holds, some are only a few mm thick there and consequently lose heat there

Derek, what would you recommend as the best material to fill in these hand holds to reduce heat loss.

Woodpeckers also seem to choose these handholds to make their holes.

 

[Finman]

Derek, what would you recommend as the best material to fill in these hand holds to reduce heat loss.

Woodpeckers also seem to choose these handholds to make their holes.

long and

They ARE really not needed to fill.
In old models half of Wall was thinned and that insulation is really enough in Scandinavian hard and long Winter.

We have here 25 years experience with thousands of hives, and One guy there act like expert. Really awfull.

And I have said many Times that you ruin insulation properties with keeping mesh floor open....and with those vain feeding holes and fondants.

 

[Finman]

Look out for thin spots around hand holds, some are only a few mm thick there and consequently lose heat there

As far as I know, those thin points are 20 mm thick. And 20 mm polystyrene is very good insulation.
It is as good as 20 cm Wood.

 

[Hivemaker.]

Thank you Finman, no need to fill in the hand holds, the heat loss won't be too great.

I don't use mesh floors, do you think that those that do, lose a lot of heat?

 

[Finman]

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What is A good polyhive for long distance.

My opinion after 27 y usage is that material is tough.
There is a difference between boxes, even between same company.

I have noticed it too, how happily wax mot larva goes through the boxes.

In One case bees chewed the box through in One month.
In Another Cases 25 y old boxes are as good as new.
Important is that box has no extra holes. They ARE a nuisance.

But it is difficult to beginner to see what the material is.

Bees tend to chew entrances bigger.
But it is easy TO repair broken Points with polyurethane glue.

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[Finman]

I don't use mesh floors, do you think that those that do, lose a lot of heat?

You know it better according your experiment. The wind is very bad. That is why many use extra empty box under wintering box.

 

[itma]

as the title , who sell's the best poly national for the money .......

Amazing that poly *Nationals* should have been in use overseas for so long before they appeared over here ...



I wonder if Derek could tell us which brand of *National* he was referring to, with the thin walls at the handhold?

 

[Erichalfbee]

Thank you Finman, no need to fill in the hand holds, the heat loss won't be too great.

I don't use mesh floors, do you think that those that do, lose a lot of heat?

This year I have closed off my mesh floors apart from a 3" circle in the middle.
There is condensation on neither the insert nor the insulated clear crown board.
In the three ploys the cluster is in the middle of the box, in the wooden hive it's at the top.

 

[jenkinsbrynmair]

I don't close my OMF's until there's at least 5mm of snow on the floor and temps set to go below 5°

 

[victor meldrew]

I don't close my OMF's until there's at least 5mm of snow on the floor and temps set to go below 5°

A little punctilious ?
Too much time on your hands ?
VM


Sent from my iPad using Tapatalk

 

[user 6228]

Thank you Finman, no need to fill in the hand holds, the heat loss won't be too great.

?

not according to the IR thermographs. the hand holds are near the top on some models they are very extensive.

you also need to look at the thickness at the frame rails. Some model are very thin there.

 

[user 6228]

As far as I know, those thin points are 20 mm thick. And 20 mm polystyrene is very good insulation.
It is as good as 20 cm Wood.

No thats way off

lambda
polystyrene 0.03 to 0.04
cedar 0.01 (not dried)
oak 1.8 (not dried)

20mm poly is 40mm to 60mm cedar or 80mm to 120mm oak

 

[herefordshirehoney]

Swienty langstroth I'm biased though as that's why I have but based on my research seemed best of the picks as compatible with wood langstroth kit.

 

[user 6228]

Amazing that poly *Nationals* should have been in use overseas for so long before they appeared over here ...



I wonder if Derek could tell us which brand of *National* he was referring to, with the thin walls at the handhold?

no not this moment, its in a report I have yet to publish.

 

[Finman]

No thats way off

lambda
polystyrene 0.03 to 0.04
cedar 0.01 (not dried)
oak 1.8 (not dried)

20mm poly is 40mm to 60mm cedar or 80mm to 120mm oak

Thermal rating (R-value)

The R-value is used to measure how well a material resists the flow of heat through it.

Northern White Cedar has an R-value of 1.41 per inch of thickness,

Pine species used in log home construction have an average R-value of 1.25 per inch of thickness.(4)

.http://www.katahdincedarloghomes.com/thekatahdindifference_cedarvspine.cfm



Plywood R-value .... 1" ..... 1.25

Expanded Polystyrene (Extruded-..... 1" ......5.00
Expand...........................................1.5"...(38 mm).....7.50
Polyurethane Foam (Foamed on site).... 1" .... 6.25


Insulation value depends on the size of polystyrene air bubbles. The smaller, the better.

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[user 6228]

Thermal rating (R-value)

The R-value is used to measure how well a material resists the flow of heat through it.
Northern White Cedar has an R-value of 1.41 per inch of thickness,


Pine species used in log home construction have an average R-value of 1.25 per inch of thickness.(4)

R value is thermal resistance in imperial units.

Lambda is conductivity in SI units. often referred to as K in the Fourier conduction equation e.g. K=-q/(dT/dx)

I havent bothered with imperial units in all the time I started dealing with heat (~45 years)

 

[Finman]

R
I havent bothered with imperial units in all the time I started dealing with heat (~45 years)

Like your mole thing....

Don't bother. I can read google.

I started deal with cold 64 years ago when I started to keep rubber boots in winter in -20C snow.

Kidding, we usually weared sheep wollen felt boots in that temp

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