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Rational Roof

3rd Angle
The Grain should run along the longest dimension of any part.

Cutting of parts (all dimensions in mm).

QtyLengthWidth ThicknessMaterialUsage
1460460 9Exterior PlywoodLower Panel
1460460 4Exterior Ply or HardboardTop Panel
2460 5018PineLong sides of rim
2436 5018PineOther rim parts
1461461 10Spangled GalvanisedSheet Metal Cover
1424424 50Expanded Polystyrene FoamInsulation

Rational Roof
If you wish to use this item in a system that uses bottom bee space, then add the Rim Parts.

Use without the rim if top bee space is required.

Note 1.
9 mm plywood is specified for the lower surface owing to it's greater rigidity and freedom from warping. This durability outweighs the small cost saving of using thinner material.

Assemble using a waterproof PVA type glue using nails or screws.

The version as drawn above is simple to make and very durable. If petroleum jelly is used on the on the main panel and linseed oil or outdoor enamel paint is used on the outer edges, the item will give many years of good service.


The roof is fitted to the top of the hive using "Z" springs to hold it firmly in place.

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Revised... 14 August 2001, 23 May 2002