4 cm EKE FRAME | 3 cm USABLE INNER GAP |
Hardboard crown board with a 4 cm pine eke and a central vent: it lifts the roof and leaves room to feed.
It works as an ordinary crown board and, on top of that, as a spacer: the perimeter frame leaves 3 cm of clearance between the top bars and the outer roof — exactly the room a syrup bag or a crown board feeder needs.
01 · THE PROBLEM IT SOLVES
If your hive runs a shallow outer roof — flat metal ones and budget covers — putting a syrup bag over the frames leaves the roof sitting proud. And that is where the same three problems start: water gets in, robbing gets in, and bees get crushed on closing. This crown board lifts the roof by 3 cm and gives you the room for emergency feeding, winter candy, a syrup bag or an inverted rigid feeder.
02 · THE VENT
It has a plastic disc with a grille and a tab built into the centre. It ventilates on short moves or hot days without letting bees out, and it works as a port for fitting a rapid feeder right over the hole. If you would rather keep it shut in winter, laying the bag or the feeder on top blocks it — no extra parts.
03 · WHICH SIZE?
| 510 × 425 mm | Langstroth and Dadant US. One size serves both formats, and it is the common one in Spain. |
|---|---|
| 500 × 425 mm | Dadant Blatt, the French size. One centimetre shorter; get it wrong and it rattles on the box. |
04 · BEFORE YOU BUY
Hardboard base — a smooth surface, so they do not propolise gaps — and a solid pine frame jointed on all four corners, which is the part that takes the weight of a loaded roof and the leverage of the hive tool prising it off the propolis.
| ✓ FITS | Langstroth and Dadant US (510 × 425 mm) or Dadant Blatt (500 × 425 mm), by version. |
| ⚠ NOT INCLUDED | Feeder or syrup bag: the crown board makes the room, the feed is separate. |
| Base | Hardboard |
|---|---|
| Frame | Solid pine, 4 cm high, jointed on four corners |
| Usable inner gap | 3 cm above the top bars |
| Vent | Plastic disc with grille and tab, centrally placed |
| Outer dimensions | 510 × 425 mm (Langstroth and Dadant US) · 500 × 425 mm (Dadant Blatt) |
Data sheet

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