Order by 2pm for next working day delivery 
1st Class Customer Service 
12 Month Guarantee 
Konigin Lid Safety Switch
24th September 2024
6 Frame Dual Poly Nuc 14 x 12 Extension Eke
27th September 2024
6 Frame Dual Poly Nuc Brood Box
£29.99
Additional EPP brood box for the 6 Frame Dual Poly Nuc system — the modular way to scale up with an established colony as the season progresses. Expand your existing setup without replacing it. Designed to fit seamlessly with the core nuc platform.
OFFER: Buy 2 brood extensions and get a FREE eke extension
In stock
Tier 2 · Expansion
Scale up with your bees
Additional brood space for thriving, established colonies. The modular way to give your bees more room as the season progresses — without transferring to a new box or disrupting the colony. Made from the same ultralight, waterproof EPP material as the core nuc.
Modular Expansion System
Add brood space as you need it
The Brood Box Extension gives you an additional 6-frame brood chamber that stacks seamlessly with your existing poly nuc. Perfect for mid-season expansion when your colony is building fast and needs more laying space.
Doubles Your Brood Capacity
Stack the extension on top of your existing brood box to create a double-brood nuc — giving the queen twice the laying space without changing boxes.
Keep the Colony Together
No need to transfer frames to a new box or split the colony. Just stack the extension and let the queen expand naturally into the new space.
Mid-Season Upsell
Ideal timing is late spring through summer when colonies are at peak expansion. Add the brood box extension proactively before congestion becomes swarming pressure.
Works with or without the Eke
Stack it on a standard nuc or on a 14×12 configuration — the brood box extension fits either way, giving you complete flexibility.
Preventing Congestion
When your colony outgrows the nuc
As colonies build up through late spring and summer, brood congestion becomes a risk. Adding a second brood box gives your bees the space they need before swarming pressure forces your hand.
Control Swarming Pressure
A congested brood nest is one of the main triggers for swarming. More laying space means less pressure — and less likelihood of your colony splitting before you’re ready.
Maximise Honey Production
A large, thriving brood nest means more foragers. More foragers means more nectar. Double brood gives you the colony strength needed for a serious honey crop.
Removable and Reusable
If you need to downsize for winter or split the colony later, simply remove the extension. Fully modular — use it when you need it, store it when you don’t.
Same EPP Material
All the benefits of EPP
The brood box extension is manufactured from the same Expanded Polypropylene as the core nuc — meaning it’s ultralight, waterproof, impact-resistant, and never needs painting.
No Painting Required
EPP’s UV-stable neutral colour is permanent. Simply wipe clean each season — no brushes, no prep, no maintenance.
Superior Insulation
EPP’s thermal properties keep colonies warmer in winter and cooler in summer — maintaining optimal brood conditions year-round.
Ultralight
EPP is one of the lightest hive materials available — even a fully loaded double-brood nuc remains easy to lift and transport.
Technical Specifications
Full product specifications
| Product Type | Brood Box Extension |
| Compatibility | 6 Frame Dual Poly Nuc (stacks on top of existing brood box) |
| Frame Standard | British National |
| Frame Capacity | 6 frames (or 2 × 3 frames when split) |
| Material | Expanded Polypropylene (EPP) — NOT Expanded Polystyrene (EPS) |
| Installation | Stacks on top of existing brood box |
| Floor Type | Brood box only — no integrated floor (stacks on existing nuc base) |
| Divider Compatibility | Works with standard Correx divider or aluminium composite divider (sold separately) |
| UV Filter | Built in — colour is permanent, no painting required |
| Painting Required | No |
| Waterproof | Yes — EPP has zero water absorption |
| Recyclable | Yes — 100% EPP, fully reprocessable |
| Availability | Exclusively from Old Castle Farm Hives |
Expand Your Setup
The complete Poly Nuc range
Every product in the range is designed to work seamlessly with your 6 Frame Dual Poly Nuc. Build the exact setup your apiary needs — from a second complete box to individual replacement parts.
Standard · £54.99
6 Frame Dual Poly Nuc — Standard
The hero product. Full 6-frame British National nuc with 3.5L feeder, Correx divider, mesh floor, lid, and 2× entrance discs. Complete kit — nothing extra to buy.
14×12 Version
6 Frame Dual Poly Nuc — 14×12
The standard nuc with the 14×12 eke extension pre-installed — full 14×12 brood depth straight out of the box. Ideal for beekeepers who run exclusively 14×12.
Expansion
14×12 Eke Extension
Converts your standard poly nuc to full 14×12 brood depth — giving a growing colony more space without buying a new box. Fits between brood box and feeder.
Expansion
Brood Box Extension
Additional brood space for thriving, established colonies. The modular way to scale up with your bees as the season progresses — expand, don’t replace.
Transport
Vented Transport Lid
Purpose-designed ventilated lid that fits the 6 Frame Dual Poly Nuc precisely. Keeps bees safe, calm, and ventilated during transport.
Transport
Mesh Transport Bag
Cordstring mesh bag for safe transport of the poly nuc. Additional security and ventilation when moving colonies — particularly useful at shows and collection points.
Upgrade
Aluminium Composite Divider
Upgrade from the standard Correx divider to a precision-cut aluminium composite version — maximum durability and years of repeated use. Fits without modification.
Upgrade
Stainless Steel Entrance Discs (125mm)
Premium corrosion-proof stainless steel alternative to the standard plastic entrance discs. 125mm — purpose-sized for the OCF entrance housing. A one-time buy that outlasts the hive.
Tier 5 — Spare Parts
Keep every nuc in service
Nothing ever needs replacing wholesale. Individual spare parts mean a single worn or damaged component is a quick, cheap fix — not an excuse to buy a whole new box.
| Part | Description | Link |
|---|---|---|
| Replacement Feeder (3.5L) | Top feeder — liquid syrup or fondant/pattie. | View → |
| Replacement Lid | Standard lid with hive strap recess. | View → |
| Replacement Correx Divider (Standard) | Standard-depth Correx dividing board. Colour may vary. | View → |
| Replacement Correx Divider (14×12) | 14×12 depth Correx divider for use with the eke extension. | View → |
| Spare Perspex Feeder Panels (×2) | Replacement Perspex panels for the 3.5L top feeder. | View → |
| Spare Silicone Bung (Feeder) | Replacement silicone bung for the feeder hole. Apply petroleum jelly and twist firmly for a leak-free seal. | View → |
| Plastic Entrance Discs (125mm) | Standard plastic hive entrance discs — 125mm. | View → |
| Stainless Steel Entrance Discs (125mm) | Premium corrosion-proof stainless alternative — 125mm. | View → |
Scale up with your bees — expand, don’t replace
Modular brood expansion. Doubles your brood capacity. EPP construction. No painting required. Exclusively designed and available only from Old Castle Farm Hives.
Add to Basket
| Weight | 3.002 kg |
|---|---|
| Product type | Add-ons |
You may also like…
6 Frame Dual Poly Nuc
£54.99
