Plastic Foundation – BS National Deep – Black/Yellow

BSBritish Standard — National deep brood2Colours: Black or YellowBroodFor National DN4 brood frames Tier 3 — Frames & FoundationPlastic deep foundation. Black or Yellow.British Standard plastic foundation for National deep brood frames. Rigid, durable, and reusable year after year. Available in black for high-contrast inspection of eggs and young larvae, or yellow for a natural beeswax appearance. Fits all standard DN4 Hoffman brood frames. Rigid plastic — reusable season after seasonUnlike wax foundation, plastic doesn’t sag, tear, or need replacing each year. Clean it, re-coat with beeswax, and reuse. Long-term value for beekeepers running multiple hives. Black or Yellow — choose your preferenceBlack foundation makes the queen’s white eggs far easier to spot against the dark background — a real advantage during queen checks. Yellow matches the appearance of natural drawn comb. Select at checkout. Important — coat with molten wax before use: Plastic foundation requires a thin coating of molten beeswax applied to both sides before placing in the hive. Without it, bees are reluctant to draw comb on the plastic surface. One simple step makes all the difference. Product SpecificationsWhat you need to knowTypePlastic BS National Deep (Brood) FoundationStandardBritish Standard National — deep brood depthCompatible framesDN4 Hoffman brood framesColoursBlack or Yellow (select at checkout)WireNone — rigid plastic sheetReusableYes — clean, re-coat with beeswax, and reuseGuarantee12 months Western Red Cedar National Hive RangeEverything you need, one rangeEvery component in our Western Red Cedar National Hive range is designed to work together. From complete hive kits to individual boxes, frames, foundation, and essential accessories — all available from Old Castle Farm Hives. Tier 1Complete Hive Kits Complete Kit – AssembledNational Hive Complete (Assembled) View product → Complete Kit – Flat PackNational Hive Complete (Flat Pack) View product → 14×12 Complete – AssembledNational Hive 14×12 (Assembled) View product → 14×12 Complete – Flat PackNational Hive 14×12 (Flat Pack) View product → Tier 2Individual Boxes & Components Brood BoxNational Brood Box View product → 14×12 Brood Box14×12 Deep Brood Box View product → Super BoxNational Super Box View product → Mesh FloorOpen Mesh Floor (Complete) View product → Tier 3Frames & Foundation Brood FramesDN4 Brood Frames (Hoffman) View product → Super FramesSN4 Super Frames (Hoffman) View product → Brood FoundationWired Deep (Brood) Foundation View product → Super FoundationWired Shallow (Super) Foundation View product → Tier 4Essential AccessoriesAccessoryDescriptionLinkWood & Wire Queen ExcluderTraditional wood-framed wire queen excluder. Available in packs of 1, 5, 10, or 20.View →Plastic Queen Excluder (460mm × 460mm)Lightweight plastic queen excluder for National hives.View →Plastic Queen Excluder (500mm × 500mm)Larger plastic queen excluder for extended hive formats.View →Entrance BlockWooden entrance reducer for controlling hive access and ventilation.View →Foam National Hive Entrance BlockerFoam entrance seal for secure hive closure during transport or treatment.View →Universal Mouse Guard (315mm)Metal mouse guard for winter protection. 315mm width.View →Universal Mouse Guard (450mm)Wider variant for larger entrances. 450mm width.View →Stainless Steel Mouse GuardPremium stainless steel mouse guard for long-lasting protection.View →National Hive StandSturdy wooden hive stand for elevating your National hive.View →Metal Frame RunnersReplacement metal runners for National brood and super boxes.View →Metal Castellations (10 or 11 spaces)Metal frame spacing guides for precise Hoffman frame positioning.View →Frame PerchConvenient frame rest for inspections and frame handling.View →Queen Tracking PinsColour-coded pins for marking queen location and tracking colony status.View →Hive Connectors (Stainless Steel)Secure stainless steel connectors for joining hive boxes.View →Adjustable Hive ConnectorsAdjustable catch connectors for securing wooden hive components.View →Heavy Duty Beehive HandlesRobust metal handles for easier hive box lifting and transportation.View →Hive Corners (Set of 4)Protective metal corner brackets for reinforcing hive boxes.View →Varroa MeshReplacement varroa monitoring mesh for open mesh floors.View →Plastic Varroa Mesh (500mm × 500mm)Durable plastic varroa mesh roll for custom floor construction.View →Oxalic Acid Granules (500g Tub)Highly effective wood bleach for removing black water stains, tannin spots, and rust marks from bare cedar.View →Bee EscapesBrowse our full range of bee escape boards and clearing devices.View →