Wooden greenhouses, built for British weather.

No greenhouse is guaranteed against every weather event. NORDIC uses a 45 × 45 mm pine frame with 1.2 mm galvanised steel angle brackets at every node, screw-fixed 4 or 6 mm twin-wall polycarbonate and included ground anchors.

Damage from named storm events or other extreme weather is excluded. The product warranty is: 10-year anti-rot frame warranty (conditional on re-treating timber with any UK-purchased wood preservative every 2 years) + 2-year polycarbonate panel warranty (manufacturer defects). See our warranty page for the full terms. For coastal, upland or otherwise exposed plots, email us before ordering.

Most owners build over one weekend. Realistic times, working at a comfortable pace with breaks:

NORDIC-S 8–12 h · NORDIC-M 10–14 h · NORDIC-L 12–16 h · NORDIC-XL 14–18 h · NORDIC-XXL 16–20 h.

Panels arrive numbered, pre-drilled and grouped by build stage. You'll need a cordless drill, a spanner set, a spirit level and a tape measure. A step-ladder is useful on L, XL and XXL. No concrete, no specialist tools, no builder to pay. If you get stuck, our build-support line is open weekday and Saturday mornings during the install season.

No concrete pad is required for a typical installation. Galvanised ground anchors are included with every NORDIC, and the greenhouse needs a firm, level base appropriate to the ground conditions.

Loose sand, peat, made-up ground, paving or decking can require a different fixing approach. If your ground is unusual, email support@waldenhaus.uk with a photograph before ordering so the installation can be checked.

Swedish pine from sustainably-managed forests, factory pressure-treated to UC3-equivalent standard before despatch. This is pressure-impregnation rather than a surface coat, the same treatment used on agricultural gates. Frame mass runs 95–230 kg packed depending on SKU.

The 10-year anti-rot frame warranty is conditional on re-treating the timber every 2 years with any UK-purchased wood preservative: Cuprinol, Sadolin, Ronseal, supermarket own-brand, whatever's on the shelf. It takes about half a day each visit, and we send a reminder when you're due. Skip the schedule and the cover lapses, though the structure rarely fails in that window. Re-treatment is a precaution rather than a rescue.

CrystalLight twin-wall polycarbonate has a co-extruded UV-stabilised layer on the sun-facing side. Both the 4 mm base panel and the 6 mm option are screw-fixed at every edge.

Clean the panels with warm water, washing-up liquid and a soft cloth; avoid abrasives, solvents and pressure washers. Replacement panels can be supplied in the installed 4 or 6 mm thickness. See our warranty page for the full terms.

Yes, paint to any exterior colour. Sage green, charcoal, cream, Hague blue, whatever your garden's vocabulary wants. Most owners paint at the end of the first growing season once the timber has settled.

Paint on top of the wood preservative, or use a preservative-tinted base coat with paint over it; both approaches work. The 10-year frame warranty holds as long as the timber receives preservative re-treatment every 2 years, under or over the paint. The paint film alone is not classed as preservative, so don't skip the underlying treatment step.

Warm water, a drop of washing-up liquid, a soft cloth or sponge. Avoid abrasive cleaners, solvents and pressure washers: they damage the EPDM washers and can scratch the panel surface. Two cleans a year is plenty for most gardens, late autumn after leaf fall and early spring before serious propagation starts.

Algae on the cellular flutes shows up as a green tinge along the edges in damp seasons. A diluted horticultural cleaner (Citrox or similar, off the shelf at any garden centre) lifts it without harming the polycarbonate.

NORDIC-M (7.8 m² internal floor area) is the most-ordered size by some distance: roughly the working area of a small allotment plot, room for 4–6 tomato plants plus a seed-starting bench. Garden footprints under 50 m² usually land on S or M; 50–150 m² on M or L; over 150 m² on L, XL or XXL.

Among UK greenhouse owners, the most common regret is going too small. If you are between two sizes, take the larger: the step between sizes is £100 to £200 (S to M is £200, every step above that is £100), which is small against a year of growing-space regret. The full ladder: S 5.2 m² → M 7.8 m² → L 10.4 m² → XL 13.0 m² → XXL 15.6 m².

For most UK gardens, no. NORDIC's ridge height is 2.30 m across every SKU, comfortably under the 2.5 m UK Permitted Development cap for outbuildings. Eaves height is 1.51 m, which also sits inside the tighter near-boundary rules.

Three situations where you should ring your council before ordering: a listed property, a designated conservation area, or a plot under an Article 4 Direction (mostly urban conservation zones). Allotment sites typically allow timber-frame greenhouses where they ban polytunnels, but check your tenancy. A plain-language Permitted Development guide ships in your welcome pack.

1-4 weeks from order for UK mainland. We confirm a 4-hour delivery window the day before; the pallet arrives on a tail-lift truck, dropped kerbside. NORDIC pallets are 120 × 80 × 150 cm (Euro-pallet format) and weigh 95–230 kg depending on SKU. Plan one or two people to move components from the kerb to the build location.

UK mainland delivery is included in the price. Scottish Highlands, the islands and Northern Ireland have surcharges or limited service, calculated at checkout, or email us before ordering for a tailored quote. Full carrier terms on our delivery policy.

Photograph the damaged part and the pallet packaging within 14 days of delivery of delivery, then email support@waldenhaus.uk with your order number. We ship replacement components at no charge: no forms, no proof-of-handling-fault arguments. We keep spares on hand, so most replacement parts despatch inside 14 working days.

If a panel chips during build because something went wrong at your end, we'll still sell you a replacement at customer-service rate (well below full retail). Either way, send a photo first. It's faster than a phone description.

You have 14 days from delivery to start a change-of-mind return. The greenhouse must be unused, unassembled and in its original packaging. You arrange and pay the return pallet courier (typically £150–£250 mainland UK).

NORDIC is built largely from standard hardware. The CrystalLight panels are 4 or 6 mm twin-wall polycarbonate, the brackets are 1.2 mm galvanised steel, and the fixings are standard stainless or zinc-plated hardware with washers.

Replacement parts are held for 10 years from purchase. Contact the customer-service team with your order number and a photograph of the component so the correct version can be identified.

Cross-ventilation is standard: a rear opening window opposite the door, so the greenhouse opens front and back. Manual roof vents and the SmartVent auto-opener are optional add-ons; the SmartVent uses a wax-piston that opens around 22°C and closes around 18°C, powered by temperature alone.

For very hot weeks in July and August, the realistic kit is: open the vents and doors at sunrise, a shading kit or whitewash if the plot bakes from the south, and a watering can or drip line for floor evaporation. Twin-wall polycarbonate holds heat well in winter and releases it more steadily than single-pane glass; in summer it is still a sun-trap if you ignore it, the same as every other greenhouse.

Entry-tier aluminium greenhouses and NORDIC serve different requirements. Compare the published frame section, joint design, glazing fixings, anchoring, maintenance and warranty terms rather than the starting price alone.

NORDIC uses a 45 × 45 mm pine frame, 1.2 mm galvanised steel brackets at every node, screw-fixed twin-wall polycarbonate and included ground anchors. Those are the specifications to compare with any alternative.