What is the Norhage Tre 300 made from?

It is built from impregnated Swedish pine with solid plywood Gothic arches. The pine is pressure treated at the factory, so it resists rot without annual painting.

Is the glazing glass or polycarbonate?

It is glazed in 6mm twin-wall polycarbonate as standard. You can upgrade to 10mm or 16mm for colder or more exposed plots. Twin-wall holds heat better than a single pane and will not shatter.

How long is the warranty?

The frame has a 5-year guarantee and the polycarbonate a 10-year guarantee. Both apply when the greenhouse is built to the instructions.

What base does it need?

A level, solid base of concrete or paving slabs. Grass and bare soil are not enough, because the frame needs an even bearing all round. Get it down before the delivery date.

Is installation included?

No, the Tre 300 is supplied flat-packed for self-assembly. Delivery to the UK mainland is free, within five weeks of order.

Will it stand up to snow and wind?

Yes, it is rated to a 280 kg/m² snow load and 25 m/s wind. The Gothic arch sheds snow, and the frame is engineered for Nordic winters.

Wooden Greenhouses
Norhage Greenhouses

Norhage Greenhouses

Norhage builds wooden greenhouses in Norway, engineered for Nordic winters. The frames use impregnated Swedish pine with solid plywood arches. A Gothic-arch roof sheds snow rather than holding it. Every model is rated to a 280 kg/m² snow load and 25 m/s wind. Glazing is twin-wall polycarbonate. It holds heat better than glass and will not shatter. The freestanding Tre 300 spans five lengths from 4 to 12 metres. Two wall-mounted Vegg lean-tos suit terraces and existing walls. Free UK delivery within 5 weeks.

Every Norhage greenhouse sits in our wooden greenhouses range as the polycarbonate option. Most timber houses here are glazed in glass. Norhage uses twin-wall polycarbonate on a Swedish pine frame instead. The freestanding Tre 300 is 3 metres (10ft) wide with a 2300mm (7ft 7") ridge, so you work standing up. The Lite Vegg 150 and Vegg 300 mount against an existing wall, with no back panel to build. Prefer glass? Compare the Swallow and Palmako ranges.

Freestanding & Lean-To Tre 300 houses plus Vegg wall-mounted models

FREE delivery within 5 weeks

FREE delivery within 5 weeks

⛟

~~£3,299~~

£3,099

Need Help Choosing?

Which greenhouse? Compare glazing, sizes and styles to find your match. Buyer's guide Materials, sizing, glazing and prices explained. Installation Base prep, assembly and our professional fitting service.

Or call our team free on 0800 098 8877

Verified Customer

The product came very well packed and the driver put it where requested on my drive. I was called a week before delivery by the office to confirm the day. Almost everything needed to construct the greenhouse was included except spanners. Wall fixings, mastic and gun were. The manual was very good but does need to be read before starting and may be a bit difficult for a non practical person to get their head around. I Would definitely recommend Greenhouse Stores and the Elite Easygrow lean-to.

Verified Customer

Excellent varied stock. Prices & inclusive items were very favourable. Delivery & erected Swallow Jay potting shed was swift , professional, polite & efficient. I am extremely satisfied with my experience with Greenhouse Stores

Verified Customer

The instructions were very good and building the greenhouse was like a giant mechano set. The one thing that threw me was the website and instructions showed the glazing for the walls in two pieces. What was delivered were single sections and it took me a while to find the revised instructions.

Verified Customer

I haven't managed to erect my greenhouse yet, but so looking forward to having it.

Verified Customer

Very pleased with the Greenhouse. The installation was ably carried out by your expert team - grateful thanks.

Verified Customer

Delivery driver was very good the greenhouse was built up very quickly

Verified Customer

Excellent communication, well packed when delivered.my husband did find some of the instructions unclear when fitting the doors but overall quite good.
All looking very good,I am pleased with this product and would recommend this company.

Verified Customer

Very satisfied needed to call for technical support and received prompt and helpful response

Verified Customer

Very happy with greenhouse/shed combo. The guys put it up quickly.

Verified Customer

Very helpful. Great delivery. Looks good:
we will see after I’ve built it.

Verified Customer

The greenhouse parts plus glass arrived safely packed.
We erected the greenhouse ourselves and after a couple of initial errors we got into the swing of it and are really pleased with the results.
The diagrams in the instruction manual could be clearer but we got there, though it did seem to take many hours.

Verified Customer

Unfortunatly has not been put together yet,

Verified Customer

great comminication throughout and a great product

Verified Customer

We haven’t even opened it yet - waiting for greenhouse to be erected 😂

Verified Customer

Extremely helpful, could answer all my questions and give advice. Delivery was first class, one of the best delivery companies I've dealt with if not the best.
Product is fitted and looks great.

Verified Customer

It was easy to choose the greenhouse itself and then the extras. Hassle free and it was delivered when expected. I would however advise that you may want to hire someone to put it together for you, unless you are good at following this sort of instructions. The greenhouse looks fantastic and I am very happy to have bought it. I would recommend the Greenhouse Stores.

Verified Customer

Great service, arrived when expected greenhouse excellent quality easy to assemble no items missing

Verified Customer

Very good great greenhouse put up in a day

Verified Customer

Delivered on time and the fitters they recommended were excellent.

Verified Customer

I have done this twice??????

Verified Customer

ordered a 4x6 greenhouse which was delivered on time. My son put it up in a day and it looks lovely. Can't wait for the next spring growing season.

Verified Customer

Great in communication. Attentive. Concrete base layer needed and link to him enabled him to do it. Lean to greenhouse efficiently assembled. Highly recommended

Verified Customer

Brilliant service from start to finish and a slight issue with my order was resolved extremely quickly great service

Verified Customer

Great product and straight forward to assemble, would suggest a few addition 3D views in the assembly manual but thats only so you can confirm which orientation you are working on. Also make sure the base is securely fixed prior to the build and ensure you are within 1mm on corner to corner measuring so you know you are square before you start building up. Some of confusion on some of the instructions as the description can be read several ways. All in all a very simple build. Only concern is how it acts in strong winds, I have positioned mine adjacent to a fence on one side and a structure at the rear to try and reduce the potential for wind causing damage

About the Norhage Tre 300 Wooden Greenhouse

Norhage builds greenhouses in Norway for Nordic winters. The Tre 300 is their freestanding model, and it looks different to most timber greenhouses. Instead of a straight apex roof, it uses a Gothic arch made from solid plywood ribs. That curve sheds snow rather than holding it. It is why the frame is rated to a 280 kg/m² snow load and 25 m/s wind. The frame is impregnated Swedish pine, pressure treated at the factory, so it does not need annual painting.

Most wooden greenhouses on this page are glazed in glass. The Tre 300 is glazed in 6mm twin-wall polycarbonate instead. The twin wall traps a layer of air, so it holds heat better than single glass and will not shatter. You can upgrade to 10mm or 16mm polycarbonate for colder plots. Every Tre 300 is 3 metres wide with a 2300mm (7ft 7") ridge. You work standing up, with beds down both sides and a path between.

Five lengths cover most gardens, from a 4-metre starter house up to a 12-metre plot for serious growing. Prices run from £2,399 to £4,850. Compare the wider wooden greenhouses range, or the glass Swallow and Palmako ranges if you prefer a glasshouse. Every Tre 300 comes with free UK mainland delivery, a 5-year frame guarantee and a 10-year guarantee on the polycarbonate.

Why We Chose This Range

"Most timber greenhouses use glass and a straight roof. The Norhage is different. The Gothic arch sheds snow, and the twin-wall polycarbonate holds heat far better than a single pane. It is built for a proper winter, and you can feel that in the frame. For anyone growing through the cold months on an exposed plot, it is the timber house I would pick."

Matt, Founder of Greenhouse Stores

Matt's Tip: Get the base right first

The Tre 300 needs a level, solid base. Concrete or slabs, laid flat and square along the whole 3-metre width. Build the base before delivery, so you can start the day the kit arrives. A twisted base makes the arches hard to line up.

Matt's Tip: 6mm, 10mm or 16mm glazing?

The standard 6mm polycarbonate suits most gardens. Choose the 10mm or 16mm upgrade if your plot is exposed or you grow through winter. The thicker sheet holds more heat and stiffens the roof. It costs a little more, but it pays back on the coldest nights.

Matt's Pick: Norhage Tre 300 10x20

Best For: the family grower who wants room without filling the garden

Why I Recommend It: the 6-metre length gives eighteen square metres, with beds down both sides and a path wide enough for a barrow. It is the size most people settle on.

Price: from £3,349

View Product

Compare the Norhage Tre 300 range

Model	Footprint	Floor area	Best for	From
Tre 300 10x13	3m x 4m (10x13)	12m²	A starter house in a smaller garden	£2,399
Tre 300 10x20 ⭐ Matt's Pick	3m x 6m (10x20)	18m²	Succession growing with beds down both sides	£3,349
Tre 300 10x26	3m x 8m (10x26)	24m²	Room to grow and sit	£3,850
Tre 300 10x33	3m x 10m (10x33)	30m²	Serious growing at scale	£4,350
Tre 300 10x39	3m x 12m (10x39)	36m²	Smallholdings, schools and community plots	£4,850

Frequently asked questions

What is the Norhage Tre 300 made from?

It is built from impregnated Swedish pine with solid plywood Gothic arches. The pine is pressure treated at the factory, so it resists rot without annual painting.
Is the glazing glass or polycarbonate?

It is glazed in 6mm twin-wall polycarbonate as standard. You can upgrade to 10mm or 16mm for colder or more exposed plots. Twin-wall holds heat better than a single pane and will not shatter.
How long is the warranty?

The frame has a 5-year guarantee and the polycarbonate a 10-year guarantee. Both apply when the greenhouse is built to the instructions.
What base does it need?

A level, solid base of concrete or paving slabs. Grass and bare soil are not enough, because the frame needs an even bearing all round. Get it down before the delivery date.
Is installation included?

No, the Tre 300 is supplied flat-packed for self-assembly. Delivery to the UK mainland is free, within five weeks of order.
Will it stand up to snow and wind?

Yes, it is rated to a 280 kg/m² snow load and 25 m/s wind. The Gothic arch sheds snow, and the frame is engineered for Nordic winters.

Need help choosing?

Call our team on 0800 098 8877. We can match the right Tre 300 length, glazing and base to your garden.

Norhage

Norhage builds wooden greenhouses in Norway, engineered for Nordic snow and wind. The Tre 300 pairs a Gothic-arch pine frame with twin-wall polycarbonate glazing.