For gardeners whose tomato ambitions have officially outgrown the smaller models. The Alaska 3m × 3.7m Glasshouse offers 11.15m² of growing space, giving you plenty of room for seedlings, vegetables, flowers, shelving and a proper potting bench.
Its black aluminium frame and crystal-clear 4mm toughened safety glass create a sharper, more premium look than traditional PVC or polycarbonate-panel greenhouses. Galvanised steel lower panels help protect the base from soil splashback, everyday knocks and stones launched by enthusiastic mowing. Practical, handsome and roomy enough for those suspiciously long “plant inspections”.
- External dimensions: 2990 × 3729 × 2524mm
- Imperial dimensions: approximately 9'8" × 12'3" × 8'3"
- Eave height: 1625mm
- Door opening: approximately 917mm wide × 1909mm high
Specifications & Features
- Wide lockable hinged door
- Four opening roof vents for improved airflow
- Integrated guttering and downpipe
- Bar capping and glazing fixing clips
- Low-entry sill for easier access
- Kitset design for DIY assembly
- Aluminium frame with profiles ranging from 1.5–3.2mm thick
- Black powder-coated aluminium finish
- 4mm toughened safety glass
- Galvanised steel lower wall panels
- Low 28mm aluminium sill base
- Stainless steel bolts and nuts
Foundation Requirements
Install the glasshouse on a flat, level and substantial foundation capable of supporting the full weight of the frame and glass. A concrete slab slightly larger than the footprint is our preferred option, although a solid, properly built and securely anchored timber base may also be suitable. Grass, loose soil and uneven pavers are not recommended.
Assembly & Installation
The Alaska is supplied as a kitset and requires capable people, suitable tools and careful assembly. Follow the supplied instructions, use all braces, clips and fixings, and securely anchor the frame to the foundation. For improved watertightness and reduced glass rattling, we recommend a suitable exterior glazing tape or compatible silicone sealant (not included). No freestyle engineering, thanks.
Delivery is via driveway drop-off, and drivers cannot move the packages beyond the driveway. This model arrives in several large packages weighing approximately 424kg combined, including a glass package of around 262kg, so please arrange suitable people and equipment.
Common Q's:
Is glass better than polycarbonate?
Glass offers a clearer, more premium look than PVC or polycarbonate panels and makes the glasshouse feel more like a proper garden room. It is heavier and still needs to be handled carefully.
Is it suitable for high-wind areas?
No. The Alaska is designed for sheltered residential gardens and does not have a certified wind rating. Avoid highly exposed, severe coastal or extreme-wind locations.
Is it completely watertight?
No kitset glasshouse is completely sealed. Exterior glazing tape or compatible silicone can improve watertightness and reduce rattling, but some water may enter during wind-driven rain.
Can I assemble it myself?
Yes, it is designed for DIY assembly, but it includes heavy glass and requires several capable people, suitable tools and careful attention to the instructions. This is not the day to test the strength of your relationship.
Warranty:
The warranty covers eligible manufacturing defects under our full warranty terms and applicable New Zealand consumer law. It does not cover damage caused by extreme weather, unsuitable or exposed placement, an inadequate foundation, incorrect assembly or anchoring, modifications, impact damage, normal weathering or poor maintenance. In other words, build it properly, put it somewhere sensible and do not let the lawnmower use it for target practice.