Quick Code: P175716

1000mm (3′ 3″)
670mm (2′ 2″)
400mm (1′ 3″)
1000mm (3′ 3″) x 670mm (2′ 2″) x 400mm (1′ 3″)
The Alderley cold frame gives seedlings a sheltered start without taking up much room. It stands 400mm high and measures 1000mm wide, so it sits neatly against a wall or at the edge of a bed.
Twin wall polycarbonate glazing holds warmth around young plants while letting the light through. The two lids open independently, and each has a stay with adjustable height settings, so you can vent one side on milder days.
It is built from hardwood and pre-painted in a grey wash, then sealed with a lacquer finish for outdoor use.

1000mm (3′ 3″)
670mm (2′ 2″)
400mm (1′ 3″)
1000mm (3′ 3″) x 670mm (2′ 2″) x 400mm (1′ 3″)

A solid base is the backbone of any greenhouse. You might think skipping this step saves time, but trust me?I've seen plenty of greenhouses fail because of poor foundations. A dodgy base causes more headaches than you'd believe.
What happens with a bad base? Glass cracks. Doors jam. The structure twists. Water pools where it shouldn't. And fixing these problems costs way more than doing it right first time.

The best position for a greenhouse in the UK is south-facing with the ridge running east to west. Keep at least 2 metres from buildings and trees, on level ground with good drainage. A south-facing 6x8 greenhouse runs 3-5 degrees C warmer than the same model facing north.