Page 8 - Harrods - Greenhouse 2021
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Recent winters have seen stronger winds and storms putting greenhouse frame strengths to the test. Cheaper models using flimsy frames have failed the winter test
and collapsed under the strain or blown away. We are so confident in the strength of our Harrod Superior Aluminium Greenhouse frames that we happily sat five men on the apex weighing nearly half a tonne! We purposely build
our aluminium frames much heavier than any of our competitors, the ridge is up to 50% thicker, the glazing bars and door sides are up to 30% thicker and the eaves are up to 130% heavier. A number of heavy duty 3mm thick glazing bars are used throughout the framework to add significantly to its strength - 3 are used on every roof bay at 2ft intervals, 2 at the eaves and a longer one at the ridge. In addition a heavy duty glazing bar is used at the ridge of every greenhouse. We also add the following elements to increase the overall strength –
• Robust braces fitted to every ridge and eave bar
• Heavy duty glazing bar at the rear
• A thick bar halfway along the sides and roof
• Tworobustbracesontheeavesandlongerbraces
on the eaves of each roof bay
• 4mmtoughenedglassstrongenoughtoholdthe
weight of a van, 33% thicker than other models in the market
Diagram (A) below shows how the Harrod Superior Glazing Bead (in blue) locks the rim of the glass firmly in place.
We build all our Harrod Superior Greenhouses to a maximum height of 5ft 5” to the eaves, a lot taller than competitor models. This provides extra growing height
for tall plants such as tomatoes and cucumbers, enough height for hanging baskets and keeps plants away from glass to prevent scorching. Experts recommend ordering a greenhouse in the size larger than you anticipate needing as it is easy to fill up quickly. Our Harrod Superior Greenhouse range is available up to 12ft wide x 18ft long so you are sure to find a size to meet your requirements. For maximum height we recommend our 8ft wide models as the ridge is 8ft 4”, the tallest we are aware of in the market place!
Large pane toughened glass offers strength and extra insulation and doesn’t overlap. The 4mm toughened float glass (not weaker horticultural glass) used in the Harrod Superior Greenhouses is also safer for family gardens as it
is 33% thicker than standard greenhouse glass so less likely to break during family games. Toughened glass is also safer because it shatters into blunt crystals not dangerous shards.
To further enhance the strength of our aluminium greenhouse frames, each one of our individual panes of glass locks into place along its total length using a squeegee fin. The soft rubber edge of the squeegee fin seals the glass against rain and wind. Competitor greenhouses use caps or glazing beads to lock each pane of glass in place, replacing the usual W clips for aesthetic reasons rather than to provide extra strength.
3mm thick glazing bars
                 GLASS CAN’T MOVE
     Inferior greenhouses use small or large pane glazing which allows the frame to distort. The extra strength provided by the Harrod Superior Glazing System prevents the roof and the sides of the greenhouse becoming distorted by wind as they always remain square.

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