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What glazing option is right for me?

An often asked question when buying a greenhouse and we would always recommend toughened safety glass because of its strength and safety aspects. Traditionally, greenhouses have been supplied with 3mm horticultural glass - It may be cheap but it isn’t safe, as it breaks easily.


Below is a handy glazing guide.

Horticultural Glass

The standard greenhouse glazing offered by most brands is 3mm horticultural glass.
However, whilst low in cost, there is a sacrifice of safety and today the trend is towards safer and stronger glazing alternatives. The individual panes supplied measure 2ft x 2ft, overlap mid-way on each section of the greenhouse and are then held together with "S" clips.
The major disadvantage of 3mm horticultural glass is when it breaks it does so into large dangerous shards. Cleaning also proves difficult as dirt and algae gather in the joins where the two panes meet.

Toughened Safety Glass

Toughened safety glass is the best option as it offers a good degree of safety, meaning that if it breaks, it breaks safely.

The large panes have no overlaps, which means fewer draughts and they are easier to keep clean as the overlaps tend to attract dirt and algae over time.
Rhino Tuff 4mm toughened safety glass is 33% thicker than most greenhouse glass and comes as standard with every Rhino greenhouse. Even the edges of the glass are rounded so that you don’t cut yourself during installation.

Polycarbonate Glazing

Twin wall polycarbonate has the advantage that it offers increased insulation, which may be useful in the winter months. It does, however, suffer from two major disadvantages.

Polycarbonate is so light that it makes the greenhouse vulnerable to wind damage. It also reduces light levels, which can be a problem for your plants.