When a greenhouse pane needs replacing, the first question is what your greenhouse was designed to use. Glass, acrylic and polycarbonate are separate materials, and the word ‘glazing’ can cover all of them. A familiar product name or an attractive price gives you part of the picture; the frame and its fixing system still matter.
Begin with the manufacturer’s instructions and the material already fitted. If you are considering a change, ask the manufacturer or supplier to confirm the proposed replacement for your particular model and pane position.
THE MATERIALS, AT A GLANCE
A closer look before you choose.
These AI-generated illustrations give the material names a little context. Clear sheets can look very similar: appearance alone does not confirm the material, thickness or suitability for your greenhouse.
Glass
Ask whether the quote is for horticultural or toughened glass, and confirm the thickness and glazing arrangement.
Acrylic
Ask for the specific acrylic product and thickness, with suitability for your greenhouse confirmed.
Solid polycarbonate
A solid sheet, illustrated without channels. Ask the supplier to confirm the exact product and outdoor specification.
Twin-wall polycarbonate
The channels are shown at the edge of this structured sheet. Confirm its form, thickness and compatibility with the frame.
Illustrations, not supplier samples. No thickness or performance rating is demonstrated.
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Horticultural glass
Horticultural glass is conventional greenhouse glass. Elite describes its horticultural option as 3 mm sheets arranged with overlaps. That is one manufacturer’s specification; other greenhouses need their own glazing plan checked. Elite glazing options
Ask whether the quotation is for horticultural glass, which thickness is being supplied and whether the pane size belongs to an overlapping arrangement. Keep those details on your enquiry so another supplier can quote for the same requirement.
Toughened glass
Toughened glass has different breakage behaviour from ordinary glass. Elite explains that its toughened glazing breaks into small pieces and is mainly supplied in full-length sheets. Breakage can still cause injury, and handling or fitting needs appropriate care. Elite glazing options
If your greenhouse originally used several overlapping panes, a quotation for a longer toughened pane needs the manufacturer’s confirmation. The proposed glazing arrangement and fixing details should be clear before ordering.
Acrylic
Acrylic is a transparent plastic; Perspex is a brand name for acrylic. It is sold for replacement greenhouse glazing in both standard and custom sizes. The Plastic People advises customers to discuss material suitability before ordering. Acrylic greenhouse glazing
Record the specific product and thickness. ‘Plastic replacement pane’ leaves too much room for two suppliers to offer different things.
Polycarbonate
Polycarbonate is another plastic. It can be supplied as solid sheet or as a structured sheet with internal channels. Palram’s PALSUN data sheet describes solid polycarbonate, while Elite lists twin-wall glazing for its own greenhouse models. Palram solid polycarbonate data, Elite glazing options
Ask which form, thickness and outdoor specification the supplier proposes. Include any uncertainty about the existing frame or fixings.
Make the choice for your greenhouse
Your useful comparison is between confirmed options for the greenhouse you own. Send suppliers the same pane list and ask them to explain any proposed change. If one quotes glass and another quotes plastic, keep those offers separate until their suitability has been established. A clear explanation is more valuable than a universal ‘best material’ recommendation.
Ready to get your notes together? Use the free pane-list planner to prepare an enquiry and compare matching supplier quotes.