James Elston
Published April 8, 2025
Last Updated on April 8, 2025
Can You Use Double Glazing For A Greenhouse? Pros, Cons & Costs
When it comes to building or upgrading a greenhouse, glazing is one of the most critical decisions. If you’re wondering “can you use double glazing for a greenhouse?” — the answer is yes, but with some important considerations.
In this comprehensive guide, we explore whether double glazed windows are suitable for greenhouses in the UK, analyse the benefits, drawbacks, costs, and alternatives. Whether you’re a homeowner, landlord, or commercial grower, this article will help you make an informed choice.
Can You Use Double Glazing for A Greenhouse?
Yes, you can use double glazing for a greenhouse. In fact, it’s becoming an increasingly popular option among landlords, homeowners, and commercial growers seeking greater energy efficiency and long-term durability. Still unsure whether double glazing is worth it?
Here are key factors to consider before committing.
Pros of Using Double Glazing in a Greenhouse
| Improved Insulation | Double glazing significantly reduces heat loss, maintaining a more stable internal temperature, which is ideal for overwintering delicate plants or reducing reliance on greenhouse heaters. |
| Condensation Control | Double glazed units reduce internal condensation, which can help prevent mould, fungal infections, and plant diseases. |
| Noise Reduction | If your greenhouse is in a built-up area or near a road, double glazing can help minimise noise pollution, making it a more peaceful environment for working or relaxing. |
| Durability & Security | Toughened or laminated double glazed panels offer enhanced security and are more resistant to impact than single-pane options like horticultural glass. |
| Energy Efficiency | Especially in heated greenhouses, double glazing can reduce heating bills. It’s a smart move for eco-conscious property owners or commercial growers looking to lower operating costs. |
Drawbacks of Using Double Glazing in a Greenhouse
Despite the benefits, there are a few drawbacks and practical considerations:
| Cost | Double glazed units are considerably more expensive than standard greenhouse glazing options like polycarbonate or horticultural glass. (See cost table below.) |
| Weight | These units are much heavier, requiring a stronger frame and robust foundations. Most off-the-shelf greenhouses are not suitable for retrofitting with double glazing. |
| Light Transmission | Double glazing reduces light transmission slightly compared to single-pane glass or clear polycarbonate, which may affect photosynthesis for certain light-sensitive plants. |
| Ventilation Needs | Double glazed greenhouses tend to retain heat well, which can be a downside during hot summer months. Adequate ventilation and shading systems will be essential. |
What Is the Average Cost of Installing Double Glazing in a Greenhouse
Here’s a general cost breakdown for UK homeowners and landlords considering this upgrade:
| Item | Estimated Cost (per m²) | Notes |
|---|---|---|
| Double glazed glass panels | £90 – £120 | Toughened safety glass typically used |
| Custom greenhouse frame | £150 – £250 | Steel or aluminium frames required |
| Installation costs | £200 – £400/day | Professional installation recommended |
| Total estimated cost (small greenhouse | £2,500 – £5,000+ | Varies based on size and location |
If you’re looking for a deeper breakdown, check out our double glazing costs guide which offers expert insights
And if you’re also planning to upgrade the windows in your home, don’t miss our full new window costs guide, which covers pricing for all major window types including casement, sash, bay, and more.
Get a Free Quote for New Windows Today!
Thinking about upgrading your greenhouse with double glazing or replacing windows across your property? We make it simple.
Simply request a free, no-obligation window replacement quote from experienced installation professionals who understand your needs. From greenhouse panels to full home window replacement.
Final Thoughts
If you’re simply looking to overwinter a few plants, alternatives like twin-wall polycarbonate may be more cost-effective. But for those with serious growing ambitions or multi-purpose garden rooms, double glazing offers longevity and efficiency that can pay off over time.
James Elston
Boiler Expert
James Elston is the top boiler replacement and heating expert at Eco Happy. He has over 20 years of experience in the industry, focusing on Gas Safe boiler installations and offering home-heating and energy-saving solutions to homeowners across the UK. From sourcing the most energy-efficient combi boiler to providing specialist heating advice, James ensures that Eco Happy maintains the highest standards and best customer service.