9' x 12' Made to Measure Double Glazed uPVC Greenhouse

Ultimate uPVC Greenhouse 9' x 12' – Double Glazed with Cresting and Finials

Create a substantial year-round growing space with our 9' x 12' Made to Measure Double Glazed uPVC Greenhouse. Manufactured in Bristol using strong, low-maintenance uPVC profiles, this large greenhouse combines 28mm toughened double glazing with a 25mm multiwall polycarbonate roof for excellent insulation, natural daylight and long-term durability.

With its generous 9' x 12' footprint, this greenhouse provides significantly more growing and working space than a conventional small garden greenhouse. It is particularly well suited to serious gardeners with larger plant collections, extensive staging, propagation areas or plants requiring additional protection during winter.

Large Double Glazed Greenhouse for Year-Round Growing

The greenhouse is constructed using 28mm toughened double-glazed sealed units, providing much better insulation than traditional single greenhouse glazing.

Reducing heat loss through the glazed sides helps create a more protected growing environment during colder periods and makes the greenhouse particularly suitable for gardeners who want to extend the growing season.

If you use greenhouse heating during winter, the double-glazed construction helps retain more of the heat being produced, reducing unnecessary heat loss compared with a conventional single-glazed greenhouse.

Winter Protection for Tender and Frost-Sensitive Plants

The improved insulation makes this double glazed greenhouse particularly useful for overwintering valuable, tender and frost-sensitive plants.

Depending on their individual temperature requirements, the greenhouse can provide additional winter protection for:

• Citrus plants
• Tender and young plants
• Frost-sensitive plants
• Pelargoniums and geraniums
• Tender herbs
• Seedlings and young plants
• Overwintering container plants
• Selected Mediterranean and exotic plants

Please note: double glazing improves insulation but does not guarantee that the greenhouse will remain frost-free. Plants requiring a specific minimum temperature may still need a suitable thermostatically controlled greenhouse heater during prolonged or severe cold weather.

Made to Measure uPVC Greenhouse

Although this model is based around a popular 9' x 12' greenhouse size, our greenhouse system is made to measure.

This means you are not necessarily restricted to a standard off-the-shelf size. The greenhouse can be manufactured around the available space and your individual requirements.

Made-to-measure construction can be particularly useful for:

• Existing greenhouse bases
• Replacement greenhouse projects
• Patios and paved areas
• Large garden growing areas
• Spaces alongside walls or other buildings
• Gardens requiring non-standard dimensions

28mm Toughened Double Glazing

The greenhouse sides feature 28mm toughened double-glazed units, combining excellent natural light with improved thermal insulation.

Toughened safety glass provides strength and durability, while the substantial double-glazed construction gives the greenhouse a solid and permanent feel compared with lightweight seasonal greenhouse designs.

25mm Multiwall Polycarbonate Roof

A durable 25mm multiwall polycarbonate roof completes the greenhouse structure.

Multiwall polycarbonate provides a practical combination of strength, low weight, insulation and light diffusion, helping create suitable growing conditions while reducing the weight associated with a fully glazed roof.

Roof and Side Ventilation

Controllable ventilation becomes increasingly important in a larger greenhouse, particularly during sunny and warmer periods.

Ventilation options include:

• Roof Vent: Allows rising warm air to escape from the upper section of the greenhouse.
• Lockable Side Vent: Introduces additional controllable airflow at a lower level.

The combination of high and low-level ventilation helps you manage airflow and temperature as conditions change throughout the year.

Generous 9' x 12' Growing Space

The additional width of a 9' x 12' greenhouse provides considerable flexibility when planning the interior.

There is room for substantial staging and growing areas on both sides while maintaining practical access through the greenhouse. The larger floor area can also make it easier to separate propagation, growing and overwintering areas.

This makes the greenhouse particularly suitable for:

• Large plant collections
• Greenhouse staging and shelving
• Tomatoes and greenhouse vegetables
• Seed trays and propagation
• Large pots and containers
• Overwintering tender plants
• Taller greenhouse plants
• Separate growing and propagation areas
• Heated winter growing

Low-Maintenance uPVC Greenhouse

The greenhouse is manufactured using durable uPVC profiles, providing a strong and low-maintenance alternative to traditional timber greenhouse construction.

uPVC does not require regular painting or staining and is easy to clean, making it particularly suitable for a substantial greenhouse intended for long-term use.

Secure Lockable Greenhouse Door

A substantial entrance door with a lockable handle and heavy-duty hinges provides secure and convenient access.

As the greenhouse is made to measure, the configuration can be selected to work with your garden layout and planned internal growing areas.

Decorative Cresting and Finials

Traditional roof cresting and finials provide an attractive finishing detail and give this larger greenhouse a more distinctive appearance within the garden.

125mm Regency Guttering

The greenhouse incorporates 125mm Regency guttering to manage rainwater from the polycarbonate roof.

Collected rainwater can be directed away from the greenhouse or potentially connected to suitable water storage equipment for reuse around the garden.

Made to Measure Double Glazed Greenhouses Bristol

Our double glazed uPVC greenhouses are made to measure in Bristol, providing a substantial alternative to standard lightweight garden greenhouses.

We supply homeowners, keen gardeners and trade customers throughout Bristol and the surrounding area, with delivery options also available elsewhere in the UK.

9' x 12' Double Glazed Greenhouse Specification

• Product: Made to Measure uPVC Greenhouse
• Popular Size: Approximately 9' x 12'
• Construction: Made to Measure
• Frame: Low-Maintenance uPVC
• Side Glazing: 28mm Toughened Double Glazing
• Roof: 25mm Multiwall Polycarbonate
• Roof Ventilation: Available
• Side Ventilation: Lockable Side Vent
• Door: Lockable with Heavy-Duty Hinges
• Guttering: 125mm Regency Guttering
• Decorative Features: Cresting & Finials
• Typical Use: Year-Round Growing & Winter Plant Protection
• Manufactured: Bristol

Heating a Large Double Glazed Greenhouse in Winter

If plants need to remain above a particular minimum temperature, a suitable thermostatically controlled greenhouse heater can be used during colder periods.

With a greenhouse of this size, insulation becomes particularly important. The 28mm double glazing helps retain heat more effectively than conventional single greenhouse glass, making it a practical choice for gardeners who intend to heat their greenhouse during winter.

Delivery

Standard delivery is normally available within approximately 2–4 weeks, subject to specification and current manufacturing schedules.

Due to the size and weight of the greenhouse components and double-glazed units, suitable assistance will be required when unloading.

An optional 2-man delivery service is available where unloading assistance is required. An additional charge applies.

Order Your 9' x 12' Double Glazed Greenhouse

Choose the dimensions and configuration required to create a made-to-measure double glazed greenhouse designed around your available garden space and growing requirements.

With its 28mm toughened double glazing, 25mm polycarbonate roof, ventilation, low-maintenance uPVC construction and generous 9' x 12' growing area, this is an excellent greenhouse for serious gardeners wanting more space and greater protection for year-round growing.