Description

What safeguards the wood against environmental damage?

Defending against weather elements, this 12ft x 12ft wooden pergola utilises pressure-treated timber that actively helps resist moisture ingress and fungal decay. Sourced from sustainable softwood, every heavy-duty component, including the 90mm x 90mm posts and the 28mm decking, receives a deep industrial preservative wash prior to delivery. This chemical process penetrates the pine fibres entirely, ensuring the massive 12 x 12 structure can withstand prolonged exposure to damp British winters. Coating the wood with a breathable, water-resistant finish following construction will further protect the exterior grain and maintain the visual appeal.

How stable is the heavy-duty vertical and overhead structure?

The 12 x 12 wooden pergola achieves exceptional structural rigidity by combining 90mm x 90mm corner posts with dense 28mm x 120mm roof joists. This cavernous timber framework relies on corner bracing to prevent twisting and maintain a perfectly square layout throughout its operational life. The open-slatted overhead softwood beams distribute weight evenly across the vast 12ft x 12ft footprint, establishing a reliable architectural feature that handles year-round conditions. Once secured upon a flat, firm foundation, the substantial wooden columns resist wind deflection to keep the entire outdoor enclosure firmly anchored.

Does this garden kit require a separate patio foundation?

Featuring an integrated 28mm pine floor, this 12ft x 12ft timber kit, the supplied grooved decking builds a dedicated, perfectly level seating zone immediately below the 28mm x 120mm overhead canopy. Designed with a textured surface profile, the 28mm boards provide enhanced underfoot traction that proves highly beneficial during wet or humid weather. Spanning the entire 12 x 12 boundary, the heavy-duty wooden base easily supports substantial weights, making it ideal for hosting oversized garden furnishings securely.

Features:

Guarantee – 10-year anti-rot

Post Size – 90mm x 90mm

Roof Joists – 120mm x 28mm

Deck Boards – 120mm wide x 28mm deep

Treatment – Pressure-treated (application of preservative and waterproof coat required)

How to Utilise a 12ft x 12ft Wooden Pergola With Decking

Designate the monumental 12 x 12 capacity as an expansive hosting venue by arranging an oversized L-shaped rattan sofa directly across the 28mm grooved pine floor. The perfectly square decking offers an abundance of room for freestanding gas heaters, while the thick 28mm x 120mm roof joists cast a beneficial shadow to cool the area during intense summer afternoons. Suspending weather-proof outdoor lanterns from the overhead timber beams illuminates the vast seating arrangement for extended nighttime usage.

Utilise the towering 90mm x 90mm upright posts to cultivate a wraparound botanical display. Heavy, soil-filled planters sit firmly on the durable 28mm decking, giving trailing varieties like honeysuckle a clear path to scale the pressure-treated softwood. As foliage winds through the overarching joists, it generates a natural, living roof that blends the massive 12ft x 12ft structure seamlessly into the surrounding garden landscape.

About Your Order

The Shire pergola and decking is made in the UK with sustainably sourced timber. You get a top-quality wooden decking with a low carbon footprint made from ethically sourced materials. The clean and straightforward design makes it easy to assemble, please note that the fixtures and fittings required are not included as part of your order. The decking has a 10-year anti-rot guarantee and a 12-month manufacturer's warranty to enjoy it for many seasons.

Pergola and Decking Maintenance

The Pergola and Decking is made with pressure-treated timbers. The pressure treatment process forces preservatives into the wood under high pressure. It provides effective long-term protection against rot and fungus. Pressure treatment is almost colourless except for a light green tint caused by the copper content in the preservative. Over time, the treatment greys, but this does not affect the quality.

Shire, the manufacturer, advises that you must apply a wood stain, paint or waterproofing topcoat to make the product more water-resistant. The treatment must be carried out immediately after installation. Using the treatment after installation, followed by consistent annual treatment of the garden arbour, will maintain the high-quality finish and is a requirement of the 10-year anti-rot guarantee. A 1-year manufacturer's warranty is included as standard.

To treat the decking and pergola, elbec recommends Protek wood treatment. Browse our Protek Royal Exterior Wood Finish Paint range to find the best paint colour to add your personalised finish. In the options section, we’ve included popular colours and a Wood Preserver+ for use underneath your colour choice.

About Shire

Shire is one of the UK's leading manufacturers of garden buildings. It is the proud manufacturer of the most extensive UK timber garden building range, which includes Garden Sheds, Log Cabins, eco homes, Home Offices, Sheds, Workshops, Summerhouses, Playhouses, Arbours, Storage units, and Pet houses.

Their UK production facilities cover 23 acres, including stock holding facilities and an advanced high-speed timber planing mill. There is also a modern, well-equipped joinery production facility and semi-automated production lines. All Shire garden buildings are manufactured in the UK using the finest spruce timber, imported directly, and manufactured using the most up-to-date machines to ensure the best quality and best value for money garden sheds in the UK.

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Delivery

ALL DELIVERIES ARE DELIVERED TO KERBSIDE AND ARE FLAT PACKED READY FOR ASSEMBLY

FREE delivery is offered to the majority of mainland UK postcodes but some areas may incur a surcharge and some postcode areas are not covered at all. Please check your postcode in the ‘Delivery cost checker’ above to confirm availability and any possible surcharges.

Delivery Leadtimes
The estimated delivery lead time for this product is identified on the product page above. Lead times are in working days (Monday - Friday) excludes Bank Holidays. These estimated lead times are provided by the manufacturers and are not guaranteed - due to fluctuation in demand - but are provided in good faith and are representative of delivery at that time. Some remote areas will take a little longer.

Booking Delivery
By entering your postal code in the ‘Pick a delivery day. ENTER POSTCODE’ Box above you can select a delivery date. The evening before this delivery date you will be sent a text message (where a mobile has been provided) with an estimated delivery window.  This update can only be provided where a mobile number has been supplied on the billing address section at the time of checkout.

Upon Delivery
Delivery is made by Shire the manufacturer. Delivery of this item is typically made by a 17 ton flat-bed (similar size to a council refuse lorry). Delivery is typically between 7am and 7pm. The delivery drivers are only insured to deliver to kerb side or driveway. We would not risk damaging your property whilst delivering a product. Unfortunately we will not be able to go through your property. Deliveries are hand-balled off by the driver.

We would recommend against arranging for a third party to install the building before it's been delivered and checked that all parts are present, as we cannot be held liable for any third-party costs.

Installation option
If you are choosing the installation option after placing your order you’ll be contacted within 5 working days by Shire the manufacturer either by a text message or automated telephone message (the latter if a mobile number is not supplied). This message will supply you with the name of the website to go on to where you will be required to accept the terms and conditions for assembly. Any delay in accepting these terms and conditions may affect your timescale. Once you have accepted these terms and conditions you will be contacted during the timescale with a date for the delivery/assembly of your order. The installation option will extend your lead time by up to 15-25 working days. This may take longer during seasonal periods. Please be aware that the installation team will require full access to your garden, 18" clearance all around the building and a firm and level base. Shire's installation team will not bring a building through your home as they are not covered by insurance to enter a customer’s home.

Specification

Quickview

Forming a vast, perfectly square outdoor shelter, the 12ft x 12ft Shire wooden pergola kit with integrated pine decking caters to property owners seeking an extensive, hard-standing al fresco lounge. Constructed within Britain using pressure-treated timber, this complete garden installation mounts directly onto level ground to create a durable platform that defends against weather elements. Key features include:

• 12ft x 12ft footprint: Accommodates monumental dining sets or sprawling corner sofa arrangements with ease.
• 28mm x 120mm roof joists: Ensures robust overhead stability throughout harsh UK seasonal shifts.
• 90mm x 90mm posts: Creates an uncompromising vertical support structure for constant garden deployment.
• 28mm grooved decking: Delivers a reliable underfoot foundation equipped to handle damp outdoor conditions.
• Pressure-treated softwood: Helps resist moisture ingress and combats decay to prolong the lifespan of the build.