Planed Larch 4 Pitch Pergola with Open Roof – Contemporary Garden Structure

The Planed Larch 4 Pitch Pergola with Open Roof is a striking outdoor structure designed for those who want architectural presence without blocking light or openness. Featuring a four-sided pitched roof frame, this pergola delivers excellent visual balance and structural stability while maintaining an open, airy feel that enhances any garden or patio.

Open Roof 4 Pitch Design

The 4 pitch structure creates a strong, pyramid-style frame that distributes weight evenly across all sides, improving overall stability. The open roof design allows sunlight to flow freely through the structure, making it perfect for relaxed outdoor living, climbing plants, or decorative lighting without enclosing the space.

Unlike fully roofed pergolas, this open design keeps the area beneath feeling spacious while still benefiting from the architectural strength of a 4 pitch layout.

Smooth Planed Larch Timber

Manufactured from smooth planed larch, this pergola offers a refined, contemporary finish with excellent outdoor performance. Larch is naturally resilient and, when pressure treated, provides strong resistance to rot, moisture, and insect damage. The planed finish gives a clean, premium look that works well in both modern and traditional garden settings.

Why this pergola works so well

4 pitch open roof structure
Delivers excellent stability and visual symmetry while maintaining an open, light-filled environment.

Smooth planed larch construction
Provides a high-quality finish with long-lasting durability for outdoor use.

Heavy-duty 6" x 6" posts with 4" x 2" beams
Creates a robust, solid frame that feels secure once installed.

Flexible on-site fitting
Includes components such as featheredge boards, tongue & groove boards, and battens that are cut to size during installation, allowing a tailored fit for your specific layout.

Supplied in kit form
All fixings and instructions are included, making installation achievable for experienced DIYers or professional installers.

Bespoke sizing available
Allows the pergola to be customised to suit your garden or patio without compromise.

Important installation information

This pergola kit includes components that require cutting to size during installation. This provides greater flexibility on-site but is best suited to installers comfortable with light cutting and adjustment.
If you’re looking for a fully pre-cut, ready-to-assemble pergola, our Apex Pergola range offers both overhang and no-overhang options designed for easier installation.

This pergola is not designed to be installed as a freestanding structure. For safety and long-term stability, it must be securely fixed into the ground using one of the recommended fixing options.

Specifications overview

• Available lengths: 1.8m (6ft) up to 4.2m (14ft)

• Available widths: 1.8m (6ft) up to 4.2m (14ft)

• Total height: 270cm – 285cm

• Post height: 2320mm

• Post size: 145mm x 145mm

• Corner brackets: 95mm x 45mm

• Timber: Smooth planed larch

• Treatment: Fully pressure treated

• Fixings: All fixings included*

• Weight: 280kg

FAQs

What is a 4 pitch pergola design?
A 4 pitch pergola features four sloping sides that rise to a central point, forming a pyramid-style frame. This creates strong visual symmetry and distributes weight evenly across the structure.

How does a 4 pitch pergola differ from a standard apex pergola?
An apex pergola has two sloping roof sides that meet along a ridge, while a 4 pitch pergola slopes on all sides and meets at a single central peak. The 4 pitch design offers a more balanced appearance and improved stability.

Why choose an open roof 4 pitch pergola?
An open roof allows sunlight and airflow through the structure while still benefiting from the architectural strength of a 4 pitch frame. It’s ideal for bright seating areas, planting, or decorative lighting.

Is the timber suitable for long-term outdoor use?
Yes. All structural timber components are fully pressure treated to help protect against rot, moisture, and insect damage.

Can this pergola be made to bespoke sizes?
Yes. In addition to the standard size options, custom dimensions can be produced to suit specific garden layouts or design requirements.

Is this pergola suitable for exposed gardens?
The 4 pitch design offers excellent structural balance, making it well suited to open or exposed areas when correctly installed and fixed.

Does this pergola provide shade?
The open roof design provides partial shade depending on the sun’s position, while allowing the space to remain light and airy throughout the day.

Installation

Is the pergola supplied fully assembled?
No. The pergola is supplied in kit form. Some components, such as featheredge boards and battens, will require cutting to size during installation to allow for a tailored on-site fit.

Is this pergola suitable for DIY installation?
Yes, for confident DIYers or professional installers. Full instructions are provided, though light cutting and adjustment will be required during assembly.

Are all fixings included?
Yes. All standard fixings needed for installation are included in the delivery.

Can the pergola be installed as a freestanding structure?
No. For safety and long-term stability, the pergola must be securely fixed into the ground using one of the recommended fixing options.

Aftercare & Maintenance

Can the pergola be painted or stained?
Yes. Once the timber has fully dried, water-based paints or stains can be applied. A UV-protective finish is recommended to maintain appearance.

How often should the pergola be maintained?
Basic maintenance every 6–12 months is advised. This includes checking fixings, cleaning surfaces, and reapplying protective treatments if needed.

How long is this pergola designed to last?
With correct installation and regular maintenance, the pergola is designed to provide reliable outdoor performance for 10–20 years or more.

Will the larch timber change colour over time?
Larch may naturally weather to a silver-grey tone if left untreated. This is a normal process and does not affect structural integrity.