Description
The Planed Larch Lean-To Pergola with Open Roof is a smart, space-efficient solution for creating a bright, functional outdoor area that connects seamlessly to an existing wall. Designed to maximise natural light while still offering structural presence, this open-roof lean-to is ideal for plant-growing spaces, sheltered walkways, or relaxed seating areas that shouldn’t feel enclosed.
Built from smooth planed larch and engineered with heavy-duty timbers, this pergola delivers long-term durability with a clean, contemporary finish. The lean-to structure makes practical use of wall-adjacent space, helping you enhance patios, garden walls, or house elevations without taking up unnecessary room.
Open Roof Lean-To Design
The open roof design allows sunlight and airflow to pass through freely, creating a light and welcoming environment beneath.
This makes it particularly well suited to climbing plants, green walls, or garden zones where brightness is essential. The lean-to format adds stability while keeping the structure visually open and uncluttered.
Smooth Planed Larch Timber
Crafted from smooth planed larch, this pergola offers a refined appearance with excellent outdoor performance. Larch is naturally resilient and, when pressure treated, provides strong resistance against rot, moisture, and general weather exposure.
The planed finish gives the pergola a premium look that suits both modern and traditional settings.
Why this lean-to pergola works so well
Open roof design
Allows maximum light penetration and airflow, perfect for planting, walkways, or bright seating areas.
Lean-to structure
Fixes neatly against an existing wall, making efficient use of space and improving overall stability.
Heavy-duty 6" x 6" posts with 4" x 2" beams
Creates a strong, rigid frame designed for long-term outdoor use.
Pressure-treated throughout
All components are fully pressure treated to protect against rot, moisture, and insect damage.
Supplied in kit form
Delivered with all fixings and clear instructions, making installation straightforward for DIY or professional installers.
Bespoke sizing available
Allows the pergola to be tailored precisely to your space, avoiding compromise on layout or coverage.
Important information
If a waterproof membrane is ordered, it will supplied pre-cut to match the size of your pergola roof.
Fascia boards are not included as standard but are available to purchase separately.
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
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Available lengths: 2.4m (8ft) up to 6.0m (20ft)
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Available widths: 1.8m (6ft) up to 3.6m (12ft)
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Total height: 2850mm
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Post height: 2320mm
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Post size: 145mm x 145mm
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Corner brackets: 95mm x 45mm
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Roof overhang (front): 400mm
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Roof overhang (side to posts): 600mm
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Timber: Smooth planed larch
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Treatment: Fully pressure treated
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Fixings: All fixings included*
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Weight: 300kg
FAQs
What is a lean-to pergola?
A lean-to pergola is a structure designed to attach directly to an existing wall, using that wall for support. This creates a stable, space-efficient outdoor feature that integrates neatly with a building.
How does a lean-to pergola differ from a standard pergola?
A lean-to pergola is wall-mounted on one side, while a traditional pergola is freestanding and supported entirely by posts. Lean-to designs are ideal for patios and wall-adjacent spaces.
Is the timber suitable for outdoor conditions?
Yes. All structural timber components are fully pressure treated to help protect against rot, moisture, and insect damage, ensuring long-term durability outdoors.
Can this pergola be made to custom measurements?
Yes. In addition to the standard sizes available, bespoke options can be produced to suit specific wall lengths or garden layouts.
Do lean-to pergolas usually require planning permission?
Many lean-to pergolas fall under permitted development rules, but regulations can vary depending on location, size, and property type. Checking with your local authority is recommended before installation.
Installation
Is the lean-to pergola delivered fully assembled?
No. The pergola is supplied in kit form to allow for easier delivery and handling. Detailed instructions are provided to support straightforward assembly.
Are all fixings included with the pergola kit?
Yes. All fixings required for standard installation are included in the delivery.
Can this pergola be installed as a freestanding structure?
No. For safety and long-term stability, the pergola must be securely fixed into the ground and attached to a solid wall 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. Applying a UV-protective finish is recommended to help maintain appearance.
How often should the pergola be maintained?
Routine maintenance every 6–12 months is advised. This includes checking fixings, cleaning the timber, and reapplying protective treatments as required.
How long is this pergola designed to last?
With correct installation and regular maintenance, the pergola is designed to provide reliable outdoor use for 10–20 years or more.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Request Samples
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Some of Our Service Reviews
This company deserves more than 5 stars
This company deserves more than 5 stars! Brilliant help & communication by the staff there. My purchase was delivered the next day. can't fault them at all. Thank you
Date of experience: 21 February 2024
Made up with the cladding and…
Made up with the cladding and corrugated roof sheets
Delivered early which was a bonus
All the sheets were not damaged
And l must say cheapest around
Spot on
Will defo use again
Date of experience: 17 October 2023
Cladding
Very pleased with my grey composite cladding. Staff helpful, free samples received, confirming a good product at a fair price, leading to my purchase.
Date of experience: 11 June 2023
Help with my new garage roof!
Trade Warehouse could not have been more helpful. They very patiently guided a roofing newbie through all of the stuff I would need to do the job and provided helpful tips along the way. It's rare to find a company offering such a fantastic level of customer service as standard. I would highly recommend them and will certainly use them again.
Date of experience: 23 August 2023
Garden Storage
My contractor (Charlie Keep) recommended you to me so I could order the materials online for delivery direct to my home. These were for a project to construct a Garden Storage Area. The materials were perfect and the whole process was simple and slick with materials delivered on time and very well packaged. Charlie has since completed the project & I am very happy with the outcome.
Date of experience: 20 August 2023
Right product, right price, right delivery.
Right product, right price, right delivery. Sure, it was only one length of cast iron guttering but they took the order seriously, packed it well and kept me updated on delivery. And when I opened the very good packaging I found it was exactly what I had wanted. How can you do better!!
Date of experience: 31 January 2023
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Date of experience: 12 September 2023
It was exactly what I wanted
It was exactly what I wanted. Arrived in good order
Perfect
Date of experience: 16 September 2023
Straight forward and helpful with…
Straight forward and helpful with making the order. Delivery guy was friendly and was helpful in bringing the sheets into the back yard (was only a few). Really happy and would highly recommend!!!
Date of experience: 27 August 2023
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