How We Prepare the Ground for Patios and Paths: Behind the Scenes at Plex

Ever wondered what really goes into preparing a professional patio or garden path? In this post, we take you behind the scenes at Plex to show the full process — from excavation to sub-base compaction — that ensures every surface stays level, strong, and long-lasting. Learn the science, precision, and materials that make the difference between a short-lived patio and one that lasts decades.

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Excavation and Levelling

Every Plex Group project starts by stripping turf, topsoil, and organic matter to a depth of 150–200mm. We check for underground services, remove roots and debris, then set precise drainage falls using laser levels — a minimum 1:60 gradient directing water away from buildings. In clay-heavy areas like Evesham, Cheltenham, and Moreton-in-Marsh, getting this right is non-negotiable.

Sub-Base and Compaction

MOT Type 1 crushed aggregate is laid in 50mm layers and compacted with a vibrating plate until firm. A geotextile membrane may be placed beneath to prevent weed growth and sub-base migration into clay soil. In areas prone to heavy rainfall across Gloucestershire and Warwickshire, linear drainage channels or soakaways are installed at this stage.

Bedding and Installation

A sharp sand bedding layer of 30–50mm is screeded to millimetre accuracy before slabs are laid. Porcelain and natural stone are set on a semi-dry mortar bed; block paving uses flexible jointing. Polymeric grout seals the joints for weed resistance and long-term durability — the final step before handover.

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Built for Clients Like You

Shared front garden delivered in Vauxhall London

A 10-day front garden transformation featuring gravel driveways, raised planters, hedge planting and full irrigation installation for a London property.

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Concrete Yard to Modern Multi-Level Space

Modern garden transformation in Cheltenham. Multi-level design with limestone paving, maximising space in a small terraced garden.

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Neglected to Timeless

A neglected garden reimagined into a stunning rustic retreat, featuring reclaimed brickwork, a charming patio, and vibrant planting—blending timeless character with thoughtful design.

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Cheltenham Garden Modernisation

A complete garden overhaul in Cheltenham, transforming an overgrown, rat-infested space into a sleek, low-maintenance outdoor oasis with porcelain paving, integrated lighting, and a rat-proof brick wall.

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The Plex Group Process

  • Site assessment and soil type evaluation
  • Excavation to correct depth with drainage falls set
  • MOT Type 1 sub-base compacted in layers
  • Laser-levelled bedding and precision slab installation
How deep should a patio base be?

Most patios require 150–200mm of excavation to allow a proper sub-base and bedding layer. Soil type and load requirements may increase this depth.

Do I need drainage under my patio?

Yes. All patios need a slight fall (1:60 minimum) directing water away from buildings. Clay soils across Worcestershire and Gloucestershire make this especially important.

Do you install patios across Gloucestershire and Oxfordshire?

Yes. Plex Group installs patios and paths across Worcestershire, Gloucestershire, Oxfordshire, and Warwickshire, including Cheltenham, Burford, Moreton-in-Marsh, and Stratford-upon-Avon.

How long before I can use my new patio?

Generally 24–48 hours. Mortar joints should be fully cured before placing furniture or heavy items.

Groundwork That Goes the Distance

From Cheltenham courtyards to Burford garden paths, Plex Group's preparation process is what separates a patio that lasts a decade from one that lasts a lifetime. Every layer is engineered, not guessed. Get in touch to start your project.

Conclusion

What's beneath your patio determines how long it lasts. Plex Group prepares every surface to professional standards across Worcestershire, Gloucestershire, Oxfordshire, and Warwickshire.

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