Shallow Sub-Base
Cambridge clay expands and contracts seasonally; a thin sub-base lets slabs lift and dip within a year.
Compacted Type 1 Base
A compacted Type 1 sub-base, sized for clay ground, absorbs seasonal movement before it reaches the slabs.
Natural Stone
Indian Sandstone Patios in Cambridge
A natural stone patio that suits your garden’s ground conditions, laid and jointed to last.
- Local Survey Arranged
- Sandstone & Limestone
- Separate Cost Lines
What Goes Wrong
Where Indian sandstone installations fail, and how to avoid it
Uneven Slab Bedding
Slabs from the same pack vary in thickness; a flat mortar bed leaves the surface rocking and uneven.
Individual Slab Bedding
Each slab is individually bedded on a mortar mix so the finished surface sits at a consistent level.
Unsealed Joints
Open joints allow moss and algae to establish quickly through Cambridge’s damp winters, weakening the pointing.
Jointing Compound & Sealer
Joints are raked to a consistent depth, filled with a natural-stone jointing compound, then sealed after laying.
Jet Wash Damage
High-pressure washing strips jointing compound and opens the stone surface to faster staining and moss regrowth.
Correct Cleaning Method
Low-pressure rinsing with a stone-safe cleaner preserves the joints and the sealed surface finish.
Scope of Work
What an Indian sandstone patio installation covers
From ground preparation through to sealing, each element is quoted as a separate line so you know what you are paying for.
Sub-Base Preparation & Excavation
Excavation to the correct depth and a compacted Type 1 sub-base sized for Cambridge clay ground conditions.
Slab Selection & Colour Matching
Colour variants including Raj Green shown as samples before ordering, with thickness checked across the batch.
Mortar Bedding & Laying
Each slab individually bedded on mortar to achieve a consistent surface level and correct drainage falls.
Pointing & Jointing
Joints raked and filled with a jointing compound suited to natural sandstone, not a generic cement mix.
Sealing & Aftercare Advice
A sealer appropriate for the chosen finish applied after laying, with written guidance on ongoing maintenance.
Raj Green Sandstone
Blue-grey tones that work with brick and render.
Drainage Falls
Falls set away from the house at the correct gradient.
Waste Removal
Excavated material and old paving cleared from site.
Why Choose Us
Why Cambridge Patios for Indian sandstone?
We take enquiries from Cambridge homeowners and schedule a survey that covers ground conditions and quotes the full scope of work upfront.
Surveys That Know Cambridge Clay
Every survey accounts for Cambridge clay ground and sizes the sub-base accordingly.
Itemised Quotes, No Hidden Groundwork
Excavation, sub-base, bedding and paving appear as separate lines, no bundled surprises.
Samples Before You Order
The installer shows colour samples including Raj Green before any slabs are ordered or paid for.
Site Survey Arranged for You
We schedule a site visit to assess drainage and ground conditions, and quote the work properly.
Natural Stone Jointing Specified
The jointing compound is suited to sandstone, not a generic cement mix that cracks and stains.
Pricing Estimates
Typical Indian Sandstone Patios Prices
| Job | Typical cost | Typical size |
|---|---|---|
| Small Indian sandstone patio | £1,400-£2,800 | 10m² |
| Standard Indian sandstone patio | £2,500-£5,000 | 20m² |
| Large Indian sandstone patio | £4,500-£8,500 | 40m² |
Common Questions
Indian sandstone patio questions answered
How much does an Indian sandstone patio cost?
Most Indian sandstone patio installations come in at £1,400-£2,800, depending on the area size, slab thickness, and ground preparation needed. Larger patios with complex cuts or significant base work will sit toward the top of that range.
Is Indian sandstone a good choice for a patio?
Yes, Indian sandstone is a well-established patio material. It is naturally textured, available in a wide colour range, and when laid on a properly prepared sub-base it performs well outdoors. Sealing after installation helps it resist staining and extends its lifespan.
Is Indian sandstone suitable for outdoor use in British weather?
Yes, provided it is laid correctly and sealed. Calibrated Indian sandstone at 22 mm or more, bedded on a full mortar bed over a compacted sub-base, handles British rain and frost well. Sealing closes the pores and reduces water absorption, which is the main cause of freeze-thaw damage.
What thickness should Indian sandstone paving slabs be for a patio?
22 mm is the standard minimum for a pedestrian patio. For areas that will take vehicle access or heavy garden furniture, 30 mm slabs are more appropriate. Thinner slabs below 20 mm are more prone to cracking under point loads and are not recommended for full patio use.
Will my Indian sandstone patio be slippery when it gets wet?
A riven or textured surface finish significantly reduces slip risk when wet. Honed or polished finishes are more slippery and are better suited to covered areas. Algae build-up on an unsealed surface increases slip risk over time, which is why sealing and annual cleaning matter.
Can I jet wash Indian sandstone?
Yes, but use a wide fan nozzle at low to medium pressure, no higher than 100 bar. Keep the nozzle moving and avoid holding it close to the surface or pointing it directly at the mortar joints. A gentle annual wash is usually enough to keep the surface clean.
Will jet washing damage Indian sandstone?
High pressure or a narrow nozzle can erode the surface texture and blast out the pointing between slabs. Damage is most likely on unsealed stone or where the mortar joints are already weakened. Low pressure with a wide fan nozzle avoids this. Repointing after damage
Will the colour and finish look the same across the patio?
No, and that is a natural characteristic of sandstone. Each slab carries its own mineral variation, so tone and veining differ across the patio. This variation is part of the material’s appeal, but if you want a uniform look, porcelain is a more consistent alternative. Porcelain patio options
Tell Us About Your Patio Project
Describe the garden, what is down there now and how it drains. We will schedule a survey and quote the work properly.