How to Choose a Patio Installer in Sussex: Sub-Base, Falls, Drainage and the Details Under the Slabs

If you need a patio installer in Sussex, compare the excavation, sub-base, falls and drainage before you compare the paving brand or price per square metre.

The slabs are what you see.

The layers underneath are what stop the finished patio becoming uneven, loose or badly drained.

Start with the existing site

Tell the installer what is there now:

• soil;
• lawn;
• old slabs;
• concrete;
• decking;
• gravel;
• mixed surfaces.

Also point out:

• existing drains;
• manholes;
• air bricks;
• door thresholds;
• steps;
• retaining walls;
• slopes.

A patio design needs to fit around the building, not just fill a rectangle.

Excavation determines the finished level

Ask how much is being excavated and why.

The build-up needs enough depth for:

• sub-base;
• bedding;
• paving.

But finished level matters just as much.

A patio that ends up too high can create problems around:

• damp-proof course;
• thresholds;
• air bricks;
• neighbouring surfaces.

Ask the installer to explain the proposed level before work starts.

Compare the sub-base specification

A quote saying:

“Prepare base”

does not tell you much.

Ask:

• what material;
• approximate compacted depth;
• how it is compacted;
• whether geotextile is used where appropriate;
• what happens if soft ground is found.

The answer can vary with site and loading.

You are looking for a considered build-up, not one universal depth copied into every quote.

Falls and drainage should be visible in the plan

Ask:

“Where will rainwater go?”

The answer should make sense.

Possible solutions can involve:

• falls across the paving;
• drainage channels;
• permeable borders;
• existing drainage;
• other site-specific arrangements.

The patio should not simply shed water towards the house because that is the easiest direction to lay.

Porcelain, sandstone and other paving need different handling

Tell the contractor the product before final pricing.

Different materials can change:

• cutting;
• bedding;
• priming;
• jointing;
• handling;
• edge finish.

Large porcelain slabs may need different tools and installation methods from traditional concrete flags.

Ask to see previous work using the material you intend to buy.

Jointing is part of the specification

Agree:

• joint width;
• jointing product/mortar;
• colour;
• finish.

The joints affect both appearance and maintenance.

Do not wait until the patio is laid to decide what colour jointing will surround every slab.

Edges stop the patio looking unfinished

Ask how exposed edges are restrained and finished.

Depending on the design, this may involve:

• kerbs;
• setts;
• mortar haunching;
• adjacent beds;
• walls.

At steps or level changes, agree the visible edge detail before installation.

Access and waste can change the cost significantly

Excavating a patio produces a surprising volume of spoil.

Tell the installer if access is:

• through the house;
• via a narrow side path;
• up/down steps;
• through a shared passage.

Ask whether the quote includes:

• excavation spoil;
• old paving;
• packaging;
• skips/grab removal.

A project with no machine access can be much more labour-intensive.

Existing paving problems should influence the new design

If the old patio:

• sank;
• rocked;
• held standing water;
• cracked;
• moved at the edge;

ask why.

Replacing the visible surface without addressing the failure mechanism can repeat the problem.

The installer may identify poor base preparation, drainage, edge restraint or ground movement.

Patios near drainage and inspection covers

Do not bury essential access.

Ask how:

• manholes;
• rodding points;
• gullies;
• drains;

will be kept usable.

Recessed covers can improve appearance where appropriate, but the access still needs to work.

Landlords: aim for robust and repairable

For rental property, practical choices matter.

Consider:

• slip characteristics appropriate to use;
• easy-clean surfaces;
• replaceable products;
• straightforward joints;
• simple drainage.

Keep spare slabs if possible.

If one slab is damaged later, having a matching replacement is useful.

Patio installer, landscaper or groundworker?

A dedicated patio installer can be ideal for a defined paving project.

A landscaper may be better if the patio is part of a complete garden redesign.

A groundworker may be relevant where extensive excavation, drainage or structural ground work dominates.

Thresholds deserve special attention

A patio often meets the house at a door.

Ask how the finished paving level relates to:

• damp-proof level;
• door threshold;
• drainage channel;
• air bricks;
• existing steps.

Raising paving simply to avoid excavation can create poor details around the building.

If a level-access threshold is part of the design, it should be considered deliberately rather than improvised at the end.

Choose the paving after you understand the maintenance

Different surfaces age differently.

Before choosing only by showroom appearance, ask about:

• staining;
• sealing;
• algae;
• pressure washing;
• joint maintenance;
• colour variation;
• replacement availability.

Natural stone, porcelain and concrete products can all work well, but they do not have identical maintenance needs.

For a rental property or high-use garden, durability and ease of cleaning may matter more than the most fashionable finish.

Using TradeKind

You can browse Sussex patio installers or post the job.

A useful brief might say:

“Approx. 35 m² patio in Crawley. Existing concrete flags to remove. Interested in porcelain. Garden slopes slightly towards house and currently holds water after heavy rain. Side access approx. 900mm.”

That immediately tells the installer that drainage and access need thought.

Before accepting a quote

Confirm:

• excavation;
• sub-base;
• bedding system;
• final levels;
• falls/drainage;
• paving product;
• edge detail;
• jointing;
• waste;
• access;
• extras if poor ground is found.

A patio should be judged from the ground up, not from the brochure down.