Microcement Outdoor: Patios, Walls and Pool Surrounds

Where this works

• Sound concrete patios where the selected system permits exterior use
• External walls with a compatible background
• Sheltered outdoor living areas with adequate drainage
• Pool surrounds with an appropriate wet-barefoot specification
• Threshold transitions detailed between indoor and outdoor finishes

How we install it

1. 1
   Check exposure and suitability

   Record whether the surface is horizontal or vertical, sheltered or fully exposed, and how people will use it. Confirm the selected product allows that specific exterior application. An interior floor sealer is not automatically suitable outdoors, and a product approved for running water is not necessarily approved for standing water or permanent immersion.

2. 2
   Resolve the patio base and drainage

   A microcement patio needs a continuous, stable supporting surface. Loose paving, rocking slabs and unresolved cracks should not be hidden beneath a thin finish. Check falls, low spots, outlets and the height at doors before decorative work starts. A surface that holds water needs drainage correction, not simply another coat of sealer.

3. 3
   Detail movement and transitions

   An external slab expands and contracts as conditions change. Structural and movement joints remain functional through the finish, including at changes of substrate and building junctions. A visually continuous colour can be maintained without pretending the construction has no joints. Thresholds need particular attention so water is directed away from the interior.

4. 4
   Apply within the weather window

   Preparation, coating and curing must follow the product limits for temperature, moisture and weather exposure. Strong sunshine can dry a coat unevenly, while rain or condensation can affect bonding and protection. The programme needs a suitable dry window and a way to keep the uncured surface clear of water and traffic.

Texture, colour and cleaning outside

A smooth showroom sample is not enough to choose an outdoor floor. Examine a sample with the final protective treatment and texture, considering rain, leaves, mud and footwear. More texture can improve grip but also changes cleaning. UV suitability belongs to the complete specification, not just the pigment colour. Regularly remove grit and organic debris, and use the cleaner approved for the chosen sealer rather than an aggressive patio chemical.

Microcement swimming pool: surround or pool shell?

A pool surround and the inside of a swimming pool are different environments. The surround needs drainage, wet-barefoot grip and compatibility with splashed pool water. The shell remains immersed and needs a system specifically approved for that duty, with its own waterproofing and chemical-exposure requirements. Do not use approval for a patio or shower as evidence of pool-lining suitability. Describe which surface is being considered when requesting advice.

Exterior microcement or another coating?

Microcement gives a fine mineral appearance where the supporting surface and exterior system are suitable. A traffic-bearing resin coating may be more appropriate for ramps, vehicle use or a demanding working surface. For walls, a dedicated exterior decorative finish can be a better match to the background and exposure. Compare these options against the actual use rather than assuming one material should cover the patio, wall and roof.

What determines the project cost?

Preparation, base repairs, drainage corrections, access, protection and the selected system all affect the price. An existing sound slab and a patio built from separate paving units are not equivalent starting points. Ask for the work beneath the visible finish, the joint details and the maintenance requirements to be included in the specification. For an indoor surface continuing towards the garden, review the threshold before either finish is ordered.

Common pitfalls we prevent