Proper drainage separates a successful patio from a waterlogged disaster. In Stockport’s climate, getting the slope and drainage right from day one prevents costly repairs later.

Your patio needs a minimum fall of 1 in 60 away from the house. This means a 6 metre patio drops 10 centimetres from house to garden. Anything less risks water pooling against your foundations.

Here’s what affects drainage costs:

• Basic fall to lawn or borders: £15 to £25 per square metre extra
• Channel drains along patio edges: £40 to £60 per linear metre
• Soakaway construction: £300 to £800 depending on size and depth
• French drains for problem areas: £35 to £50 per linear metre

When drainage systems require professional installation and expertise, costs may vary significantly based on site conditions.

Clay soil around Stockport makes drainage planning crucial. Water sits on clay rather than soaking through. Budget an extra £200 to £500 for improved sub base drainage on clay ground.

Channel drains work well where patios meet house walls. They collect surface water and direct it to safe drainage points. Expect to pay £200 to £400 for a typical three bedroom house frontage.

Soakaways handle water from channel drains and downpipes. Building regulations require them at least 5 metres from foundations. Factor this distance into your drainage budget and design.

Quality drainage costs more upfront but prevents structural problems. Poor drainage can undermine patio bases, cause settlement, and create damp issues in adjacent buildings. The repair costs far exceed proper installation.