Block driveway with a charcoal drainage channel
Every new hard surface has to deal with the water it stops soaking away. On this Gloucester driveway the answer was a charcoal channel set just below the field of blocks, running the full length of the drive and taking water away from the house before it can reach the threshold.
Key facts
- Town
- Gloucester
- Year
- 2024
- Surface
- Concrete block paving, herringbone
- Detail
- Charcoal channel with double soldier course
Why does a driveway need a drainage channel?
A paved driveway sheds rain that used to soak into open ground. Under UK planning rules that run-off has to be dealt with on the property, so a channel collects it along the low side and directs it to a soakaway or border rather than out onto the highway.
What is a double soldier course for?
Two rows of blocks laid end-on frame the edge and give the channel a rigid shoulder. It stops the herringbone field creeping sideways under wheel loads and gives every cut block something solid to sit against.
- Edge restraint haunched in concrete below finished level
- Channel set marginally low so water finds it
- Contrasting charcoal blocks so the line reads deliberately
Does the finished level matter at the kerb?
Yes. The drive is brought out to meet the existing footpath level without a lip, so there is no step for tyres and no ponding at the entrance. Getting that transition right is what stops a new drive looking bolted on.
Photographs from this job
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Frequently asked
Will the charcoal blocks fade?
Concrete blocks lighten slightly in their first year as the surface weathers, then stay stable. The contrast with the buff field remains clear.
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