Drainage & Foundations in Cardiff
Sub-surface drainage, concrete pads and bases, foundation preparation and ground stabilisation in St. Mellons, Cardiff and South Wales.

Sub-surface drainage
Sub-surface drainage carries water away from where it causes problems. Standing water on lawns, patios and around buildings often points to a drainage issue that is worth addressing.
- Sub-surface drainage systems
- Drainage solutions to help prevent water pooling
- Ground preparation for drainage runs
The correct solution depends on the property and site conditions, which is why we assess the site first.

Dealing with water pooling
Pooling can come from compacted ground, poor levels, blocked or missing drainage, or run-off from nearby surfaces. We look at the cause rather than applying the same fix everywhere.
- Look for standing water after rain
- Notice damp or soft ground near buildings
- Check whether levels slope towards the house or patio
Reshaping levels may also be part of the answer. See groundworks.

Concrete pads, bases and foundation preparation
Sheds, outbuildings, equipment and extensions all need a stable base. We excavate, prepare and form concrete pads and bases, and prepare ground for foundations.
- Concrete pads and bases
- Foundation preparation
- Excavation and ground stabilisation
When to consider drainage improvements
Water that does not clear
Puddles that remain long after rain has stopped.
Before new patios or lawns
Drainage is easiest to fit before surfaces go down.
Soft or unstable ground
Ground that needs stabilising before building work.
How we work
Enquiry
Describe the problem or the project.
Site assessment
We look at the ground and water flow.
Quotation
Recommended approach and quotation.
Work begins
Excavation, installation or base formation.
Clean-up
Site cleared and tidied.
Drainage and foundation questions
No. The right solution depends on your property, the soil and the site conditions, so we assess the site before recommending anything.
If water regularly collects in your garden, against a building or on a surface, it is worth getting it looked at before it affects other work.
Yes, we prepare and build concrete pads and bases, including the excavation and ground preparation beneath them.
Yes, we carry out excavation and preparation of foundations, along with ground stabilisation where needed.
Send an enquiry, call 07763 596484 or message us on WhatsApp. We will arrange a site assessment.
Send a drainage or foundations enquiry
Fill in the form and we will respond about arranging a site visit and quotation. You can also call, email or message us on WhatsApp.
- Phone: 07763 596484
- Email: shannonjones00@hotmail.com
- Address: 18 Clos Gwern Y Mor, St. Mellons, South Glamorgan, Cardiff, CF30HX