Why Putney properties get standing water and waterlogged ground
Putney runs from riverside mansion blocks and newer flats up the hill to Victorian and Edwardian terraces and larger detached homes towards the heath. Mansion blocks bring shared stacks and communal drainage into the picture.
Standing water against a building is a slow problem rather than a dramatic one. It saturates the ground next to the wall, and over a season or two that shows up as damp inside.
The lower riverside streets deal with a high water table and tidal influence, so surface water clears more slowly and any restriction shows sooner. Higher up, mature trees and older clay laterals are the more common cause.
Our approach in Putney
We survey the ground and the fall first, because both determine whether a French drain will work at all.
- Survey the site, the levels and the subsoil to confirm where water is collecting
- Establish a viable discharge point, whether a surface water drain, a soakaway or a watercourse
- Excavate the trench to the depth and fall the design requires
- Lay geotextile membrane, perforated pipe and washed aggregate in the correct order
- Reinstate the surface and check the run under a controlled flow of water
In mansion blocks the drainage is communal, so we work with the managing agent and identify which flat the fault relates to. That avoids charging one leaseholder for a building-wide problem.
Signs it needs attention now
- Ground that stays waterlogged for days after rain
- Water pooling against an external wall or across a patio
- Damp appearing on an internal wall at low level
- A lawn that has become moss-heavy and will not dry out
- A newly paved area with no drainage provision
What we see most often in Putney
- Communal stacks in mansion blocks restricted by grease and wipes
- Slow-clearing surface water in the lower riverside streets
- Root ingress into older laterals in the larger gardens towards the heath
Putney work covers riverside mansion blocks with communal drainage, family houses up the hill, and a number of managed developments. In blocks we deal with the managing agent and identify whether the fault is communal before any leaseholder is charged.
Equipment and what happens afterwards
A French drain is only as good as its components, so we use geotextile membrane, perforated pipe and washed aggregate rather than pit-run material that will clog. The membrane is what keeps fine soil out of the stone, and it is the thing most often left out of a drain that silts up within two seasons.
We test the finished run with a controlled flow of water before reinstating the surface, so you can see it discharging rather than take our word for it. We explain where the water goes and what to keep clear, and we are honest when a French drain is not the right answer and the real problem lies somewhere else.
What french drains cost in Putney
French drain installations are quoted after a site visit, because the price depends on the run length, the depth and where the water can be taken. You get a fixed price up front rather than an hourly rate, which means a difficult job in Putney does not become an open-ended one.
Areas we cover around Putney
Putney sits within our core coverage, taking in SW15 across Wandsworth. Average response is 75 minutes, and we operate in Barnes, Wandsworth, Fulham and Richmond too, which helps when a drain run is shared between properties in different streets.