Natural Resources Wales
Natural Resources Wales guidance says only clean water should enter surface-water drains.
Read the source →Wales, Wales
For window cleaning in Cardiff, begin with window count, storeys, frames and access below the glass. One consistent brief lets responding providers price the same job instead of making different assumptions.

The Cardiff brief
Focus on window count, storeys, frames and access below the glass. The key comparison is whether the brief covers exterior glass only, frames and sills, or conservatory glazing as well.
Evidence before method
These sources support the planning questions on this page. They do not prove that a particular method suits an unseen property.
Natural Resources Wales guidance says only clean water should enter surface-water drains.
Read the source →HSE guidance says work at height should be planned and suitable equipment selected for the task.
Read the source →Questions for Cardiff
Show the full elevation and any extension, conservatory or restricted ground access. The responding provider can then explain the access method proposed for that property.
Washom does not publish an unsupported Cardiff average. Give each provider the same photographs, measurements, condition and access notes, then compare what each total includes.
No. Submit the window cleaning brief and Washom will check for suitable independent-provider options. Availability depends on the job and location.
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Your next step
Share photographs, surface condition and access once. Washom will check suitable independent-provider options for this job.