On 5 Apr, 17:24, Sacha wrote:
On 2010-04-05 17:20:20 +0100, Gillian Hall said:

Dear all,

We are in the process of building a house and, in order to comply with
local building regulations, have had to construct an enormous soakaway
in the garden to drain the roof. This is of the egg crate type covered
with a membrane which must not be damaged by roots or cultivation. It
is approximately 400 mm down. This despite the fact that we are at the
top of a hill on free draining soil. Does anyone have any experience
of these - is there any alternative to grassing or paving the fairly
sizable area over it? We are keen gardeners and any ideas would be
appreciated.

Gill Hall

Pots and interesting containers? *Or perhaps something really
low-growing like Lamium or Lysimachia nummularia, as long as it can't
dry right out. *If it's a sunny area, could you plant low growing herbs
like thymes, which are evergreen?
--
Sachawww.hillhousenursery.com
Shrubs & perennials. Tender & exotics.
South Devon

Sounds just the place for decking or a paved area layed on sand /
gravel so it could be lifted easily if required..
David Hill