Essex,
United Kingdom 
is there a membrain on the market that also has a covering of some bark or other attractive material?
20 Sep, 2010
Answers
Not as far as I'm aware - people use different mulches on top of membrane, varying from shingle to slate to bark chips, so usual procedure is to buy a membrane and then lay your own decorative mulch on top.
20 Sep, 2010
No idea.. sorry. Why don't you google 'membranes'. and take a look at the ranges available?
20 Sep, 2010