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Posted: Tue Mar 17, 2009 8:09 pm
by jliverton
We have a drive that slopes down approx 0.6 m to our front door from the road and we occassionally get water under the front door. We currently have a very worn bitmac drive that needs replacing. We obviously need better drainage gulleys etc but my question is does surface water drain better through bitmac or pavers??
Posted: Tue Mar 17, 2009 9:53 pm
by msh paving
blockpaving does not allow water to pass through once laid and compaced,same as bitmac the only thing allowing water throught is permabile paving as talked about in the main web site http://www.pavingexpert.com/permabl1.htm
or open texture DBM tarmac im shure our tarmac expert dave L will be along to advise you on this MSH 
Posted: Tue Mar 17, 2009 10:04 pm
by lutonlagerlout
its your drains that need sorting not the drive
linear drain through the front of the house should rectify this
LLL
Posted: Wed Mar 18, 2009 9:15 am
by Tony McC
In general terms, bitmac and conventional block paving perform more or less the same when it comes to transporting surface water, but, as LLL says, it's the drainage fittings and falls that need correcting, not the type of paving/surfacing.
Posted: Wed Mar 18, 2009 9:18 am
by Big Phil
if you're looking for permeable asphalt, be careful with conventional recipe (i.e. BS EN) open graded asphalts as many aren't robust enough for vehicle traffic if your drive has a 3 point turning area - damage caused by on-the-spot power steering (probably ok for straight on/straight off) look for proprietary products that are designed with SUDS in mind.