DDEckerslyke said:Do waterproofs
need maintenance? They sometimes try to sell me some waterproofing treatment
but I'm not sure about whether to buy and/or use it.
The waterproofing on typical modern waterproofs comes from a "breathable
waterproof" layer, either a laminate or coating. These will keep water
out but will let vapour (i.e., your post-evaporation sweat) move
through. Though that's nice in principle, in practice they don't let
out vapour at the same rate active folk produce it and it's further the
case that the ability to shift vapour goes down if the outer face of the
garment is soaking wet (which happens in the rain at times... ;-)). To
try and stop the outer surface "wetting out" and restricting the
breathability, a treatment is washed in or sprayed on that encourages
the water to bead up into droplets. Eventually this will be overcome in
persistent rain, and the speed with which it will be overcome is
proportional to the age of the treatment which is why people renew them.
Note that the treatments do /not/ waterproof the garment (the membrane
or coating layer applied to the main garment fabric does that), but help
it to vent vapour. If a jacket never has water beading on its surface
then it's time to redo the treatment, if it's actually physically
leaking through holes it's time for a new jacket and these treatments
won't help you.
Quoted message said:How do the cyclists here keep dry in the rain?
Staying indoors works remarkably well, I find...
Having said that, a decent waterproof is worth having as it keeps the
worst off and ensures you stay warm, if not actually completely dry.
But in driving, persistent rain you will get wet. The only garment that
will keep you /really/ dry in Proper Rain over any length of time is a
divers/paddlers dry-suit. I'd sooner get wet than cycle in one of
those, even if I had one of ~£700 good breathable ones for my paddling
activities.
Quoted message said:Any help on this specifically, or cycling in the rain in general, gratefully
received.
If you've not got mudguards with flaps already then they are /well/
worth having.
Pete.
--
Peter Clinch Medical Physics IT Officer
Tel 44 1382 660111 ext. 33637 Univ. of Dundee, Ninewells Hospital
Fax 44 1382 640177 Dundee DD1 9SY Scotland UK
net [email hidden] http://www.dundee.ac.uk/~pjclinch/