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GEAR
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January 12, 2009 |
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What is the recommended thickness for the coating on a tent floor? |
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What is the minimum recommended thickness for a backpacking-tent floor? Big
Agness Seedhouse SL2 tent has a trail weight of two pounds, 14 ounces, with
a 1,200mm polyurethane floor coating. Should I instead opt for the similar
Seedhouse 2, which has a 1,500mm floor coating but weighs three pounds, 14
ounces?
—Marshall Atlanta, Georgia
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I dont really know if there is a minimum recommended thickness. It
all depends on how much you abuse a tent, and on your tolerance for some
premature wear and the possible need for replacing a tent.
In this case, even the coating for the Big Agnes Seedhouse 2 ($200) is on the light
side. But thats also because its a tent that, while well made and well
designed, is competing a little bit on price. The Marmot Swallow 2P, by
comparison, has 3,000mm floor coating. But it also costs $339.
(An aside: What we are talking about here is not the thickness of the
coating, its how much pressure from a vertical water column the coating can
withstand before allowing leakage. The bigger the number, the taller the
column, the more pressure the material can resist.)
Obviously, a floor with a lighter coating can save weight, all other things
being equal. Marmots Aura 2p ($299) weighs about half of what the Swallow
weighs. Its also smaller, has a lighter (and cooler) mesh fly, and uses
various other weight-saving strategies. But it still has a 3,000mm floor.
Myself, I wouldnt agonize too much over it. What really helps is to get a
roll of 4mm clear plastic at the hardware store. Cut yourself a piece that
is slight smaller than the footprint of the tent, and then pitch the tent
atop that. That saves a ton of wear as you grind the tent into the dirt
while sleeping. And there is a very small weigh penalty. Just make sure none
of the ground cover sticks out from under the tent, as otherwise it will
catch rainwater and funnel it beneath the tent.
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