Whats a minimal hydrostatic head

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redefined_cycles
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Whats a minimal hydrostatic head

Post by redefined_cycles » Mon Jul 22, 2019 3:10 pm

I think Stu mentioned once whats the minimal for something to be classed reliably as waterproof... Any knows or cares to guess the answer... The jacket I'm looking at is 8000mm

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ScotRoutes
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Re: Whats a minimal hydrostatic head

Post by ScotRoutes » Mon Jul 22, 2019 3:13 pm

Funny - I was just looking at this recently

https://www.ultralightoutdoorgear.co.uk ... head-i1245

redefined_cycles
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Re: Whats a minimal hydrostatic head

Post by redefined_cycles » Mon Jul 22, 2019 3:22 pm

Thanks Colin... I think the article would suggest that my option of 8000 wouldnt reallly be suitable for an extended downpour :???: I'm seeking something to handle driving rain for extwnded periods

My Lowe Alpine jacket the other day felt a bit 'boil in the bag' and possibly time to move it on soon in case anyone has any bright ideas to give it a new lease of life :smile:

My first and goto option would be (obviously) the BB staple Columbia Outdry but expensive at the mo...

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Bearbonesnorm
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Re: Whats a minimal hydrostatic head

Post by Bearbonesnorm » Mon Jul 22, 2019 3:43 pm

1500 as a minimum for a material to be considered 'waterproof'.
#corporate shill for hire

Tonto
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Re: Whats a minimal hydrostatic head

Post by Tonto » Mon Jul 22, 2019 3:57 pm

I can give you a review of the Columbia outdry tomorrow Shafiq.
It may contain a few swearwords... :cry:

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Alpinum
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Re: Whats a minimal hydrostatic head

Post by Alpinum » Mon Jul 22, 2019 4:05 pm

Bearbonesnorm wrote:
Mon Jul 22, 2019 3:43 pm
1500 as a minimum for a material to be considered 'waterproof'.
For a tent.
But also for a jacket?

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Bearbonesnorm
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Re: Whats a minimal hydrostatic head

Post by Bearbonesnorm » Mon Jul 22, 2019 4:29 pm

For a tent.
But also for a jacket?
For material, what someone chooses to make from it is nowt to do with me :wink:
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voodoo_simon
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Re: Whats a minimal hydrostatic head

Post by voodoo_simon » Mon Jul 22, 2019 5:56 pm

I swear the marmot rep of many moons ago told me it should be about 10k in the ‘real world’, 10K would be on for sitting in a puddle and staying dry.

The minimum uk standard changes depending upon the season, think it was 1.5k for summer and 3 for winter.

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Bearbonesnorm
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Re: Whats a minimal hydrostatic head

Post by Bearbonesnorm » Mon Jul 22, 2019 5:58 pm

The minimum uk standard changes depending upon the season, think it was 1.5k for summer and 3 for winter
Odd, is water somehow wetter in winter? :wink:
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redefined_cycles
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Re: Whats a minimal hydrostatic head

Post by redefined_cycles » Mon Jul 22, 2019 6:03 pm

Bearbonesnorm wrote:
Mon Jul 22, 2019 5:58 pm
The minimum uk standard changes depending upon the season, think it was 1.5k for summer and 3 for winter
Odd, is water somehow wetter in winter? :wink:
Maybe higher density in winter so particles more tightly packed and don't 'fluid' through the pores of the material? :geek:

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Bearbonesnorm
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Re: Whats a minimal hydrostatic head

Post by Bearbonesnorm » Mon Jul 22, 2019 7:18 pm

Maybe higher density in winter so particles more tightly packed and don't 'fluid' through the pores of the material? :geek:
Wouldn't that then mean that you'd need a lower HH in winter.
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ScotRoutes
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Re: Whats a minimal hydrostatic head

Post by ScotRoutes » Mon Jul 22, 2019 7:23 pm

Summer rain is that fine, misty stuff falling from the sky.

Winter rain is heavy, wet stuff driven by gale force winds.


:lol:

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Re: Whats a minimal hydrostatic head

Post by voodoo_simon » Mon Jul 22, 2019 7:49 pm

More rain in the winter, I dunno why :oops:

Quick google search and it’s looks like the MOD set their target at 800mm :shock:

Can’t find anything via the government website on minimal standards, just blogs after blogs giving different results

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Re: Whats a minimal hydrostatic head

Post by redefined_cycles » Mon Jul 22, 2019 8:13 pm

Bearbonesnorm wrote:
Mon Jul 22, 2019 7:18 pm
Maybe higher density in winter so particles more tightly packed and don't 'fluid' through the pores of the material? :geek:
Wouldn't that then mean that you'd need a lower HH in winter.
Oh yes... it must've got twisted somewhere getting to my brain from the phone... the investigation continues :-bd

lune ranger
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Re: Whats a minimal hydrostatic head

Post by lune ranger » Mon Jul 22, 2019 10:59 pm

In reality it’s all academic anyway.
If you ride for more than a few hours in proper rain you will get wet.
Water will hose in through all the holes your head arms and body stick out through.
You will sweat yourself wet.
Water will seep in through all the little thorn holes and scuffs.
If it has put zips or other ventilation water will come through there as well.
Be prepared to get wet! :|

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