ninjapuppet wrote:Had my Jannu up in Jagungal over the wekeend. Heaps of condensation dripping all over the outer, but the inner walls were bone dry!
God I love double skin tents during times like this
however the bathtub floor was non breathable, and was soaking wet. the floors go up about 15cm and if anything touched them, it would get soaked too.
I really dont know any way around this, other than wiping it down, but you cant go on doing this all night long. Didnt have my cuben/eVent bivy with me as i thought it was pointless to bring along with a double walled tent.
A tarra is 2 man while Saivo is 3 man.
Saivo quality is better than a VE25 and much easier to set up.
andrewa wrote: My ideal tent would be a 4lb (or lighter) cuben geodesic dome with twin vestibules, both with hoops.....haven't found it yet, but also, haven't been looking.
DannyS wrote:Was the base of the floor wet or just the sides? Were you using a footprint?
RonK wrote:Use the footprint. It will reduce condensation. Permanently attached to my Soulo. Never had a wet floor, even in EnZed in spring.
DannyS wrote:RonK wrote:Use the footprint. It will reduce condensation. Permanently attached to my Soulo. Never had a wet floor, even in EnZed in spring.
Yeah I think what RonK says is right, it would definitely reduce the convective process described by Scottyk.
Scottyk wrote:foot print would make no difference
Orion wrote:DannyS wrote:RonK wrote:Use the footprint. It will reduce condensation. Permanently attached to my Soulo. Never had a wet floor, even in EnZed in spring.
Yeah I think what RonK says is right, it would definitely reduce the convective process described by Scottyk.
I don't understand. Warm, moist people inside and a non-permeable fabric that's cold --> condensation and eventual pooling of water. Add a groundsheet and what changes?
Scottyk wrote:Everyone has anecdotal evidence of "this time when I was here and the weather was this....."
Although the observations made are valid they are only valid for that very specific set of circumstances. It helps to think a little broader.
If the foot print sealed any gap between the tent fly and the ground then it would help to stop it from happening, yes. But that would have to be a very good seal, like say a zipper with a flap behind it. if there was even a 5mm average gap then the air will get in and the convention process will start and continue. Remember that the moisture is not coming from outside the ten but inside, its only the cold air circulating past then tent bathtub wall that lets it condensate on the sides.
So to stop it you will have to stop this this air moving past the wall. Most tents are designed with this as a feature as it lessens the condensation from forming on the inside of the tent fly, that's why Hilleberg have the excellent vents at the top. If you close this all up the the humidity level rises from your own moisture vapour, rather than venting out the top with the vent and convective flow the tent fly will be nice and cold and that's where it will condense and you will wake up with drips all over you.
So have a conducted controlled experiments of a tent with or without a foot print corresponding with moisture levels on the inside of bathtub floors? No
Do I need to to understand the processes at play? No
Scottyk wrote:If the foot print sealed any gap between the tent fly and the ground then it would help to stop it from happening, yes.
RonK wrote:Scottyk wrote:Using a footprint covers the ground under the fly and prevents humidity rising from damp earth or vegetation - definitely helps to reduce condensation, as I observed when once at a nice grassy spot I failed to use my footprint. As mentioned I leave it permanently attached now.
RonK wrote:Scottyk wrote:If the foot print sealed any gap between the tent fly and the ground then it would help to stop it from happening, yes.
The subject of discussion is Hilleberg 4-season tents. The fly reaches all the way to the ground, as can be seen in photos posted above - there is no air gap, and air does not enter under the fly. That after all is the purpose and design of a 4-season tent. In warmer weather I've sometimes resorted to putting items such as nalgene bottles under the fly hem of my Soulo to allow a little more ventilation.
Using a footprint covers the ground under the fly and prevents humidity rising from damp earth or vegetation - definitely helps to reduce condensation, as I observed when once at a nice grassy spot I failed to use my footprint. As mentioned I leave it permanently attached now.
In fact, most condensation comes from the water vapour exhaled by the occupants, hence more bodies are likely to produce more condensation. It doesn't help if you have damp and sweaty clothing, wet boots, socks or gear in the vestibules either.
nq111 wrote:RonK wrote:Scottyk wrote:Using a footprint covers the ground under the fly and prevents humidity rising from damp earth or vegetation - definitely helps to reduce condensation, as I observed when once at a nice grassy spot I failed to use my footprint. As mentioned I leave it permanently attached now.
Yeah, fire the stove up in the vestibule the tent warms up nicely and the amount of water that steams up from the ground and wet grass seems to be considerable.
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