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Recommendations on bivy tent
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<blockquote data-quote="jmden" data-source="post: 844511" data-attributes="member: 1742"><p>Litehiker, </p><p></p><p>I have not felt the need for the liner for the Single Rainbow at all, that's why I didn't include it.</p><p></p><p>The Rainbow can be made freestanding with the use of trekking poles if one thinks that is important.</p><p></p><p>The snow load capability of the Rainbow is very high due to the fact, if the need is warranted, the Rainbow is designed to use trekking poles, one on either side veritcally oriented, to further support the tent. Watch the video. That gives you the pole the tent comes with and two trekking poles giving vertical support to the structure. Another thing in regards to snow and the material that Henry uses (because I've gone through several hundred yards of the exact same material with the structures I make)--it is so slick with it's silicone coating that snow does not typically load near the top of the structure (super wet stuff can adhere, especially if rain has recently fallen and then turned to ice on the material...these 'bumps' of ice give the snow something to pile up on) but slides down the sides collecting around the perimeter of of the structure. This will still load the structure, it just takes more of it to get to that point. As with any tent when it's snowing, remaining very aware of how much snow is coming down and being vigilant to shake it off or otherwise remove it carefully from the structure is very important for possible structural reasons as well as comfort in two areas: 1) weighted snow at the perimeter effectively reduces the interior space of the tent, and 2) many tents are completely reliant on the airflow around their perimeter at ground level for ventilation. Take this away and you end up living in a ziploc bag, so to speak. Moisture builds up rapidly. I always look for tent designs that have good adjustable ventilation features near their peak as well as the ground level perimeter. Mine certainly do.</p><p></p><p>All this being said, I recently had an experience with the DOUBLE Rainbow that I wasn't fond of. A liner may have been helpful here... In near/at freezing temps in the long term rain at higher elevation, with TWO people in the tent (difficult ventilation/condensation environmental conditions), the ventilation inherent in the design was not able to keep up with the situation. I've been in somewhat similar situations in my single Rainbow with just me in it, obviously, and had very little problem. The Double Rainbow does not have any more ventilation ability than the Single Rainbow and I think in those conditions with twice the condensation making people in it, it just could't hack it. All that happened was more condensation on the roof than I'd like to see, but with two kids in that tent that weren't as careful and understanding as adults, they brushed up against the roof and had moisture from condensation on them and gear in no time. If two careful adults were in it, probably would've gone better. It's already sold to a buddy and a high quality Marmot double wall tent purchased in it's place. Might be heavier, but will keep 2 members of my family happier if we were to be in those conditions again while on a multiday hike. Just an fyi. The Double Rainbow would be palatial for 1 person and at 2.5 pounds, very hard to beat with two doors and 2 vestibules. It's fine for 2 folks in not so cold, prolonged rainy conditions as well.</p></blockquote><p></p>
[QUOTE="jmden, post: 844511, member: 1742"] Litehiker, I have not felt the need for the liner for the Single Rainbow at all, that's why I didn't include it. The Rainbow can be made freestanding with the use of trekking poles if one thinks that is important. The snow load capability of the Rainbow is very high due to the fact, if the need is warranted, the Rainbow is designed to use trekking poles, one on either side veritcally oriented, to further support the tent. Watch the video. That gives you the pole the tent comes with and two trekking poles giving vertical support to the structure. Another thing in regards to snow and the material that Henry uses (because I've gone through several hundred yards of the exact same material with the structures I make)--it is so slick with it's silicone coating that snow does not typically load near the top of the structure (super wet stuff can adhere, especially if rain has recently fallen and then turned to ice on the material...these 'bumps' of ice give the snow something to pile up on) but slides down the sides collecting around the perimeter of of the structure. This will still load the structure, it just takes more of it to get to that point. As with any tent when it's snowing, remaining very aware of how much snow is coming down and being vigilant to shake it off or otherwise remove it carefully from the structure is very important for possible structural reasons as well as comfort in two areas: 1) weighted snow at the perimeter effectively reduces the interior space of the tent, and 2) many tents are completely reliant on the airflow around their perimeter at ground level for ventilation. Take this away and you end up living in a ziploc bag, so to speak. Moisture builds up rapidly. I always look for tent designs that have good adjustable ventilation features near their peak as well as the ground level perimeter. Mine certainly do. All this being said, I recently had an experience with the DOUBLE Rainbow that I wasn't fond of. A liner may have been helpful here... In near/at freezing temps in the long term rain at higher elevation, with TWO people in the tent (difficult ventilation/condensation environmental conditions), the ventilation inherent in the design was not able to keep up with the situation. I've been in somewhat similar situations in my single Rainbow with just me in it, obviously, and had very little problem. The Double Rainbow does not have any more ventilation ability than the Single Rainbow and I think in those conditions with twice the condensation making people in it, it just could't hack it. All that happened was more condensation on the roof than I'd like to see, but with two kids in that tent that weren't as careful and understanding as adults, they brushed up against the roof and had moisture from condensation on them and gear in no time. If two careful adults were in it, probably would've gone better. It's already sold to a buddy and a high quality Marmot double wall tent purchased in it's place. Might be heavier, but will keep 2 members of my family happier if we were to be in those conditions again while on a multiday hike. Just an fyi. The Double Rainbow would be palatial for 1 person and at 2.5 pounds, very hard to beat with two doors and 2 vestibules. It's fine for 2 folks in not so cold, prolonged rainy conditions as well. [/QUOTE]
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