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Tipi

Updates

Sun, January 20, 2008: Added three ways to seal a tipi off rain through the pole junction opening: hood, drip strip and ozan.

Fri, June 22, 2007: Put the "notes" back into the main tipi section, added one new sewing option, and added historic photos of tipi.

Sun, October 2, 2005: Canvas calculation fixed.

Fri, September 16, 2005: Updated infos on Extension: Upgrading Size.

Tue, September 13, 2005: Took my notes out of the page and separated it into the Tipi Notes. Separated the notes from the main tipi page. Added information about tipi extensions.

Fri, September 9, 2005: Added tipi sketch with human height comparison (alike yurt and dome calculators).

Dakota-Sioux: Tipi (or Tepee) - ti to house, pi to use to

The tipi is a beautiful shaped living room, like a cathedral does it rise in the center, the round circle-like floor shape, a sacred space by itself. It is also easy to transport, put up and build; base of nomadic living.


The tipi stands almost as a symbol of native american culture, and it seems unique to the north american continent. The simplicity is obvious, and with poles, a single piece of canvas (plus door cover) and ropes, you build a tipi. The smoke flaps and the interior inlining make it a habitat with an open fire in the middle, but it must be admited to use it in winter-time, it seems less suitable, as the smoke leaves through the roof and junction of the poles, and so the heat, not very optimal or efficient despite of possible fur used to insulate the interior.

The tipi I consider as spring to fall shelter, as the thermal insulation for the winter is quite an overhead and less suitable, unless one uses furr extensively.

The tipi is rather simple to transport, one big one piece canvas for the cover, and the poles, which can become quite long (e.g. > 7m) and an overhead to transport. As it is suggested the poles should be 1 to 1.5m longer than the diameter of the tipi, I personally yet consider 0.50m more sufficient, then a separate cover for the pole junction can be applied so no rain water will leak anymore into the inside of the tipi.

Simplicity
Portability
Size Flexibility
Comfort
Overall (3.0)
The tipi is amazing simple, a set of straight poles and one canvas with an optional inlining; to errect and take down a tipi is simple. The portability is very good, except when you have very long poles. The comfort isn't that great due the reason mentioned, the thermal insulation isn't doable very easy and so a lower rating on the comfort.


2005/06/18 22:48
 
2005/06/18 22:48
 
2005/06/18 23:25
 
2005/11/25 13:39
 


How To Manuals

If you are new to tipi, I recommend following articles to read and study first, before you go ahead and look at my approach below.

Tipi Overview

I used to live (predominatly just sleep at night) in a large tipi (apprx. 6.5m diameter) in spring and summer of 2004, and summer 2005 I've got my own little tipi, and did a small upgrade to extend it to 5m diameter. Here I collected some of my notes and aid for calculating canvas lanes for the main cover.

Tipi Math & Plan

To build a tipi appears a rather simple undertake, but the details are not to be negleted and decide if a tipi is truly useable.


The smoke-flaps, as well the seam (put together with sticks) are usually separate and then attached to the main canvas.

d = diameter of tipi
h = √( d2 - (d/2)2 )
hdoor = 120cm, wdoor = 80-100cm
Afloor = d2 * π / 2
npoles = (d * 2 * π) / 2 / 0.67m (and make it an integer & even)
wlane = width of canvas lanes


Tipi Sketch, Human is 170 cm height

Edit the d field, and optionally wlane and hit "calculate":

d = cm, wlane = cm;

h = cm, Acanvas = m2, npoles = + 2 smoke flap poles

Canvas lanes:
whereas the last lane has m left over

Calculate as one long lane, Alanes tot = m

Hint: In case you measure by yards, feet or inches, 1 yard = 91.44cm, 1' or feet = 30.48cm, 1" or inch = 2.54cm. 1cm = 0.01m, 100cm = 1m

Sewing

Either mark each lane's middle line, e.g. fold it and mark the middle line (the red line in the illustration); then lie all lanes (each one at a time) with the middle line aligned or calculate the offset of the next lanes to the previous one; and consider fix it with needles to have a straight sewing line. The order of next lane under previous lane to have rain run over the seam.


Sewing Seam Options

For adding the lanes, the "flat felled" option is recommended, a slight variant though is featured in some tipi books which I call "strong flat felled" as it's quite similiar yet includes in the first stitch or sew already a complete fold, making it stronger.

Needless to say, for canvas you may choose 300g/m2 at least, if not more - and then an industrial sewing machine is required to stitch the lanes together.

Note: Bought canvas usually shrinks 5%-7%, so by preshrinked canvas or shrink (means wash it) before you cut. Often canvas lanes come with widths of 1m-2m, e.g. 1.60m is a very common width, enter wlane 5-10cm less as you need some extra width to sew the lanes together.

Considerations

Poles: The poles are d plus 0.5m-1.5m, so you have 6m tipi, your poles should be 6.5-7.5m long. I tend to keep them a bit shorter in order to put a cap on the end of the poles against rain; this way the tipi poles don't look as impressive anymore, but you have almost no rain anymore reaching into the tipi.

Canvas: For larger tipis (>6m) your canvas gets big and also heavy (e.g. 300-450g/m2), and lanes are sewed together in order to get the half circle as the canvas looks like. The stick woven seam holes need additional seam sewing so the canvas doesn't tear there. Add extra length for general end-seam. The fabric should be water- and fire-resistant, and mildew resistant as well; and preferable preshrinked so you have no surprises.

The listed "How To Manuals" above cover more details, also the inlining which is essential for living in a tipi, without it a tipi is almost useless.

Extensions

I further like to add some extension and upgrades to traditional tipis:

Sealing 100% Rain

Once you dwelled in a tipi you likely experienced rain as well, and realized a native tipi isn't 100% rain sealed. Through the opening where the poles are tied together, is a small 20-30cm large hole, depending on the radius of the poles at the junction, and you can't avoid this, there rain falls direct into the tipi, not much, but when it rains for hours or even days it will be noteable. Theoretically the rain catched by the poles above the junction and in the air is supposed to run along inside the tipi - but this is not so, the rain first runs a few centimeters, then drops inside the tipi, then more rain runs a bit further and drops and so forth, it can take 1-2 hours until the rain runs all along the pole down the ground without dropping, and even so, poles aren't perfect so rain will still drop from the poles.

So, what can one do about this?


Tipi Hood / Bull Boat
Hood / Bull Boat

One option is to cut all poles to 0.5m to max 1m longer than the canvas, which means the tipi won't look as grand and majestic anymore, but you have a crown of maybe 0.5m to 1m in diameter, and you put over those a hood: no rain falls on the pole junction, neither any rain runs along the poles.


Tipi Drip Strip / Raincatcher
Rain Catcher / Drip Strip

This option has been brought to my attention by Lucy from SpiritsIntent.com , it's a drip strip which hangs inside the tipi, and catches all direct rain from the opening, and rubber wrapped poles: each individual pole with a tear drop shaped rubber, with a hole allowing the rubber, e.g. from car inner tube, moving on each individual pole and lead so the rain running on the poles as will on this strip. The strip itself lays on top of the door, which means all rain catched inside runs outside in front of the door finally.


Tipi Raincatcher / Drip Strip (courtesy by HearthWorks.co.uk)


Lining & Ozan (courtesy by Le-Tipi.com)
Ozan

A canvas hanging inside of the tipi with water-resistance canvas, alike the obove mentioned rain catcher, could also function as improved rain cover; just additional strip(s) would be required to lead the water near or beyond the inlining.

Upgrade Size


In case you have a small tipi, e.g. less than 4m (12"), you may consider to extend it in size.

I extended my tipi by apprx. 1.4m, from 3.6m to 5m, which gives a new floor area of 19.6m2 instead of meager 10.1m2 I had before, a plus of 93%, almost double area with just extending canvas by 1.4m (A = r2 * π, so A scales by r2).

Best measure the length of the poles and see how much you can extend the cover using the same poles.


Segments based extension for tipi upgrade
Several options:

  • cut a circular ring (or parts of it), or
  • cut n-amount of segments, e.g. 10 segments, where the top width is cold/10 (where c is the circumference), and the bottom width cnew/10, and sew all segments together making up the extension ring,

and sew it to the bottom of the existing cover. I used a cord to mark a half circle with a pen, then cut (give 2-3cm more), and sew it along the marked line. I had some spare Polyethylen (PE) blankets left which I used this way; I anyway recommend to add synthetic fabric at the bottom of the tipi as there rotting occurs first, and your tipi may last much longer than without it.



Upgraded tipi from 3.6m -> 5m
The problem you face is that the former door will be too high, e.g. 1m above the ground. I recommend to use some wood to build stairs in front of the door, and within the tipi at the door. In case you plan a bigger upgrade, consider to close respectively sew the door permanently and make a new door hole - which of course involves additional sewing along the new door opening.

Windows

I have been considering to do some windows; two main approaches seem suitable:

  • pulling or lifting the cover from a side up with a cord
  • working into the cover some plastic fabric as a window

The "lifting the cover" is easy to do, and with 2-3 cords you can lift up 1/5 of the cover up to 1.5m or 2m, more to pull up is difficult as the cover is quite heavy, e.g. in my case the 5m tipi it's well over 10kg already.


2005/09/13 14:34
 
2005/09/13 14:37
 
2005/09/13 14:35
 
2005/09/13 14:36
 

2005/09/13 14:37
 

Working in plastic fabric as windows has the advantage of an opening despite of rain; but the insulation might become a problem; and the material needs to be UV resistant and flexible enough to be folded with the main cover. One of the ideas I had was to use a lane of 1.25m wide clear PVC instead of a canvas lane, e.g. one of the middle lanes - this would give a curved window lane.


Stove & Winterization


Stove with Pipe (courtesy by Nomadique.net)
People using the tipi over the winter-time, e.g. in Switzerland, placed a large wood stove for heating, but it must be said it is not very energy efficient to heat a tipi, unfortunatly, unless you spend a lot of time and pelts to insulate the inside of the tipi, the roof opening with the pole is the main problem to properly heat a tipi.

John Ryerson wrote an email to me (2013/01) about further details:

Create a 'suspended ceiling' as an extension of the tipi liner and then use extremely light weight reflective insulation (wafer thin) in the space above and around the tipi between the tipi cover and the liner. This will allow for air flow while keeping the heat in the living area. I recommend a southwestern chiminea type of stove as these ceramic fireplaces continue to radiate heat long after a wood fire may have run it's course. A simple metal flashing above this fireplace with an opening for smoke exhaust is the final suggestion. All of the tipi natural advantages are enhanced in this way.
(..) use of rocks heated and brought into a tipi for radiant heating another is the used of embers covered with earth over which a sleeping mat is placed but perhaps the most exact parallel is the use of thermal mass walls by the Mayan and Mixtec peoples for a type of sauna or just heating a room.
(..) the insulation of a tipi I would suggest that the 'furs and blankets' of the 21 st century would be inexpensive second hand sleeping bags. These make for perfect insulation placed between the tipi's two inner and outer liners plus have the benefit of being available for bedding for guests in more mild weather. I personally saw some native elders use sleeping bags adapted as traditional tipi back rest by strapping them to the tipi poles with the added advantage of pulling the rest of the bag over them like comforter as the evening became cooler.
Sleeping bags could be used to create the 'suspended ceiling' supported by a 'spider web' of cords from the tipi poles.... think of this thermal envelope as a sort of a temporary Bedouin tent inside the tipi during winter. The rest of the year the tipi would function in the traditional manner.

Excerpt from "The Plains Cree: An Ethnographic, Historical, and Comparative Study" by David Goodman Mandelbaum (Page 89):

A black wall of buffalo hide, similar to that used by the Blackfoot, lined the sides of the tipi. Hay was stuffed between this screen and the tipi cover, providing insulation in winter and preventing draughts. In summer the bottom of the cover was rolled up on the poles to a height of about two feet from the ground.

As I wrote on several occasions on this web-site: use material for insulation which is on-site and plenty available, main feature should be it slowly rots and is dry, can be hay, but also paper etc.

I update these notes as I proceed with my own tipi. On the next page you find native american tipis and links to tipi manufactures.



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