I'm not certain if you mean a model of an Indian longhouse or an *actual* longhouse, but I'm in the process of building a model right now and I am 90% complete - I got the plans from the internet.
I believe you could build an actual longhouse from these plans as well, but with a modification or two. I am also making changes to my model. I have cut the lower cross-poles short because otherwise they are shown sticking across the aisles, and in the full-size models I've seen in the NYS museum, the lower cross-poles do not interfere in the aisle, or else you'd bang your shins on them.
These plans are also light on detail for the rounded end (giving floor plan but not rafter plans) but I am going to make my own ends in the same style as the rest of the longhouse.
See related links below for website
The dominant theory is that walls were made of sharpened and fire-hardened poles (up to 1,000 saplings for a 50 meter house) driven into the ground with their tops bent over and tied to the poles of the opposite wall. Strips of bark were then woven horizontally through the lines of poles to form more or less weatherproof walls with doors usually in one end of the house, although doors also were built into sides of especially long longhouses.nice man
It depends how accurate you want the model to be. Some time ago I made a model using pieces of card on a thin wooden base and it turned out fairly well.
I took a square piece of hardboard as the base, slightly larger than the longhouse was going to be. Then I found some strong but thin card and curved it along its length to make the basis of the longhouse, leaving the sides fairly flat but with the roof section curving. This was glued to two end sections using small blocks of balsa wood to strengthen the joints inside (where they would not be seen). A doorway was cut into each end section.
I fixed two rows of low balsa blocks to the base, at exactly the internal width and length of the longhouse - these would represent the beds along each side wall but would actually provide somewhere to glue the walls. When the curved section with its end pieces was added the whole thing looked like a barrack room from World War 2.
To represent the covering of bark I glued small rectangles of card over the whole roof and walls, starting at the bottom and overlapping each layer - some rectangles were allowed to slant a bit to add some interest. The end walls were also covered.
When this was complete the whole thing was allowed to dry before I attacked it with some household filler (I used Tetrion but any similar product would do). The filler was applied with a small stiff brush in a vertical direction to represent the texture of the bark.
When the filler or plaster is dry it can be painted shades of brown/grey and drybrushed with pale grey to bring out the texture. Cocktail sticks or wire can be used to represent the external framework (this prevents the bark pieces from being blown away in a strong wind).
I added a porch at one end and textured the base with fine sawdust and small stones - when painted these give a good effect.
The inside of the longhouse could be super-detailed with cocktail sticks and wire to represent the internal framework, but not much of this can ever be seen so I chose not to.
See links below for images:
the kootenai indians sheltered in sweat lodges,tipis and longhouses
They made houses such as longhouses, houses that were long enough for more than one family in the Iriquois tribe.
woodland indians lived in longhouses and olmecs in tepees
longhousesthey lived in longhouses they made it out of young trees and bark
Pretty much the same as everyone else.
wood and animal skins
yes they lived in longhouses
The Nez Perce used twigs, bark, logs, and thatch to build their longhouses
Longhouses
they lived in longhouses.
longhouses
iroquoian indians lived in longhouses
Woodland Indians lived in wigwams and longhouses
they lived in longhouses.
They Lived in Longhouses
teepee's , longhouses.
Longhouses