The most important materials: galvanized sheet metal, plywood, window glass, straw or similar insulating materials. Usually they are available even in remote regions.

However, some minor parts may have to be imported: adhesive Reflecting foil and small parts like rivets, screws, washers etc. Usually it is difficult to find them exactly a ccording specification; that however, is necessary for smoothly running serial production. (See appendix B1 and B2 of the construction manual)