This led to the establishment of settler-colonies in Algeria, Tunisia, South Africa, Namibia, Angola, Mozambique, and central African areas like Zimbabwe and Zambia. Eventually the overriding economic factors led to the colonization of other parts of Africa.
(July 2009) (Learn how and when to remove this template message) Tar paper is a heavy-duty paper used in construction. Tar paper is made by impregnating paper or fiberglass mat with tar, producing a waterproof material useful for roof construction. Tar paper is distinguished from roofing felt which is impregnated with asphalt instead of tar, but these two products are used the same way, and sometimes are informally used as synonyms. Tar paper has been in use for centuries.
Bituminous felt laid across rafters of a pitched roof. Pitched roofs using sarking felt underlay provide watertightness.In many countries, including Scotland, it is usual to 'sark' the roof with a covering of timber boards or sheet composite over the rafters.sing a sarking board also opens up the way for exposing the underside of this board and the roof timbers, since it becomes possible to support the timber frame roof insulation material on the top side of this. I hope this answered your question. If so please ACCEPT my answer.