Roofing in Algeria

Algeria is Africa's largest country, stretching from a Mediterranean coast and the Atlas ranges to the deep Sahara. Its best-documented traditional roofs are those of the Saharan ksour (fortified villages), above all the five towns of the M'zab Valley, whose tightly packed houses around a central mosque are a celebrated example of desert urbanism.

Climate and hazards

The north has a Mediterranean climate with winter rain; most of the country is hot desert, where heat and sand are the main roof loads. Northern Algeria is seismically active, which matters for heavy masonry and concrete roofs.

Roofing history

The M'zab Valley was settled by the Ibadites in the 10th century. Its five ksour, El Atteuf (the oldest), Bounoura, Melika, Ghardaïa and Beni Isguen, were founded between 1012 and 1350; Berriane and El Guerrara were added later, making seven settlements. Houses were built to a standard size and type, arranged in concentric rings around the mosque, an arrangement intended to support egalitarian community life while protecting family privacy. UNESCO notes that the valley has kept much of its way of life and its building techniques since the 11th century, using local materials.

Traditional and vernacular roofs

• M'zab houses: houses of local materials, of standard size and type, closely packed in rings around the mosque.
• Saharan ksour: across the Algerian Sahara, ksour of earth and stone with flat roofs on timber or palm joists are the traditional form (see Roofing in North Africa).
• Domes and vaults: masonry domes appear on religious and funerary buildings (see Middle Eastern domes).

Roofing today

Reinforced concrete flat roofs dominate new construction across North Africa (see Roofing in North Africa).

Notable roofs

• M'zab Valley: five fortified towns, inscribed on the World Heritage List in 1982.

Local roofing terms

• ksar (plural ksour): fortified village.

Sources and gaps

Specific seismic code details: published information is limited. No household survey or census table on roof materials for Algeria was found in published sources. No national roofing code was found. No information on domestic roofing manufacturers was found in published sources.

Detailed descriptions of M'zab roof construction (materials, layers, rooftop use), the earth architecture of the Gourara and Touat oases, Kabyle tiled roofs in the north, colonial-era building, and modern roof materials were not found in published sources.