The roofs were thatched with bark, straw, reeds or rushes.
Their houses, regularly ranged in streets, are built of adobes thatched with coarse grass.
In this period of anarchy the native princes of Glamorgan had their principal demesne, not at the camp but a mile to the north at Llystalybont, now merely a thatched farmhouse, while some Saxon invaders threw up within the camp a large moated mound on which the Normans about the beginning of the 12th century built the great shellkeep which is practically all that remains of their original castle.
In spite of Fitzstephen's glowing description we must remember that the houses of London were wholly built of wood and thatched with straw or reeds.
A thatched roof is imperative in the orthodox shrine, but in modern days tiles or sheets of copper are sometimes substituted.