The inhabitants of Skara Brae were makers and users of
grooved ware, a distinctive style of
pottery that had recently appeared in northern Scotland. The houses used
earth sheltering: built sunk in the ground, into mounds of prehistoric domestic waste known as
middens. This provided the houses with stability and also acted as insulation against Orkney's harsh winter climate. On average, each house measures and has a large square room with a stone
hearth used for heating and cooking. Given the number of homes, it seems likely that no more than fifty people lived in Skara Brae at any given time. It is not clear what material the inhabitants burned in their
hearths. Childe was sure that the fuel was
peat, but a detailed analysis of vegetation patterns and trends suggests climatic conditions conducive to the development of thick beds of peat did not develop in this part of Orkney until after Skara Brae was abandoned. Other possible fuels include
driftwood and
animal dung. There is evidence that dried
seaweed was widely used. At some sites in Orkney, investigators have found a glassy, slag-like material called "
kelp" or "cramp" which may be residual burnt seaweed. The dwellings contain several stone-built pieces of furniture, including
cupboards,
dressers, seats, and storage boxes. Each dwelling was entered through a low doorway with a stone slab door which could be shut "by a bar made of bone that slid in bar-holes cut in the stone door jambs." A series of drains have been built underneath at least five of the houses, although the extent of this system has not been fully mapped. Seven of the houses have similar furniture, with the beds and dressers in the same places in each house. The dresser stands against the wall opposite the door and is the first thing anyone entering the dwelling sees. Each of these houses had a larger bed on the right side of the doorway and a smaller one on the left.
Lloyd Laing noted that this pattern accorded with
Hebridean custom up to the early 20th century, suggesting that the husband's bed was the larger and the wife's was the smaller. The discovery of beads and paint pots in some of the smaller beds may support this interpretation. Additional support may come from the recognition that stone boxes are located to the left of most doorways, forcing the person entering the house to turn to the right-hand, "male" side of the dwelling. At the front of each bed lie the stumps of stone pillars that may have supported a canopy of fur, another link with recent Hebridean style. House 8 has no storage boxes or dressers and has been divided into something resembling small cubicles. Fragments of stone, bone, and antler were excavated, suggesting House 8 may have been used to make tools such as bone needles or
flint axes. The presence of heat-damaged volcanic rocks, and what appears to be a
flue, supports this interpretation. House 8 is distinctive in other ways as well: it is a stand-alone structure not surrounded by midden; instead it is above ground with walls over thick and has a "porch" protecting the entrance. The site provided the earliest known record of the
human flea (Pulex irritans) in Europe. The
Grooved Ware People who built Skara Brae were primarily
pastoralists who raised cattle, pigs, and sheep. Fish bones and shells are common in the midden, indicating that dwellers ate seafood. Limpet shells are common and may have been used as fish bait, kept in stone boxes in the homes. The boxes were formed from thin slabs with joints carefully sealed with clay to render them waterproof. This pastoral lifestyle stands in sharp contrast to some of the more exotic interpretations of the Skara Brae people's culture. Euan MacKie suggested that Skara Brae might be the home of a privileged theocratic class of wise men who engaged in astronomical and magical ceremonies at nearby
Ring of Brodgar and the
Standing Stones of Stenness. Graham and Anna Ritchie cast doubt on this interpretation noting there is no archaeological evidence for this claim, although a Neolithic "low road" that goes from Skara Brae passes near both these sites and ends at the chambered tomb of
Maeshowe. Low roads connect Neolithic ceremonial sites throughout Britain. ==Dating and abandonment==