Interior view of Hafod Yspytty, Ffestiniog showing roof cruck.
Hafod Yspyty is a classic upland hallhouse of north-western (Gwynedd) type, i.e. cruck-framed and stone-walled. There are two main phases:
(1) c. 1500. A three-unit hallhouse of 'gentry' type with a two-bay hall with central, open truss with cusped apex and double-pegged archbrace. The two-door dais-end partition survives. The partition is of post-and-panel type survives and the inner-rooms appear to have had a ceiling of post-and-panel type.
(2). c. 1600 Inserted hall ceiling and chimney with fireplace stair creating a house of lobby-entry type.