The Greenstone Home Reference mark: a square quarry tile carrying the letters G R.

Greenstone Home Reference

Working notes on repairing, insulating and upgrading older masonry houses.

Windows & Doors

Openings leak far more per square metre than the walls around them, and most of that is repairable without replacement.

Elevation of a double-hung sash window with six leak points labelled: head, meeting rail, stiles, sill, pulley pockets and the frame perimeter.
The six places a double-hung sash loses air. Only the last of them is a frame problem; the other five are adjustment or draught-sealing work.

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