Lime Mortar

Historic Scotland

Historic Scotland's Guides

Short Guide 6 Lime Mortars in Traditional Buildings

INFORM - Repointing Rubble Stonework

Other

Interesting articles on the 'traditional' 1:3 mix ratio:

The Myth in the Mix - The 1:3 ratio of lime to sand from BuildingConservation.com by Gerard Lynch MA PhD, reproduced from The Building Conservation Directory, 2007

and another Issues with standardised lime mortar specifications available on Malton Buildings Group website

Mud mortar article:

Mud Mortars in Masonry Construction – Malton, North Yorkshire (Nigel Copsey, Ben Gourley and Richard Allen (ra528 at york.ac.uk)

Abstract This paper deals with the historic use of earth mortars in masonry construction and the appropriate conservation and repair of buildings in which these were common. It examines their extensive use in Malton, North Yorkshire, where earth mortars were the material of choice for stonemasons and plasterers until the middle of the 18thC; as commonly in high status as lower status buildings. It demonstrates that earth mortars in masonry construction were very much more common and are much more widespread in the UK (and doubtless elsewhere) than has been generally understood or acknowledged and that this raises serious issues for the investigation and compatible, authentic conservation and repair of these buildings.The primary case study is York House in Malton, a late C15 H-plan house of high status with subsequent significant alteration as a gentry house in both 1620 and 1694. This is illustrated by our own practice during the conservation of this exceptionally significant building and by data produced from ongoing laboratory analysis of early mortars from within York House and beyond.