WATCH & LEARN / CREDITED RESOURCES

A viewing room for the curious.

Begin with David Wiggins, then explore conservation history and mortar analysis. Every resource links to its original publisher and credits its creator.

01 / START HERE

How Lime Mortar Works

David Wiggins · APT Symposium 2020

A structural engineer’s account of deformability, capillary drying and sacrificial behaviour in traditional masonry. Watch for how the wall’s performance differs from the strength of an isolated mortar sample.

Watch on YouTube

01:10Structure & deformability 06:46Water transport & drying 13:39Sacrificiality & salts 18:58Conservation implications

02 / HISTORIC ENGLAND

Mortars for Conservation: Part 1 — History and Materials

Alison Henry & John Stewart · Historic England, Technical Tuesdays

A recorded introduction to the development of mortar materials and conservation practice. The publisher also provides a transcript.

Watch the recording

03 / HISTORIC ENGLAND

Mortars for Conservation: Part 2 — Mortar Analysis

Historic England · Technical Tuesdays · Recorded 25 May 2021

An introduction to examining mortar evidence before specifying a repair. Use it alongside the history lecture to understand why the existing material matters.

Watch the recording

04 / NATIONAL PARK SERVICE · AUDIO

Historic Uses of Lime Mortar, and Its Continuing Importance Today

National Center for Preservation Technology and Training · National Park Service · Andy DeGruchy

A conservation podcast about lime mortar and the consequences of incompatible repairs. An audio companion to the video resources.

Listen & read