Lime in Heritage Conservation – Applications and Combination with Renewable Raw Materials

2:30 PM - 3:00 PM Thu, 05 Nov

Ausstellertreff - Multi-purpose area 4, Level 0

Short description

The lecture uses the conservation of Kaufbeuren’s town wall and hemp-lime insulation to demonstrate how lime binders can be used both in heritage conservation and in sustainable construction. Historically inspired lime mortars are designed to be more compatible with old masonry than modern cement mortars, while hemp-lime provides a vapour-permeable solution that regulates moisture and supports a healthy indoor climate. Both examples highlight the versatility and sustainability of lime as a building material.

Description

Use of Different Lime Binders in the Conservation of Kaufbeuren’s Town Wall

The conservation of Kaufbeuren’s town wall is regarded as an example of a heritage-sensitive approach to historic masonry. As with many restoration projects involving medieval fortifications, different repair mortars based on historic recipes and using a variety of lime binders were produced. The aim was to develop mortars that are more compatible with the historic masonry than modern cement mortars in terms of strength, water-vapour permeability, moisture behaviour and weathering.

Lime as a Binder for Spray-Applied Insulation Using Renewable Raw Materials

Hemp-lime is an ecological, vapour-permeable building material that contributes to a healthy indoor climate. It can absorb, store and release moisture, thereby regulating indoor humidity naturally. During application, lime slurry and hemp shiv are mixed only at the spray nozzle, ensuring optimal adhesion. Developed in France, this technique has proven successful for more than 25 years.