- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 12 Nov 2020
Limecrete is a combination of natural hydraulic lime and lightweight aggregate such as sharp sand or glass fibres. This creates a breathable material which can be used as an alternative to concrete, in particular for floor slabs in the conversion of old buildings to modern standards - helping to deal with naturally occurring moisture. Limecrete can help to resolve design problems associated with older buildings and energy efficiency, while retaining a traditional character and aesthetic.
Limecrete is often laid on a base of foamed glass beads rather than hardcore, without a damp proof membrane (DPM). This enhances the breathability of the slab, since hardcore can allow capillary action to draw up ground moisture. Foamed glass beads are the most common option since there are few other non-capillary substrate materials available.
Limecrete is relatively slow to set and absorbes CO2 during the drying process. It has a certain amount of flexibility compared to concrete. It is strong enough under compression to serve as a floor slab material, and can be strengthened by adding fibres and increasing the lime content. Care should be taken in mixing the materials however as excessive lime content can compromise breathability.
Underfloor heating can be used with limecrete.
 Find out more
 Related articles on Designing Buildings Wiki
Featured articles and news
Prioritising tax considerations.
The four D creative process: discover, define, develop and deliver.
National Cyber Security Centre initiative is announced.
Reviewing trends and projections.
Legislation will establish initiatives to move towards net zero.
How to document contractor employment status.
Tech tools to help manage people and space post-pandemic.
A style that ranges from mock Tudor to arts and crafts to the 'Wrenaissance'.
Free guide from Secured by Design.
BREEAM strategy for sustainability and the circular economy.
Free tool to improve the construction programming process.
Are buildings doing what they're supposed to be doing?
Cities with quick access to everything by foot or bike.
The pressures and pinch points of global destinations.