Limecrete
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.
It is a 'breathable' material, which allows the transmission of water vapour. When used as a floor slab, this can help ensure that any rising damp does not affect breathable wall constructions.
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.
[edit] Find out more
[edit] Related articles on Designing Buildings Wiki
Featured articles and news
Infrastructure that connect the physical and digital domains.
Harnessing robotics and AI in challenging environments
The key to nuclear decommissioning and fusion engineering.
BSRIA announces Lisa Ashworth as new CEO
Tasked with furthering BSRIA’s impressive growth ambitions.
Public buildings get half a million energy efficiency boost
£557 million to switch to cleaner heating and save on energy.
CIOB launches pre-election manifesto
Outlining potential future policies for the next government.
Grenfell Tower Inquiry announcement
Phase 2 hearings come to a close and the final report due in September.
Progress from Parts L, F and O: A whitepaper, one year on.
A replicated study to understand the opinion of practitioners.
ECA announces new president 2024
Electrical engineer and business leader Stuart Smith.
A distinct type of countryside that should be celebrated.
Should Part O be extended to existing buildings?
EAC brands heatwave adaptation a missed opportunity.
Definition of Statutory in workplace and facilities management
Established by IWFM, BESA, CIBSE and BSRIA.
Tackling the transition from traditional heating systems
59% lack the necessary information and confidence to switch.
The general election and the construction industry
As PM, Rishi Sunak announces July 4 date for an election.
Eco apprenticeships continue help grow green workforce
A year after being recognised at the King's coronation.
Permitted development rights for agricultural buildings
The changes coming into effect as of May 21, 2024.