Limetec® hydraulic lime mortar is a modern version of one of the world’s most traditional building products.

Hydraulic lime mortars have been traditionally used for the refurbishment of heritage buildings, although they offer many desirable properties for new build as well. They have the ability to accommodate slight movements in buildings caused by settlement or thermal shock and can therefore reduce or eliminate the need for unsightly expansion joints. They also remain workable for up to 24 hours and have a long-proven performance, while hardened mortar provides good bond and compressive strength.

To make the product more commercially viable for both new build and large refurbishment projects, Lime Technology, has developed Limetec® hydraulic lime mortar.

Previously only available in bags, the product now benefits from modern manufacturing and on site production techniques and can be delivered to site in bulk silos, capable of holding up to 35 tonnes of dry-mix mortar. This system is a proven method of guaranteeing mix proportions, ensuring a constant supply and eliminating wastage as mortar can be produced, as required, at the simple touch of a button. The product is also available in 25kg bags.

There are three standard mortars which cover a range of likely applications both for conservation and new build. These are as follows: -

Limetec® eminently hydraulic mortar
For use where a higher level of durability is required i.e. masonry exposed to severe weather

Limetec® moderately hydraulic mortar
For most normal applications i.e. cavity brickwork, blockwork and stonework

Limetec® feebly hydraulic mortar
For use with softer bricks and stone, solid wall construction and conservation masonry.

Limetec® mortars are manufactured using a blend of limes. They comply with the durability requirements of BS5628: Part 3:2001. Mortar strengths are measured at 91 days as opposed to 28 days as lime mortars gain strength more gradually compared to Portland cement based mortars. Materials used conform to the following standards: -

Sand BS EN 13139:2002
Natural hydraulic lime (NHL) BS EN 459: Part 1:2001
Calcium lime (CL90) BS EN 459: Part 1: 2001