Roundtower NHL 3.5 Coarse (Premix)Roundtower NHL 3. 5 Coarse (Premix) Roundtower NHL 3. 5 Coarse is a ready mixed lime mortar manufactured from Natural Hydraulic Lime (NHL 3. 5) and coarse kiln dried sand, blended in a controlled factory environment to provide a consistent, breathable mortar for masonry, pointing, and rendering applications. Supplied in a pre blended 2: 5 lime to sand ratio, it eliminates on site batching while maintaining the durability, vapour permeability, and

05m makes the membrane extremely water vapour permeable

and traditional build projects

Used as a backing mortar behind the Casting Blend

to provide an airtight seal between two building elements and ensure that no air leakage will occur

Wood fibre boards

Heritage & conservation projects

foot traffic

Joint Treatment

When combined with Delta Rope

Unlike gypsum finishes

When installed sub-and-top

and reduced site mixing are priorities