Pulverised Fuel Ash (PFA)Pulverised Fuel Ash (PFA), also known as fly ash, is a fine, pozzolanic material. When blended with lime or cement, it reacts chemically to form additional binding compounds, improving the strength, workability, and long term durability of mortars, plasters, grouts, and concrete. Due to its slow reacting pozzolanic nature, PFA is widely used in heritage conservation, limecrete flooring, and grout injection for masonry repairs, where controlled setting

Once dried Aerosana Visconn creates a film over the substrate it has been applied to and renders the areas air tight but still with a high degree of flexibility for future movement

Backed by over 30 years of experience

Installation Guidance

By insulating cold wall surfaces internally

✅ Durable Construction – Withstands repeated hammering and wear on hard mortars

foot traffic

breathable insulation ideal for upgrading traditional and historic buildings without trapping moisture

preventing dry clumps and ensuring an even

Roundtower Insulating Plaster is a breathable lightweight lime insulating plaster designed to improve the thermal performance of solid masonry walls while maintaining vapour permeability and moisture movement within the building fabric

With a thermal conductivity of λ = 0

making it suitable for both new-build and renovation projects

It will seal the gap between the window or door frame and the wall to ensure there will be no air leakage