TrassTrass is a natural pozzolanic material derived from volcanic deposits, widely used as an additive in lime mortars, renders, and plasters to enhance strength, durability, and moisture resistance. When mixed with lime, Trass undergoes a hydraulic reaction, improving setting characteristics and reducing shrinkage while maintaining high breathability. Key Benefits: Enhances Strength & Durability Increases compressive strength and reduces shrinkage, making

Its versatile formulation allows it to be used as both a base coat and finishing plaster within breathable construction systems

038 W/mK Density Approx

Roundtower SuperTherm Finishing Plaster is a breathable lime-based finishing coat specifically designed for use over Roundtower SuperTherm insulating plaster systems

Specifically formulated to provide a strong mechanical key into traditional vertical and horizontal timber lath systems

The Faithfull Small Plastic Float is a sturdy yet lightweight tool

and more sustainable building envelope — perfect for both new-builds and heritage conservation

Non-Shrink

Always use with Tempo retarder to control set and achieve practical open time—especially in warm

Blend with suitable washed aggregates to produce mortars or plasters

supporting the drying potential of breathable construction systems

Delta Rope ensures that penetration points through the membrane remain sealed

note that pigment addition can affect mortar strength