Roundtower SuperTherm Thermal PlasterRoundtower SuperTherm is an ultra lightweight insulating lime plaster designed for breathable internal wall insulation in solid masonry, stone, brick, and heritage buildings. Formulated with hydrated lime, natural pozzolan (metakaolin), and an advanced ultra lightweight insulating aggregate, SuperTherm delivers exceptionally high thermal performance while remaining fully vapour open and moisture regulating. Unlike impermeable insulation systems,

✅ Alkali-Resistant & Vapour Open – Breathable and compatible with mineral building materials

5:1 aggregate/sand : NHL 5 Exposed Render 2

and other breathable insulation boards

and heritage restoration work

Adhero can also be used to streamline the sequencing of airtight work

or areas of weakened masonry that require stabilisation without introducing rigid or impermeable materials

and rub down firmly to activate adhesion

Avoid over-watering and mix gently to reduce airborne dust

No Special Handling or Mixing – Ready-to-use straight from the container

and longevity of your mineral paint finish—whether you're restoring a historic facade or working on a breathable new-build system

Available in a selection of high-quality hardwoods and finishes

✅ Controls Absorbency – Regulates surface suction for consistent plaster and paint application