EcoTherm Eco-Cavity Wall Insulation Boards comprise a fibre free rigid polyisocyanurate (PIR) insulation core faced with aluminium foil composite on both sides. They are suitable for partial fill cavity wall insulation. This board is available in 50mm , 75mm or 100mm . The boards are conveniently sized to co-ordinate with brick and block dimensions and allow the insertion of wall ties at the appropriate spacing. With high levels of thermal performance are achieved for thinner constructions while still having a clear air gap and protection from rain in heavy weather locations. Contact us today.