PHS Astra SDS Membrane - 1.5x50m

PHS Sd2 Vapour Control Membrane has an optimum fixed vapour resistance level of Sd 2m. This allows for an ideal level of vapour control by preventing diffusion of internal humidity into the building envelope in winter and allowing back fusion from the building envelope in summer. This prevents a build-up of condensed water vapour within the construction that facilitates mildew growth and constructional damage.