Manthorpe Blue & Black Polypropylene Combination Airbrick, Size: 9x3in

The G930 Airbrick has been designed to provide high levels of ventilation into cavity walls and underfloor voids. Can be stacked to create 9x6 & 9x9 airbricks The Manthorpe G930 Airbrick has been designed to provide high levels of ventilation into cavity walls and underfloor voids. The 9" x 3" brick is stackable and can be joined together to create larger vent openings 6,450mm² of airflow per 9âx3â airbrick Can be stacked to produce 9x6in and 9x9in The brick incorporates a front mounted grille to prohibit large insects gaining access but wide enough not to be blocked by debris, paint or water droplets A mortar key around the edge of the airbrick ensures secure adhesion to the building fabric while a clip together facility provides a choice of ventilation sizes Available in various colours to suit different substrates