A 16mm thick fascia board with standard square styling that is light but strong.  Fixes directly to rafter feet and bears the weight of eaves tiles and guttering without the support of a backing board or tilt fillet. Soffit engages by push fit.
 
Swish (Summit) 16mm fascias boards are BBA Certified, do not require a backing board and will carry the weight of the eaves tiles and the gutter. Polytop fixings should be 600mm centres for white and 400mm centres for foiled and coloured profiles.