32 sq ft re roof from shake to lightweight tile if a re-roof project is proposed, the following specifications apply. Existing roofing material wood shake proposed roofing material lightweight tile and sheathing manufacturer boral brand and model cedar light color (if cool roof required) ironwood built-up roofing assembly system number per attached listing report (if applicable) n/a specific exemption from cool roof requirements (if applicable) n/a note self-certification by a licensed contractor is acceptable if a signed letter on company letterhead is provided to the building inspector.