E-FT-5 TIMBER - I-JOISTS - Cellecta ScreedBoard® 28 system Cellecta ScreedBoard® 28 on timber sub-floor Timber I-Joists Use with timber frame walls only DETAIL INFORMATION Floor and Wall Combinations and Code for Sustainable Homes and EcoHomes credits Checklist Visual indicators of critical features you must get right Additional Information Installation Training Information - SIGN IN / SIGN UP To download the online Handbook