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 Checklist Visual indicators of critical features you must get right Additional Information Installation Training Information - SIGN IN / SIGN UP To download the online Handbook