Bu i Brawf 3 fethu'r prawf system gyfan, gan y bu i ledaeniad y fflamau ymestyn yn uwch nag offer y prawf. Mae canlyniad y prawf yn dangos bod y system hon wedi methu â bodloni'r meini prawf a nodir yn BR 135 fel sy'n ofynnol yn ôl y canllawiau cyfredol ar Reoliadau Adeiladu. Caiff prawf pellach, sef y seithfed prawf, ei ychwanegu at yr amserlen i ddilyn y pumed a’r chweched prawf, a hynny er mwyn rhoi darlun mwy cyflawn, gan brofi ACM â llenwad polyethen arafu tân (categori 2 mewn profion sgrinio) gyda insiwleiddiad sbwng ffenolig.
Test 3 failed the whole system test, due to the flame spread extending above the test apparatus. The test result shows that this system failed to meet the criteria set out in BR 135 as required by the current Building Regulations guidance. A further, seventh, test will now be added to the schedule to follow the 5th and 6th tests. This is intended, to give a more complete picture, testing ACM with fire retardant polyethylene filler (category 2 in screening tests) with phenolic foam insulation.