Envirograf Under Floor Fire Barrier

Fire and acoustic resistant barrier for use between joists over lath and plaster ceilings

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  • Regular price £22.41
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– Provides up to 104 minutes integrity and insulation- A 40mm thick sponge is also available, fitted in between the joists to provide acoustic protection and insulation
– Ideal for protecting joisted wooden floors situated above suspended ceilings
– Can accommodate joists which are up to 600mm apart, using wire mesh to provide additional support


The under floor fire barrier is layed on top of the ceiling. Allow for a 50mm up each side of joist (e.g. if the gap between the joists is 400mm, a 500mm wide under floor barrier is required). 18 long fixing washers are supplied for fixing every 200mm apart per barrier. Individual sections of the barrier should be overlapped by 50mm.
For acoustic requirement to U value and to meet Document E (H in Scotland) a 40mm thick sponge is supplied for the width between the joists – simply push into place between joists once the barrier is fitted.