Guest Calire Posted June 8, 2016 Report Share Posted June 8, 2016 Good afternoon, I am interested in purchasing ply flush fire doors but was wondering if shallow router groves can be added as a decorative feature. Is they a maximum depth ? I would appreciate any help on this matter Kind regards Claire Quote Link to comment Share on other sites More sharing options...
Tom Sutton Posted June 8, 2016 Report Share Posted June 8, 2016 If you carry out any modifications to a certificate fire door you stand a chance of invalidating the certificate and there is no way of knowing if the fire resistance has been compromised. Quote Link to comment Share on other sites More sharing options...
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