Guest Elliot Posted September 19, 2022 Report Share Posted September 19, 2022 When building a sub frame around a fire door I know the guidance states solid wood should be used. Is it acceptable to use ply wood? It is spanning the width of the wall and is positioned side on so you can see it’s layers. my concern is whether the layers would break down too quickly in a fire and would be point of failure. This is around fd30 and fd60 door sets. Quote Link to comment Share on other sites More sharing options...
Neil ashdown Posted September 21, 2022 Report Share Posted September 21, 2022 Contact the fire door leaf / fire door-set manufacturer for advice. They will have evidence of fire resistance performance for the door and be able to advise the requirements for subframes. Quote Link to comment Share on other sites More sharing options...
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