Nhbc Fire Door Gaps

Nhbc home nhbc.

Nhbc fire door gaps. The gap at the bottom of the door is usually around 10mm for non smoke conditions but 3mm when smoke seals are required. A ventilation grille or a gap at the bottom of the door may be required for ventilation in accordance with building regulations. Fire doors play a major role in the fire safety and protection of all buildings covered by the fso and it is important that fire doors are inspected correctly and maintained in order to ensure compliance. Where a gap is provided it should not exceed 10mm.

Timber windows and door frames can be installed abutting masonry. Edge gaps to the jambs and head of the door should be a maximum 4mm. The gap at the bottom of the door should be restricted to maximum of 22mm from an unfinished floor and a maximum of 10mm from a finished floor. National house building council is registered in england and wales under company number 320784.

The investigation identified that fire doors from five suppliers failed to meet requisite fire performance standards when tested in accordance with guidance in appendix b of approved document b fire safety. When the gap is less than 5mm the sealant should cover both the frame and the surrounding masonry by 6mm. Gaps around windows revised march 2017 background ventilation to utility rooms gaps around timber windows and timber door frames door between an integral garage and the dwelling security egress windows and conservatories fire doors to bathrooms. Nhbc s registered address is.

The gap between the door and head or jamb should be a maximum of 4mm for double doors the gap at the meeting stiles should be within 4mm and uniform distortion across doors should be limited to a maximum of 5mm in height and 3mm in width the gap between the underside of the door and unfinished floor should be between 10mm and 22mm. Where gaps exceed 10mm the construction must achieve the full period of fire resistance as required for the surrounding separating wall. In general the gap should not exceed 3mm along the 2 long edges and across top of the door leaf to facilitate checking of the gap on site a bwf fire door alliance scheme gap tester is available on request here. Nhbc standards chapter 6 7 doors windows and glazing.