Fire doors
P-Core Doors
P-Core has been designed using the latest technology to produce a tri‐layered solid timber core in order to provide an extremely robust and stable base onto which quality exterior grade plywood faces are applied. P-Core door blanks have been tested and approved for use in the manufacture of interior and exterior fire doors.
Structural openings
The following types of structural opening are approved for P-Core doors:
- Cast dense concrete
- Dense concrete blocks or brickwork
- Masonry
- Lightweight concrete
- Lightweight aerated concrete
- Timber stud partition
- Steel stud partition
Exterior Applications
The building designer is responsible for specifying flashing system/s to ensure that the interface between the jamb and the exterior wall meets the requirements of NZBC E2.
When installing in an exterior location the door jamb should be set back from the outer face of the wall. The door head must be protected by a canopy or the head of the jamb should be provided with a projecting head flashing.
Particular attention should be given to the protection provided for an outward opening external door.
The installation of a weather bar at the threshold is considered good practice for exterior doors.
Mortise locks ‐ Ensure the mortise is accurately machined and a snug fit for the lock is maintained. The mortise should be properly sealed before fitting the lock.
If cutting or drilling is required on an exterior door or jamb you must coat the newly exposed timber with "COTEC - Uniseal Gloss LO 96-741" and re‐coat with primer or stain.
If installing letter plates, these should be of the sleeved type to ensure against water ingress into the door core. In fire doors letter plates must be of an approved fire resisting design.
We recommend the following:
- Malthoid damp-stop between any sill/concrete contact point
- Thoroughly seal end grain and underside with oil based primer before installation
POINTS TO CHECK BEFORE INSTALLATION
- If fire rated, check that the installers declaration has been received. This form is to be completed and returned for the issuing of fire door certification labels.
- Check that all hardware and fixings are on hand. All fire doors are required to have door closers and a self-latching or locking system. All hardware fitted to fire doors must comply with fire rating approvals. If unsure, please check with New Zealand Fire Doors or refer to the Approved Hardware List
INSTALLATION INSTRUCTIONS – PCORE EXTERIOR DOORS HUNG IN TIMBER JAMBS
- If there is no sill fitted to the bottom of the unit, check the required sill gap (be sure to make allowances for floor coverings). End grain in timber jambs must be thoroughly sealed with an oil-based primer/sealer.
- Trim or pack the bottom of jambs to reduce or increase sill gaps, as required. Maximum floor gap 10mm from the bottom of leaf to finished floor level.
- Position doorset in opening, ensuring square and true.
- Any timber fixed to concrete must be separated from the concrete by DPC (malthoid).
TIMBER AND STEEL STUD WALLS
Wedge/pack gap between back of jamb and framing. Nail or screw-fix (100mm nails, 75mm screws) at the mid-point of each hinge and at the same positions in the other side jamb. At least one fixing is required in the head at the mid-point of each leaf. Fixings are to be concealed by the planted stops (fitted later).
Where linings do not slot into the back of the jambs, the wedging gap is to be back-filled (with fire rated foam or Intumescent mastic sealant to each face of the wall). If fire rated linings slot into grooves or rebates in the jambs on both faces, the wedging gap does not need to be back-filled for fire requirements, but may be required for weather/acoustic requirements.
MASONRY WALLS
Pack and fix (min. 9mm diameter x 100mm long masonry bolts) at the mid-point of each hinge and at the same positions in the other side jamb. At least one fixing is required in the head at the mid-point of each leaf. Fixings are to be concealed by the planted stops (fitted later).
(In concrete/masonary/brick wall systems less than 137mm thick, the fixings should be stainless steel Chemset anchor studs, rather than dynabolts. ChemSet 801 Extreme fire rated adhesive should be used.
Where linings do not slot into the back of the jambs, the wedging gap is to be back-filled (with fire rated foam or Intumescent mastic sealant to each face of the wall). If fire rated linings slot into grooves or rebates in the jambs on both faces, the wedging gap does not need to be back-filled for fire requirements, but may be required for weather/acoustic requirements.
Fit the latch to door leaf using parallel shank screws. Pre-drill holes. Adjust to ensure that the door latches automatically, from any position.
- Fix planted stops using 50mm jolt head nails at 300mm centres. 5mm gap critical from face of leaf to doorstop face to accommodate smoke seal, fitted after painting.
- Fit closer to door leaf using parallel shank screws. Pre-drill holes. Adjust to ensure that the door latches automatically, from any position.
- Complete the installer’s declaration and return promptly to the door manufacturer. Labels will be dispatched with fitting
Download Exterior Doors Care Handling & Installation Instructions
Priming and Finish Coating
Detailed instructions can be found Here..
NZ Fire Doors may refuse responsibility for any defect or failure that may consequently occur which is attributed to non‐compliance either wholly or in part with the advice given in this information sheet.
Intumescent strips do not need to be masked for painting; intumescent performance is rated for up to 5 coats of paint. Do not paint over brush or rubber smoke seals.