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Installation Guide

Important Customer Notice

Please take care when installing your new  door system and in following the Door Installation Guide instructions provided. Admiral Homespace shall not be liable for any loss, damage or injury caused by your failure to follow the Door Installation Guide instructions in installing your new door.

Installation Preparation

Lay door system in its protective packaging on a flat surface adjacent to the point of installation.
Visually check door for damage prior to removing packaging, and check paperwork for correct specification.
Carefully release upper packaging from door system and remove protective packaging from corners and edges. Leave door in position on packaging until ready to fit.
Separate door furniture and loose supplied items and remove to a safe area away from the immediate area of work.
Using a measure, accurately re-check horizontal and vertical doorway dimensions and verify against frame dimensions of new door before commencing. As this is a combined door/ frame system, ensure all measurements are taken from the door surround, rather than the old frame. During ordering, Admiral will normally make some compensation within your supplied measurements (typically a 5mm reduction on each door edge) to allow some margin for doorway alignment.
Remove old door from its hinges and set aside for recycling.


Remove existing door frame (if applicable). Wearing safety glasses and gloves, start by scoring around the perimeter of the  frame with a craft knife being careful not to damage underlying plasterwork.
Partially saw through the two vertical door jambs with a diagonal cut at their midpoint and remove each in two sections. Do not saw jambs all the way through to avoid damage to structure or the internal reveals.
Wearing gloves and safety glasses, lever the jambs away from the walls using a bearing block or wood offcut to protect the plaster and render from damage. Complete cuts to door jambs and remove.
Remove lower and upper door frame rails using same technique as in Stages 2 and 3. In some cases the top rail extends into the brickwork at each end and these sections will have to be pulled out. The resulting holes will not be re-used and should be filled with a cement mortar mix.
Remove any remaining screws, nails, mortar fillets and mastic from the doorway surround using screwdriver, claw hammer, chisel or flat scraper as appropriate and sand over entire surface using a sanding block.
Conduct any repairs to doorway surround and plasterwork prior to fitment of new door and frame, ensuring existing fixing holes are plugged and filled and any render damage is replaced with cement/mortar mix. Once all surface repair work has fully cured, re-sand door way surround, and apply matching surface dressing if desired.
In the case of an external door, check for soundness of overhead lintel or load transferring structure above doorway before fitting door. Check also that there is a damp proof course fitted directly below the level of the old sill. If either are damaged or missing these must be replaced/ fitted before continuing. If the brickwork cavity beneath the sill is exposed, fill with foam insulation.
Trial fit new door sill section squarely within door frame to ensure good fit ensuring external lip sits flush against external brickwork, check alignment using framing square. Drill sill in situ using a high speed drill setting using 10mm HSS bit.
With drill on hammer setting and 10mm masonry bit attached, drill through sill into underlying structure to a depth of 100mm, insert frame fixing bolts through sill and screw tightly using posi-drive screwdriver.
Align external edge of door to brickwork. Mark position of fixing holes On to sill and drill with 3mm HSS drill bit and fix locator strip using 10mm self tapping screws.
Using a helper, ensuring door is securely locked into frame and correctly oriented, offer up door and frame assembly into door opening, first locating underside of lower frame and then rotating door assembly into the fully upright position within the doorway.
Adjust frame into position and support using wedged shims of the appropriate size, ensuring the frame sits centrally within the doorway and is wedged beneath the lower frame rail to raise frame up towards door lintel. Position shims in the frame fixing positions shown so as to avoid forcible distortion of frame once frame fixings are installed and tightened.
Using construction spirit level, ensure frame verticals and horizontal rails are level, square and true in all planes and verify correct frame alignment by taking diagonal measurements across frame (if frame correctly squared these will return an identical measurement). Ensure secure positioning of all packing shims following any necessary frame re-adjustment.
Ensuring the weight of the door is supported, using the key unlock and open the door from its frame and test correct frame alignment by repeatedly opening and closing door and operating lock mechanism. If correctly aligned the door should swing freely without resistance, close uniformly on all faces and lock mechanism will be smooth.
Continuing to support door weight, fully open door and securely support the opening edge using a door wedge, to ensure no lateral load is transmitted to the door hinges and frame. Re-check alignment with spirit level if any movement is suspected.
Drill fixing bolt access holes into the frame at three positions using a 12mm HSS bit on a high speed drill setting. Avoid making fixings holes within 20mm of lock/ shoot bolt striker plates along the frame opening edge and the same standoff should be maintained from hinges on the door fixed edge.
Using 10mm HSS bit on a high speed drill setting, drill through each of the fixing bolt access holes and through the second layer of the frame using 10mm masonry bit on hammer drill setting, drill through frame and 100mm into surrounding structure at all positions including up through lintel for support.
Fully insert frame fixing rawl plug through frame into fixing holes, insert fixing screw and tighten with posi drive screwdriver. Tighten fixings, ensure throughout that frame remains square. Care should be taken not to over tighten the fixings to avoid frame distortion as this may be detrimental to door functionality.
Repeat stages 17 to 18  for the remaining frame fixing points. In some cases the overhead lintel construction may require an alternative fixing position/type, in which case seek advice from a specialist hardware or fixings supplier. Should appropriate upper fixtures need to be ordered, in the interim period the doorway will remain functional and secure even without upper fixtures being in place.
With all frame fixings correctly tightened there should be no frame movement at all. If there is any movement, loosen the screws and shim the frame tighter trying to maintain approximately 5mm gap around the whole frame assembly, before re-tightening fixing screws. Remove any swarf or burring from fixing process and insert colour coded screw caps over all screw fixing points.
Score any protruding shims with a utility knife and snap them off flush with the new door frame. You also can use a fine saw blade to cut them, providing care is taken not to cut into the frame.
Unpack internal door handle and fit according to manufacturer instructions. To fit; locate spindle through square hole in lock
mechanism, align projecting pins with pre-drilled holes in door face and whilst ensuring spring washers are correctly positioned, secure handle using fixing screws supplied. Test operation of door lock mechanism and handle.
Unpack and install door furnishings in pre-drilled locations using manufacturer supplied instructions.
Use a cement mortar mix to fill in any gap between the lower sill and wall face taking care not to get mix onto either door or frame as this could be damaging to the surface.
Use a caulking gun to carefully apply silicone sealant around the perimeter of the door frame, ensuring the barrier is of adequate depth/density to prevent air leakage or water ingress. It is imperative not to seal over drainage slots within the lower door frame rail whilst carrying out this task. Please note that solvent cleaners such as those typically used for cleaning off excess silicone sealant are damaging to the surface of the door and frame, therefore unless the installer is highly proficient at caulking application it is suggested to apply masking tape to the frame edges prior to carrying out this task.
Thoroughly clean door using warm soapy water to remove grease marks and dirt, ensuring drainage paths within door sill are clear of debris and have not been sealed over.