Door Frame, Jamb And Threshold Replacement & Repair

Door jamb repair covers two very different situations: sudden damage and slow decay. A kicked-in door splits the jamb at the strike, usually along the grain, and leaves the door hanging on a frame that will no longer hold a lock. Water damage works more quietly, softening the bottom of the leg over years until the whole frame moves when the door closes.

We repair split jambs with structural splices and reinforcement rather than filler, cut out and scarf in rotted sections, refit strike plates into sound timber, and re-shim frames that have moved out of square. Where a repair won’t hold a lock securely, we’ll say so and quote replacement instead.

The threshold is the hardest-working part of any exterior door — it takes foot traffic, rain, and every temperature swing of the year. When it fails you feel it immediately as a draught along the floor and see it as daylight under the closed door.

We replace aluminium, wood, and composite thresholds, fit adjustable models where the door has dropped, and renew the sweep and perimeter seal at the same time so the whole opening seals as one system.

Exterior Door Threshold Replacement

An exterior door threshold has to shed water outward and seal upward at once. We remove the old unit, check the subfloor and framing underneath for the rot that’s usually hiding there, and set the new threshold bedded in sealant with the correct slope.

Door Threshold Seals & Sweeps

Often the threshold itself is fine and only the seal has hardened and shrunk. Replacing the door sweep and threshold insert is a short visit and immediately closes the gap at the bottom of the door.

When rot, impact, or long-term movement has gone too far, door frame replacement is the fix that lasts. It’s also the opportunity to correct whatever caused the failure — no sill pan, no flashing, a header that was never square.

We supply and fit pre-hung frames and site-built jambs in timber, engineered, and steel, set with shims and levelled on every leg, then insulated, sealed, and trimmed. The door is re-hung with an even reveal all round and a lock that engages without being lifted or shoved.

Door Jamb Replacement

Where only one leg has failed — typically the hinge side after rot, or the strike side after a break-in — we can replace that jamb alone and keep the rest of the frame and casing intact. It’s a faster, cleaner job than a full frame swap and holds just as well when the remaining frame is sound.

1. Call and describe the damage. Break-in damage and rot need different parts and different amounts of time.
2. Inspect the whole opening. Frame, jamb legs, threshold, subfloor, and the door’s fit within it.
3. Repair or replace. Splices, jamb legs, and thresholds are typically same-visit work; full frames are scheduled.
4. Level, seal, and test. Even reveal, clean latch engagement, and a sealed perimeter before we finish.