Window Repair near you

Misting between the panes is a failed sealed unit: the edge seal has let moisture into the cavity, and no amount of cleaning reaches it. In most cases the glass unit alone can be swapped while the frame, hinges and locks stay exactly where they are. It is worth asking for that by name, because a quotation for a whole elevation will not always mention it.

Draughts, sticking and failure to lock usually come down to hardware and alignment rather than the frame: hinges and friction stays that have dropped, gaskets that have hardened, multipoint mechanisms out of line with their keeps, or a frame that has moved slightly since it was fitted. Timber decay is different again, and is often local — water sitting on a cill or in an open joint — which is why splicing in new timber can be a genuine repair rather than a delaying tactic.

Water on the room side of the glass is not a window fault at all in most cases. Government guidance defines condensation damp as moisture generated inside the home cooling and condensing onto colder parts of the building, giving window frames as an example, and separates it from penetrating damp, which is water getting in from outside through defects in walls, roofs, windows or floors. The same guidance asks whether windows have trickle vents and whether they are being kept open and unblocked. Taping a trickle vent shut to stop a draught reliably creates a mould problem somewhere else in the room.

Repair is the proportionate answer when the frame is sound and a component has failed, when the window is original to a period house, when only one or two units have misted, or when planning constraints point that way. It is also the answer when money is tight and the whole elevation cannot be done at once, since hardware and glass can be dealt with window by window.

Replacement earns its place when decay or distortion runs through the frame rather than sitting in one member, when obsolete hardware can no longer be matched, when repeated repairs have not held, or when the openings themselves need to change — a bedroom that needs an escape-sized opening being the clearest case. The regulatory consequence follows the work: a full replacement is notifiable and should produce a compliance certificate, while a like-for-like repair generally is not notifiable at all.

Re-glazing is where a repair meets the Building Regulations. Approved Document K covers protection from falling, collision and impact in England and took in the glazing guidance previously held in Approved Document N. The Planning Portal identifies the critical locations as any panel up to 800mm from floor level, any glazed door up to 1500mm from floor level, and any side panel within 300mm of the edge of a door up to 1500mm from floor level. A pane being replaced in one of those positions has to be safety glazing, whatever was there before — and single annealed glass low down in a Victorian door is exactly the case this rule exists for.

Heritage constraints are the other trigger. National planning practice guidance is clear that any works to alter or extend a listed building in a way that affects its character as a building of special architectural or historic interest require listed building consent, and that even minor works have the potential to cause substantial harm depending on their impact. Repairing and draught-proofing original joinery, or adding secondary glazing behind it, is frequently the route that gains consent where replacement would not.

Scotland and Northern Ireland run their own systems: a building warrant granted by a local authority verifier under the Building (Scotland) Act 2003 in the first case, and technical booklets administered by district councils in the second, where Technical Booklet V covers glazing. Ask locally before assuming an England and Wales position.

Upper-floor windows are the reason window repair has a safety conversation attached. The Work at Height Regulations 2005 exist, in HSE's words, to prevent death and injury caused by a fall from height, and they require work to be properly planned, supervised and carried out by competent people, with risks assessed and appropriate equipment used. HSE's position on ladders is that they can be used for work at height when a risk assessment has shown that equipment offering a higher level of fall protection is not justified because of the low risk and short duration of use, that they should only be used where they will be level and stable and can be secured where reasonably practicable, and that if a task would require staying up a leaning ladder or stepladder for more than 30 minutes at a time, alternative equipment should be considered.

Old paint is the risk homeowners never think about. HSE states that lead pigments were widely used in paints for homes, schools and offices until the 1960s and that lead was not removed from all commonly used paint until the early 1980s, and it lists stripping or preparing leaded paint from doors and windows among the activities of particular concern, controlled under the Control of Lead at Work Regulations 2002. Sanding or burning off old window paint in an occupied house is not a job to improvise, and dry sanding is precisely the wrong approach.

Broken glass deserves the same caution. Handling, breaking out and disposing of glazing is work for someone equipped for it, and a cracked pane in a door or a low-level panel should be made safe and then replaced with the correct safety glazing rather than patched.