Northamptonshire · England

Aluminium Windows in Northamptonshire

Planning an extension or renovation in Northamptonshire? We can supply and fit aluminium windows made to your sizes, with dual-colour frames and glass chosen room by room.

Guide from £925
7 towns covered
Postcode areas LE, MK, NN, OX, PE

Replacement aluminium windows in Northamptonshire

Upper-floor windows may need to work as escape routes. In England, Approved Document B guidance for an escape window is an unobstructed openable area of at least 0.33 m², at least 450mm high and 450mm wide, and no more than 1100mm from floor to the bottom of the opening.

Aluminium windows can be fitted with trickle vents in the frame head, which matters because in England, Approved Document F expects ventilation after window replacement to be no worse than before. The glazier records the existing vents at survey and sizes new ones to suit each room.

Large aluminium windows that reach low down, such as floor-to-ceiling glazing, need safety glass. In England, Approved Document K treats glazing within 800mm of the floor as a critical location, so those panes are usually toughened or laminated and permanently marked to show their safety classification.

Aluminium is strong enough to hold large, heavy glass units in narrow frames, so sightlines are slimmer than uPVC of the same size. That means more glass and more daylight from the same opening, which suits modern extensions, wide picture windows and slim replacements for old steel windows.

White rendered house with slim grey aluminium windows and a large picture window

Towns we cover for aluminium windows in Northamptonshire

Choose your town for local details, nearby areas and the postcode districts we cover.

What applies in Northamptonshire

Approved Document K requires safety glass in critical locations in England: glazing in doors and in side panels within 300 mm of a door, up to 1500 mm above floor level, and any glazing in walls or partitions up to 800 mm above floor level.

Approved Document F covers ventilation. Replacing windows should not leave a room with worse background ventilation than before, which is why replacement windows often include trickle vents.

Northamptonshire is inland, around 66 km from the nearest coast at its closest point, so salt exposure is rarely a factor.

Large aluminium units are heavy, so city jobs need planned unloading, parking and sometimes lifting gear or extra hands for upper floors. Flats need freeholder consent and planning permission, and conservation areas often control frame colour and glazing bar patterns.

Guide prices

Guide prices inc VAT for typical jobs. Remote and island locations are quoted by arrangement. Your written quote fixes the price after measuring.
Typical job	Guide price inc VAT
Casement window, 900 × 1050 mm	£925 – £1,195
Casement window, 1200 × 1200 mm	£1,095 – £1,395
Large window, 1800 × 1500 mm	£1,495 – £1,995
Slimline heritage style, 1200 × 1200 mm	£1,295 – £1,695

Choosing your aluminium windows

Casement windows

Side-hung, top-hung or fixed sashes in slim aluminium frames, suiting most houses and extensions, with flush or stepped sash designs.

Tilt and turn

Inward-opening sashes that tilt for secure ventilation or swing open for cleaning and escape, useful for flats and high floors.

Flush casement

Sashes sit level with the outer frame for a clean, timber-like look, often chosen for period-style or contemporary homes.

Dual-colour powder coat

A different colour inside and out, such as anthracite grey outside with white inside, from a wide range of RAL colours and textures.

Aluminium Windows in Northamptonshire: questions

How long does it take to install aluminium windows?

Most single windows are fitted within a day, and a typical house takes a few days on site depending on the number of windows and the access. The longer part is manufacturing, because frames are cut, coated and glazed to the survey sizes. The expected lead time is confirmed in writing when you accept the quote.

Are aluminium windows better than uPVC?

Neither is better for every home; they suit different priorities. Aluminium gives slimmer frames, larger glass areas, a hard-wearing powder-coated finish and a wide colour choice. uPVC usually costs less and has chunkier frames. Both can meet the energy standard for replacement windows when specified correctly, so compare the certified ratings, the look you want and the guide prices.

Are aluminium windows secure?

Aluminium windows can be very secure, because the metal is strong and the frames carry multi-point locks, internal glazing beads and lockable handles. For easily accessible windows in new homes in England, Approved Document Q expects PAS 24 security. Asking for windows tested to that standard is a good benchmark when replacing ground-floor windows in an existing home.

What guarantee do aluminium windows come with?

Manufacturer guarantees apply to the frames, powder coating, hardware and sealed units, and the terms are confirmed in writing. Coating cover often depends on the site environment and on regular cleaning, so read the conditions. Guarantee terms for the installation are set out in writing with your quote, before you agree to go ahead.

Which parts of Northamptonshire do you cover for aluminium windows?

We cover the whole of Northamptonshire, including Northampton, Corby, Kettering, Wellingborough and Rushden, and postcode areas LE, MK, NN, OX, PE. Building rules for aluminium windows here follow the regulations for England. Enter your postcode on the quote form and we will confirm cover; then a glazier will arrange a free survey before giving you a written quote.

Other glazing services in Northamptonshire

All glazing in Northamptonshire · Aluminium Windows across the UK

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