Window Installation: How Long It Takes and What to Expect

Fitting a single replacement window is typically a job of a few hours. A whole house of windows is typically fitted over one to a few days, depending on how many openings there are, how easy they are to reach and whether any bays or large frames are involved. The longer part of the process is the wait before installation, while your made-to-measure windows are manufactured. We give you a realistic fitting date once you order rather than a promise we cannot keep.

Those are general industry timings, not a guarantee for every house. Access, upstairs openings, render or stone reveals and the condition of what is behind the old frame all play a part, and we talk them through at survey so there are no surprises.

A surveyor visits, measures each opening precisely and looks at the reveals, sills and brickwork. This is where styles are agreed: casement, flush casement, tilt and turn, bay and bow or fixed lights, plus colours, handles and glass such as Planibel A low-e or obscure glass for a bathroom. Every window we supply is uPVC and made to measure, so accurate measurements matter more than anything else.

You receive a written quote. If you want to spread the cost, finance is available through our FCA-authorised arrangement (FCA 1055332).

Once you order, the windows are built on Eurocell frames to the surveyed sizes. Because each one is made for its opening, this stage takes time and is where most of the overall lead time sits. We book your fitting date when we know the windows will be ready.

Installers protect floors and furniture near each opening, then work one window at a time so the house is never left open for long. The old frame is cut out, the opening is cleaned and checked, and the new frame is fixed, levelled and packed. The glass is fitted, sashes adjusted so they open and lock smoothly, and the gaps around the frame are sealed inside and out.

Some minor making-good around the reveals is normal where old frames were fixed with mortar or foam. We tidy as we go and take the old windows away. Before we leave, we show you how the handles, locks and any tilt and turn or restrictor settings work.

Our installers are FENSA and CERTASS registered, so the work is self-certified under Building Regulations. You receive the certificate afterwards; keep it with your house documents, as it is usually asked for when you sell. The windows carry manufacturer guarantees covering the profile, hardware and sealed glazing units.

Clear sills and move furniture a short distance from each window. Take down blinds and curtains if you can. Let us know about alarms, pets and parking. If you work from home, tell us which room you need first or last and we will plan around it.

People are sometimes surprised that the fitting is quick but the overall process takes longer. The reason is that nothing is taken off a shelf. Each frame, sash and sealed unit is produced to the measurements taken at your survey, then checked before it is delivered. That is what lets a made-to-measure window sit neatly in an older or irregular opening. Once the windows are ready, the installation itself is the fastest part of the whole project, and we keep you informed about the fitting date as manufacture progresses so you can plan around it.