Renovation Window Replacement Questions Checklist

Give each opening a reference of your own, working room by room and elevation by elevation, and use it on every note and photograph.

A consistent reference is the difference between a clear conversation and three people pointing at different windows.

Photograph every opening straight on from inside and from outside in daylight, including a margin of the surrounding wall in each shot.

The surrounding wall shows the reveal, the sill and the junctions, which is where most of the eventual difficulty lives.

Compare the openings against each other and say which are genuinely identical and which merely look it, since existing openings are rarely as regular as they appear.

Older buildings settle and get altered, and assuming a repeated opening is repeated exactly causes trouble at measurement.

Write down which floor each opening is on and what lies beneath it outside, whether a path, a lower roof, a flowerbed or a drop.

What is underneath governs how the opening can be reached from outside, which affects both the work and later cleaning.

List any opening that is hard to reach from inside because of a fitted unit, a bath, a radiator, a worktop or a staircase.

An opening you cannot stand in front of is a different proposition from one you can, both to use and to work on.

Record which openings you are certain about changing, which remain undecided and which are definitely staying as they are.

Being explicit about the undecided ones stops them being quietly included or excluded by somebody else.

Try each window and write down which parts actually open at present, and which have been painted, screwed or seized permanently shut.

What already opens tells you what the household relies on, which is not always what the original design intended.

Find out who opens each window and whether anybody in the household struggles to reach the handle or to hold the weight of it.

Reach and weight are ordinary practical constraints that are almost never mentioned until the new window is fitted.

Establish how the outside of each window is cleaned now, and whether that would change under a different opening arrangement.

Cleaning access is decided implicitly by the opening type and is almost never discussed until somebody first tries it.

Separate the openings used for ventilation regularly from those opened only occasionally or never at all, working room by room.

Regularly opened windows deserve more attention to handle position and opening type than ones that are effectively fixed.

Look for any window that opens outwards over a path, a walkway, a shared area or a seating area outside.

Whether an opening may swing over a path or shared area may be subject to local requirements; confirm what applies with the relevant authority.

Record any opening a child could reach, and note what you would want from it as a result.

Restrictors, opening limits and anything relating to child safety must be settled with a qualified professional against local requirements.

Photograph each whole elevation from the street or garden, so the relationship between the openings is recorded rather than only each window alone.

Windows are read together from outside, and the rhythm between them is the thing most easily lost in a replacement.

Describe the frame proportions, the position of any glazing bars, and how much of each opening is frame rather than glass.

Frame proportion is what makes a replacement look right or wrong, and it is difficult to describe afterwards from memory.

Look at whether the frames sit flush with the outer face of the wall or are set back into the reveal, and say roughly how far.

How deeply a frame sits changes the shadow on the elevation, which is a large part of how the building reads.

Search out any coloured, textured, leaded or patterned glazing and write down exactly where it is, before it is lost simply because nobody mentioned it.

Original or unusual glazing is routinely discarded during removal for no reason other than that nobody said it mattered.

Record whether neighbouring properties in the same terrace, pair or row have already been changed, and how those changes look now.

The surrounding buildings show what various choices actually look like once weathered, which no brochure can do.

Note whether the property or the area may carry additional constraints on how the openings look from outside.

Whether any designation or additional requirement affects window changes must be confirmed locally with the relevant authority before ordering.

Note what the internal reveal is finished in for each opening, whether plaster, a timber lining, tiling or panelling.

Reveal finishes are disturbed by almost every replacement, and the harder ones to repair are worth flagging in advance.

Examine the internal and external sills at each opening and write down anything loose, cracked, missing or previously repaired.

Sills carry water away and are frequently in worse condition than the window, which changes what the work involves.

Note where curtains, blinds, poles or shutters are fixed, and whether each fixing goes into the frame itself or into the wall around it.

Fixings into the old frame disappear along with it, and replacements often cannot be fixed in the same place.

Record what is fitted immediately below each opening, such as a radiator, a worktop, a fitted seat or a run of units.

Whatever sits under a window is in the way of the work, and it is usually noticed on the morning the work begins.

Ask who makes good the internal finish and the external surround, and record the answer in writing for each opening rather than in general.

Surrounds in older properties sometimes hold materials needing particular handling; have a qualified professional look before removal is planned.

Note any decoration or detail around an opening that you would not be able to replicate if it were damaged during removal.

Irreplaceable detail is worth naming before the work rather than mourning afterwards, and it may change how removal is done.

Ask which openings are relied on for escape, and what that means for how they open and where the handle has to sit.

Escape provision is a life safety matter governed by local requirements, and only a qualified professional can advise on it.

Ask which positions call for particular glazing because of what is near them, such as a door, a low sill or a stair.

Where safety glazing applies is set by local requirements and must be confirmed by a qualified professional rather than assumed.

Ask what background ventilation each replacement is assumed to provide, and how that compares with whatever exists at present.

Ventilation provision associated with replacement openings must be confirmed by a qualified professional against local requirements.

Ask what happens where an opening sits above a stair, a landing or a drop, and who determines what is needed there.

These positions carry particular considerations that are easy to overlook when the openings are discussed as a set.

Note any opening in a room containing an appliance that burns fuel, and raise it explicitly rather than assuming it is unrelated.

Any interaction between openings and an appliance burning fuel must be settled by an appropriately qualified professional.

Write down every answer you are given on these subjects, together with the name and role of whoever gave it to you.

These are the answers most likely to be revisited later, and an attributed note is worth far more than a recollection.

Ask what happens if an opening cannot be closed again immediately, and what protection would be provided in the meantime.

Temporarily open positions are ordinary and manageable, but only when somebody has agreed in advance who covers them and how.

Note which rooms hold things that cannot be exposed to weather or dust, and arrange for those things to be elsewhere beforehand.

Dust travels much further than people expect, and clearing a room afterwards is far harder than clearing it in advance.

Check whether any opening is reachable from a flat roof, a bin store, a boundary wall or a nearby structure.

Reachable openings matter for both the working period and for what you want from the finished window.

Ask what the existing security arrangement relies on and whether anything is fixed to or wired into the window frames themselves.

Contacts and connected security equipment must be dealt with by whoever maintains the system rather than disturbed during removal.

Note which openings face the prevailing weather where you live and would therefore be the worst ones to have open.

Sequencing around the weather side of a building is a reasonable thing to raise and is rarely thought about by anyone else.

Record who is responsible for the property while openings are unfinished, and what your own cover requires you to tell anyone.

Speak to your insurer about what your cover requires while any opening in the property is temporarily unfinished.

Record for each opening what opens, which way it opens and where the handle sits, because this is settled at the order and not afterwards.

Opening direction is the decision owners most often assume can be adjusted later, and it is precisely the one that cannot.

Decide and record the finish inside and outside for each opening, including whether any of them are deliberately different.

Different finishes on the two faces are entirely normal, but only when somebody wrote it down before the order.

Record whether any existing glazing, ironmongery or shutters are being kept, and who is responsible for storing them safely.

Anything being kept has to be removed carefully and put somewhere, which is a task that needs an owner rather than an assumption.

Note who carries out the final measurement, at what point it happens and what has to be settled before it does.

Final measurement is a hard cut off, and any decision still open at that moment gets made by somebody other than you.

Establish where the old frames, glass and packaging go once each opening is finished, and whether anything is being left on site between visits.

Glass and old frames stacked against a wall between visits are both a nuisance and a hazard, which is why their destination is worth agreeing at the start.

Ask which documents will exist for the finished openings, including anything relating to the glazing itself, and where each of them ends up.

Requirements for recording or notifying replacement openings are set locally; ask the relevant authority and a qualified professional what applies here.