Glass and Mirror Questions Checklist

List every place glass or mirror is being considered, and describe each one in plain terms including height, what is beneath it and what is beside it.

A written list prevents positions being discussed piecemeal with different people at different moments.

Note who uses each space, including small children, older relatives and pets, and say so when you describe the position to a professional.

The people around a pane are part of the description a professional needs, and owners rarely think to mention them.

Ask a qualified professional what type of glass they would use in each position and what the relevant local requirements are for that situation.

Glass type is a technical decision, and asking the question properly is the useful thing an owner can do.

What glass belongs in any position must be established by a qualified professional and confirmed against the relevant local requirements.

Point out any pane beside a door swing, at the bottom of a stair, or along a route people carry things through.

Impact happens where movement and glass overlap, and those overlaps can be identified before anything is ordered.

Say plainly which panes are in a shower, behind a hob, beside a bath or in an unheated room, since each raises different questions.

These positions are treated differently by suppliers, and a vague description gets a vague answer.

Ask what the wall or structure behind each pane is made of, and record that answer before fixings are discussed.

The background decides how a pane can be held, and it is not always what the surface suggests.

How any pane is supported or fixed is a matter for a qualified professional, never an owner assumption from a page.

Ask to see a sample of the actual glass over a white sheet, and look at the edge, so you can see what tint the glass carries.

Ordinary glass carries a colour that becomes obvious against a pale background and along the edge.

Ask whether a clearer, lower iron glass is available for this position and hold a sample of each over the same background.

The difference is subtle in isolation and unmistakable when two samples sit side by side.

If a colour is being applied behind glass, ask to see the exact colour with the exact glass over it before approving anything.

A pale or cool colour seen through glass tint can end up quite different from the sample that was chosen.

Ask whether the thickness proposed changes how much tint you see, particularly on shelves and anywhere an edge is on show.

Edges concentrate the colour of glass, so an exposed edge is where tint is most visible.

For obscured or textured glass, ask how much can be seen through it at close range, and look at a full sample rather than a small piece.

Privacy from a texture depends on distance and lighting, and a small sample does not represent it.

Ask whether the mirror is a plain or a tinted type, and view a sample against the wall colour the room will actually have.

A tinted mirror changes how skin tones and paint colours read, which matters most where people get ready.

Ask which decisions have to be final before the glass is made, including size, holes, cut-outs, notches and edge finish.

Toughened and processed glass generally cannot be cut or drilled afterwards, which surprises owners repeatedly.

List every hole and cut-out the pane needs, for sockets, brackets, hinges, taps, shower fittings and anything else, and check the list against the fitter.

A single missed hole means a new pane rather than a small adjustment on site.

Ask what edge finish is proposed for each visible edge, and handle an example rather than accepting a description.

Edge finish is both a look and a matter of how the edge feels to the hand as people pass it.

Ask how corners are treated where a pane meets a wall that is out of square, and whether the shape would be templated on site.

Walls are rarely square, and a rectangular pane in a non-square opening leaves a visible tapering gap.

For any pane going onto a wall, ask what sits behind the surface at the fixing points before holes are located.

Cables and pipes run in walls, and the fixing pattern is decided long before anyone drills.

What lies behind a wall and where fixings can go must be established by a qualified professional before any drilling.

Ask for a drawing or a written schedule of each pane, check it slowly against the room yourself, and keep a copy.

The drawing is the last easy moment to catch a misunderstanding about a size or a hole position.

Ask what the mirror backing is and whether the type proposed is intended for a bathroom or another damp room.

Mirrors are produced in different grades, and the difference only becomes visible once deterioration starts.

Whether a mirror suits a damp position is for the supplier and manufacturer to confirm for that specific product.

Ask what the dark spotting that appears at mirror edges is caused by, and what reduces the chance of it in the position you have in mind.

Edge deterioration is the classic bathroom mirror complaint and it usually begins where moisture reaches the back.

Ask what will be used to fix the mirror and whether that product is compatible with the mirror backing, then get the answer in writing.

Some adhesives attack mirror backing over time, and the damage appears as marks visible from the front.

Compatibility between a fixing product and a mirror backing must be confirmed by the supplier and installer, not assumed.

Ask whether any gap or ventilation behind the mirror is proposed, and how moisture that reaches the back would dry out.

A mirror sealed tightly against a damp wall has no way of drying, and that is where problems concentrate.

Ask what condition the wall behind needs to be in before a mirror goes on it, and who is responsible for getting it there.

Mirror shows every undulation in the wall behind it, and preparation responsibility is often left unassigned.

Stand where the mirror will be and look at what is directly opposite, then decide whether you want that doubled in the room.

Owners regularly end up reflecting a lavatory, a radiator or the back of a door without having noticed.

Note the height of everyone who will use the mirror and consider what each of them would see in it.

A mirror positioned for one person can be useless for a child or an adult of a different height.

Consider what light falls on your face at the mirror, and whether the mirror mainly reflects a window, a ceiling light or nothing useful.

Light in front of the person matters far more than light near the mirror, and this is settled at planning stage.

Ask whether any distortion is normal in a mirror of the size proposed, and look at a large example rather than a small one.

Large panes can show slight waviness, and it is better understood in advance than reported as a fault.

Mark the mirror outline on the wall with tape and live with it for a while before the size and height are confirmed.

A taped outline settles disagreements about scale and height that a drawing on paper never seems to settle.

Ask what dried water leaves on the glass in your area, and how that changes on a shower screen used every day.

Shower glass is the most complained about surface in a bathroom and the cause is nearly always dried water.

If a treatment or coating is offered, ask what it actually does, what it does not do, and what would remove it.

Coatings reduce marking rather than eliminating it, and they can be worn away by the wrong cleaning routine.

Decide whether the household would realistically wipe a screen after use, and choose knowing the answer rather than hoping.

The habit, not the product, is what keeps shower glass clear, and it is worth being honest about it.

Ask which cleaning products should be kept away from the glass, any coating and the surrounding frames or seals.

Products that clean glass can attack the seals and metal around it, which is where leaks begin.

Ask how a mirror should be cleaned so that liquid does not run to the edges and reach the backing.

Spraying directly onto a mirror sends cleaner to the edges, which is exactly where the backing is vulnerable.

For dark, painted or mirrored panels in a busy area, press a hand on a sample and see how obvious the marks are.

Dark reflective panels record every touch, which matters beside a door or a switch position.

Walk the route a large pane would take from the street to the room, noting stairs, turns, low ceilings and door widths.

A pane that fits the opening but not the staircase is a well known and entirely avoidable problem.

Ask how many people are needed to handle each pane and what has to be clear on the day it arrives.

Handling arrangements affect what else can be happening in the property at the same moment.

Agree in writing who is responsible if a pane is damaged in transit, during handling or while other trades are working nearby.

Glass passes through several hands, and responsibility is far easier to settle before anything breaks.

Put in writing which party carries the risk if a pane is broken before it is fixed in position, and who then arranges its replacement.

Record exactly what was supplied for each position, including the glass description, thickness, edge finish and any coating.

A replacement pane has to be described precisely, and this record is what makes that possible.

Ask what protects the glass between installation and the end of the works, and who is responsible for keeping it in place.

Glass fitted early is at risk from every other trade still moving through the room.

Ask what seals, gaskets or trims are used around each pane, whether they can be replaced separately, and how they are cleaned.

Seals wear out well before the glass does, and knowing they are replaceable changes how you treat them.