Adhesive and Substrate Questions Checklist

Write down what is currently on the floor or wall and what you believe sits under it, including any covering that was left in place rather than removed when the last finish went down.

Layers accumulate quietly in older homes, and an installer plans preparation very differently depending on what has to come off first.

Note what anyone has already seen where a carpet edge, a loose tile or a skirting has been lifted, and photograph it before it is put back.

A small opened corner is often the only evidence available before work starts, and it is easily lost once the edge is refitted.

Record what the background itself appears to be, such as timber boards, a poured base, plaster, board or masonry, and mark where it changes across the area.

Suppliers ask this early, and an honest description saves a wasted visit even when it is only your rough impression.

Confirming what a background actually is, and whether it is sound, is a matter for a qualified professional rather than a visual guess.

Sketch the area roughly and mark where the background changes, such as an older floor meeting a newer section, or a chimney breast meeting a plastered wall.

A single surface is frequently more than one construction, and the joins between them are where finishes most often crack or lift.

Ask a qualified professional to establish whether pipes, cables or heating elements run within the background before any preparation is planned, and record what they tell you.

Preparation can involve cutting, screwing or grinding into a surface, so what lies inside it matters before anything is agreed.

Nothing on this page can tell you what is inside a wall or floor; that is a question for qualified professionals with the right equipment.

Note any patch, infill or repair you can see in the background, including areas that sound or feel different underfoot, and mention each one to the supplier.

Patched areas often behave differently from the surrounding background, and they are a common reason a finish fails in one small place.

Write down any history of damp, leaks, spills or flooding affecting this area, including anything that happened before you moved in, and share it before options are discussed.

A supplier can only allow for a history they have been told about, and old events rarely appear on any paperwork.

Ask whether any newly laid base is still releasing moisture and what has to happen before a covering can be considered over it.

Freshly laid bases carry water long after they feel firm, and covering one too early is a well known source of later problems.

Whether a base is dry enough is established by a qualified professional using proper measurement, never by touch or appearance.

Note whether the area sits at ground level or below it, and mention any part of the floor that feels cold or damp in wet weather.

Ground contact changes the moisture question entirely, and owners usually notice the seasonal pattern long before anyone measures anything.

Ask whether a moisture assessment of the background is planned, who carries it out, and what happens to the sequence of work if the result is not what was hoped.

Knowing the answer in advance avoids a decision being made under pressure on the day a covering was due to go down.

Interpreting any moisture measurement is for a qualified professional; treat what you observe yourself as a prompt to ask, not a conclusion.

Describe how much water the finished surface will actually meet, such as splashing, standing water, mopping or an occasional wipe, and record what you told the supplier.

Exposure changes which backgrounds and bonding methods a supplier will consider, and vague descriptions produce vague advice.

Note how well the area can be ventilated and whether heating will be running while the work happens, since both affect how a background behaves.

Installers often ask about conditions in the room, and the household is usually the only source of an accurate answer.

Note any floor that feels springy, bounces when someone walks past or makes a cupboard door rattle, and describe exactly where it happens.

Bounce is one of the few things a household notices in ordinary use without any equipment at all, and it bears directly on whether a rigid covering stays intact.

How much movement a rigid covering can live with is for a qualified professional to establish; treat what you feel underfoot as a reason to ask rather than an answer.

Photograph any existing crack in a wall or floor, note whether it appears to be changing, and raise it before a rigid finish is chosen for that surface.

A crack that is still moving tends to reappear through whatever is placed over it, so it belongs in the conversation early.

Ask a qualified professional what a crack indicates and whether it needs attention before any covering over it is planned.

Say whether the background is heated, and ask what a heating system underneath means for the material, the bonding method and how the surface is brought into use.

Heated backgrounds expand and contract in cycles, and both the covering and the way it is fixed are usually chosen with that in mind.

Note whether the floor is boarded, whether boards move individually, and whether anything has previously been screwed down to quieten them.

Individual boards moving is a different problem from a floor flexing as a whole, and what each one calls for tends to differ.

Ask whether the size of the pieces you like makes the flatness question harder, since larger units usually leave less room for an uneven background.

Owners often choose a format for how it looks and only later hear that it brings a preparation requirement with it.

Ask, in a recently built or recently altered property, whether any settlement or drying movement is still expected in the area being finished.

New construction keeps moving for a while, and the sequencing of a finish is sometimes reconsidered because of it.

Ask who is responsible for preparing the background, and agree in writing whether that sits with the installer, another trade or with you.

Preparation is the most common gap between two parties, and each frequently assumes the other has allowed for it.

Ask what flatness the material needs from the background and how any shortfall would be dealt with, then write the answer down rather than relying on memory.

Levelling is often the item that surfaces late, and understanding it early keeps the decision in your hands.

Ask what removing the existing covering involves, where the waste goes, and whether the background is likely to need making good afterwards.

Lifting an old finish frequently damages what is beneath it, and the making good is easy to leave unspoken.

In older properties, ask a qualified professional about what earlier materials may contain before anything is disturbed or removed.

Mention any polish, sealer, paint or residue applied to the background in the past, since old surface treatments can affect what will bond to them.

A background that looks clean can still carry a treatment that stops an adhesive gripping, and only the household knows the history.

Note what a build-up of preparation plus new material would do to the finished floor level, and check it against door swings, thresholds and the bottom step of any stairs.

Height changes are simple to think about now and awkward once doors no longer clear the floor.

Ask whether the background needs any preparatory coat before the adhesive, and record what the supplier says about which products are intended to work together.

Preparatory coats are chosen to suit a specific background, and substituting one is a decision that belongs with the manufacturer.

Ask the supplier to confirm that the bonding method suits both the material you have chosen and the background it will be fixed to, not the material on its own.

The background half of the question is the part that most often goes unasked, and it is where disagreements later begin.

Ask what happens if the material guidance and the adhesive guidance do not say the same thing, and request the reconciliation in writing.

Two sets of instructions from two manufacturers can disagree, and a written answer protects you from an unrecorded decision on site.

Resolving a conflict between two sets of manufacturer instructions is for the suppliers and a qualified installer to settle in writing.

Ask which backgrounds the manufacturer excludes for this material, and note them, because exclusions are usually more informative than the general guidance.

What a manufacturer declines to cover shows where the real limits are, and it is rarely on the front of a brochure.

Agree in writing that you are told if a different adhesive, preparatory coat or fixing method is used from the one discussed, and ask why the change was made.

Substitutions happen for practical reasons, but an unrecorded change can quietly undo a condition attached to the material.

Ask how edges, upstands, thresholds and any mechanical fixings are dealt with, since these are the points where a bonded surface most often lets go.

The open field of a surface usually behaves; problems concentrate at the perimeter and at junctions with other materials.

Ask whether the layout needs any deliberate breaks or flexible joints and where they would fall, then look at those positions against the pattern you want.

A deliberate break has to land somewhere, and choosing that position alongside the pattern you want is far simpler than accepting wherever it happens to fall.

Ask what ventilation the products being used call for, and work out in advance which windows and doors would have to stay open in that part of the house.

Ventilation is easy to agree in principle and awkward to arrange once the work is already under way.

Tell the supplier and installer who will be in the property during the work, including young children, pets and anyone with breathing sensitivities.

Precautions differ, and the people affected are something only the household can describe accurately.

Health precautions around any product are for the manufacturer and a qualified professional to set out, based on what you tell them.

Ask whether any smell is expected to linger after the work, and note the answer, so nobody is caught out by a freshly finished area that still needs air.

Residual odour is common and usually temporary, but it unsettles households when it was never mentioned in advance.

Ask what has to happen before the surface can take furniture, foot traffic or water, and write down the sequence rather than the impression you formed.

Bringing a surface into use before it is ready is one of the more avoidable ways a new finish is spoiled.

Agree how adjacent finishes, doorways and stair edges are protected while adhesives and preparation products are being used nearby.

Splashes and tracked residue travel further than expected, and protection is much easier to agree beforehand than to put right afterwards.

Ask where unused adhesive, preparatory coats and cleaning products will be kept during the work, and what happens to any leftovers at the end.

Part-used containers are frequently left behind, and it is worth knowing what should be retained and what should not.

Photograph the prepared background across the whole area before anything is fixed over it, including the perimeter and any patch that was made good.

Photographs are the only record of a background once it is covered, and they take moments to capture at the right point.

Write down the references of the adhesive, preparatory coat and any levelling product actually used, and ask for them rather than assuming they will be remembered.

If a problem appears later, the first question asked is what was used, and nobody can answer that from the finished surface.

Agree in advance what happens if the background turns out to be in poorer condition than expected once the old covering has been lifted.

This is the most common mid-project surprise for coverings, and agreeing the process calmly beforehand is far easier.

Ask what any material or installation warranty depends on in terms of the background, and keep the written conditions with your project papers.

Conditions frequently rest on preparation steps, and they are only useful to you if you hold them in writing.

What a warranty covers is defined by the manufacturer and installer in writing; treat verbal reassurance as unconfirmed.

Ask what an installer needs to know about the background before they can comment, then gather it once rather than answering the same questions twice.

Installers tend to ask a consistent set of questions, and having the answers ready shortens the conversation considerably.

Keep the background photographs, product references and written answers together, so a future repair conversation does not have to start from nothing.

Whoever deals with this floor or wall in future is rarely the person who laid it, and the record is what carries the knowledge over.