Glued or floating parquet: choose installation from the existing conditions

Installation is a system decision

Fully bonded parquet is attached to the prepared substrate using an approved adhesive system. Floating parquet remains separate from the substrate; its elements are joined together and rest on a suitable underlay. This describes the construction, but does not yet establish which option suits a particular room.

In existing buildings, new materials meet existing screeds, old finishes, doors, stairs, fitted furniture and possibly unknown repairs. Comparison therefore starts with the actual floor and selected parquet product. Comparing practical consequences is useful only when both methods are permitted for that precise product, substrate and room geometry.

Both methods require substrate assessment

Floating installation does not allow the existing substrate to remain unchecked. Underlay can compensate only for small deviations covered by its technical specification; it replaces neither a load-bearing surface nor assessment of moisture, cracks or loose areas. Old textile or resilient finishes must not automatically be assumed suitable either.

Fully bonded installation adds the adhesion of the whole system to the general assessment. ISP’s substrate-preparation factsheet distinguishes screed and panel types and requires compatible primers, levelling compounds and adhesives. Depending on findings, extra mechanical cleaning, removal of weak layers or a trial bond may be needed. Include these services in the quotation beforehand, rather than as a site surprise.

The key question is therefore not which method hides a defective substrate better. A reliable floor requires the existing base to meet the chosen installation requirements or to be professionally prepared beforehand.

Height, transitions and room geometry also matter

Every millimetre counts in an occupied home. Besides parquet thickness, adhesive, levelling, underlay and any moisture barriers affect finished height, depending on the method. One product dimension is therefore insufficient. The complete construction from load-bearing base to finished timber surface is decisive.

Check this height at doors, balcony exits, stairs, kitchens, fitted furniture and material changes. An extra underlay can alter a junction, as can necessary levelling. Floating floors need sufficient movement space at walls and doorways. Both methods must respect existing structural and movement joints and manufacturer requirements.

Room size, layout and laying direction are also part of approval. Long corridors, open living areas or connected rooms cannot be judged from a sample area alone. Execution planning shows where the floor continues, where a defined transition is needed and how skirtings or profiles resolve the detail.

Do not decide acoustics on one value alone

Two sound perceptions are often confused. Impact sound mainly concerns transmission into rooms below or adjoining. Walking sound describes footsteps heard within the room itself. Depending on the tested product, underlay for floating parquet may improve particular acoustic properties, but that is not a universal statement for every floor and building.

Current Bauwerk documents for floating engineered parquet specify separate indicators and test methods. Underlay compression stability and dynamic load resistance must also suit the use so that connections and flooring do not yield excessively. With full bonding, parquet, adhesive, substrate and building structure jointly affect the perceived sound.

A useful quotation therefore defines the protection objective: less noise within the room, less transmission to other rooms or a property-specific requirement. Only then can tested system values be compared. A generic promise such as ‘quiet’ is not a technical specification.

Check underfloor heating briefly, but approve it separately

With existing underfloor heating, heat transfer through the whole floor construction matters. Floating installation includes the underlay in that total; bonded installation includes parquet, adhesive and preparation layers. The method alone establishes neither suitability nor future heating output.

Heating system, screed, residual moisture, product approval, commissioning heating record and operating limits are therefore checked separately. Our detailed guide to parquet on underfloor heating explains the approval sequence. Here the rule is to compare only completely specified constructions using product values for that same system.

Assess repairs and removal realistically

Floating installation is often equated with ‘easy to remove’. That may apply to an appropriate click system, but does not guarantee damage-free reuse. Room geometry, fitted furniture, edges, connection age and removal order determine whether individual elements are accessible and reusable.

Fully bonded parquet is not automatically difficult to repair. Depending on product, connections, adhesive and damage, individual elements can be selectively replaced. ISP’s adhesive-systems factsheet also notes that some adhesive properties can make element replacement harder. Consider repair objectives and spare material when choosing the system.

For a later complete remodel, removal consequences differ more clearly: adhesive, parquet and substrate may form a solid unit and trigger additional substrate works. A floating construction separates layers, but may also be damaged or blocked by fitted furniture. If reversibility matters, record the specific removal assumptions in the comparison.

Plan work in the occupied home

The method also affects sequencing. Bonding requires substrate preparation, open times, curing and approval for subsequent works to match the system. Floating installation avoids applying adhesive but still requires a prepared base, careful junction details and protection against damage by later trades.

Occupied rooms also involve furniture, safe routes, dust protection and staged handback. A faster individual step does not automatically make the whole remodel shorter. What matters is how removal, substrate assessment, drying or repair times, parquet laying, skirtings, doors and refurnishing follow one another.

Before work starts, specify when rooms must be empty, which works generate noise or dust, when the floor may be walked on or loaded and who protects it until handover. These product-specific details belong in the programme.

Checklist for comparable quotations

A reliable quotation specifies more than square metres, wood species and installation price. It describes assessed existing conditions and the full system construction. Only then is it clear whether two providers price the same work or treat unresolved substrate and junction issues differently.

For the decision, both methods should use identical conditions: the same parquet product, rooms, substrate findings and junction objectives. If a product is approved for only one method, do not create an artificial comparison; find a genuine alternative product first or narrow the system choice accordingly.