Kitchen extension screeding
Screeding.com helps homeowners, builders and renovation teams request screeding estimates and quotations for kitchen extensions, side-return extensions, rear extensions and open-plan kitchen and living spaces. Kitchen extension projects usually involve reviewing existing house floor levels, the new extension slab, floor build-up depth, underfloor heating, insulation and DPM by others where relevant, sand and cement screed, liquid screed or fast-drying screed options, and drying and moisture planning before tile, LVT, timber or stone finishes and kitchen fitting are programmed.
Based in Gerrards Cross, Buckinghamshire.
Screeding for kitchen extensions and open-plan spaces.
Kitchen extensions take many forms, from rear extensions and side-return extensions through to wrap-around and open-plan kitchen, dining and living spaces. New floors meeting existing floors, thresholds, door openings, final floor finish heights and sequencing around other trades all influence screed planning, so screed type, depth and programme are reviewed early rather than assumed. Acceptance is not assumed by project type, and each enquiry is reviewed against its own details.
Rear kitchen extensions
Rear extensions opening up the back of the house, where the new floor build-up often meets the existing kitchen or hallway at a threshold.
Side-return extensions
Side-return extensions infilling the side of a property, where narrow access, level tie-ins and UFH layouts influence screed planning.
Wrap-around extensions
Combined rear and side-return extensions creating a larger open-plan footprint with longer screed pours and more complex level tie-ins.
Open-plan kitchen/living
Open-plan kitchen, dining and living spaces where consistent floor levels and a settled final finish matter across the whole zone.
New floors meeting existing floors
Projects where the new extension floor must align with the existing house floor at doorways, openings and thresholds.
Thresholds and door openings
Internal and external thresholds, bifold and sliding doors all influence target finished floor level and screed depth.
Final floor finish height
Tile, LVT, timber and stone finishes have different thicknesses that influence screed level and tolerances.
Working around other trades
Sequencing screed with groundworks, UFH installers, electricians, plumbers and the kitchen fitter so each trade has the right conditions.
Floor levels, thresholds and build-up depth.
Kitchen extension screeding often depends on a number of interlinked factors. The points below are typical items the Screeding.com team reviews against each enquiry. Damp proofing, insulation thickness and any Building Control requirements are generally agreed by the wider project team and should be confirmed before screed type and depth are finalised.
Existing slab or subfloor
Condition, level and finish of the existing slab or subfloor should be reviewed before any new screed build-up is confirmed.
Adjoining house floor level
The adjoining house floor level usually sets the target finished floor level for the extension and therefore influences screed depth.
New extension slab level
The new extension slab level, set by the builder, determines the available build-up depth above for insulation, UFH and screed.
Insulation by others
Insulation type, thickness and supporting layers all influence screed depth and which systems can be used. These are agreed by the project team.
DPM arrangements by others
Damp proofing arrangements are typically completed by others; their detailing should be confirmed before screed is installed.
UFH pipework where used
Where underfloor heating is included, pipe coverage and screed depth are reviewed alongside the UFH specification.
Door thresholds
Internal, external, bifold and sliding door thresholds need to be coordinated with the new screed and floor finish height.
Final floor finish thickness
Tile, timber, LVT, vinyl and stone finishes have different thicknesses that influence screed level and tolerances.
Kitchen unit and island planning
Kitchen unit and island layouts can highlight level issues, so screed flatness should be reviewed against the kitchen layout where relevant.
Choosing the right screed for a kitchen extension.
The right screed for a kitchen extension depends on the new extension slab, available build-up depth, any underfloor heating, intended floor finish and the wider programme. Each option below is considered against the project specification rather than treated as a default for kitchen extension work.
Sand and cement screed
Traditional bonded, unbonded and floating sand and cement screed for kitchen extension projects where the build-up, area and depth suit a traditional system.
Liquid screed
Flowing calcium sulphate and cement-based liquid screed for kitchen extensions with UFH or larger open-plan areas, subject to follow-on finish requirements and any laitance treatment.
Screed over underfloor heating
Screed installed over UFH pipework in kitchen extensions, where cover, curing, commissioning and floor finish timing are planned together with the UFH and screed manufacturer guidance.
Fast-drying screed options
Fast-drying screed systems considered for time-sensitive kitchen extension programmes. Drying performance is system-dependent and confirmed against the specification.
Underfloor heating in kitchen extensions.
Underfloor heating is common in modern kitchen extensions, particularly in open-plan kitchen and living spaces. Pipe coverage, screed depth and manufacturer guidance all matter, and commissioning should follow the UFH and screed manufacturer guidance rather than fixed assumptions. Final floor finish and kitchen fitting dates should be planned around drying and moisture requirements so the programme is not built around unrealistic timings.
Drying times before floor finishes and kitchen fitting.
Walking on screed and fitting the final floor finish or kitchen are different milestones. Drying depends on screed type, depth, ventilation, humidity, temperature and on-site conditions. Timber, vinyl, LVT and other sensitive finishes may need moisture testing, and some liquid screed systems may require laitance removal before adhesives or floor finishes. Sequencing matters because kitchens are often fitted after floor preparation, so fixed day, week or hour readiness figures are not given before the project has been reviewed.
Read the screed drying times guide · Compare sand and cement vs liquid screed
Surface regularity and BS 8204.
BS 8204 is relevant industry guidance for screeded floors in the UK, and SR1, SR2 and SR3 describe surface regularity classes referenced in specifications. Kitchens may need closer attention to flatness because final floor finishes, islands and units can highlight level issues. The required class should be agreed against the intended final floor finish and the project specification, and is not an automatic guaranteed outcome of any particular screed system.
Estimate or quotation route.
Straightforward domestic kitchen extension screeding may start with the instant estimate route for a non-binding indicative figure on traditional sand and cement work. Builder-led, drawing-led or specification-led kitchen extension projects may suit the commercial quotation route so photos, drawings, areas, depths, access details, UFH details and final floor finish information can be reviewed properly before a formal quotation is issued.
Get an instant estimate · Request a commercial quotation · Residential screeding · Extension and renovation screeding · Garage conversion screeding
Location relevance.
For location-specific quotation routes, you can also review London screeding enquiries and Buckinghamshire screeding enquiries. Site details, access, build-up depth, UFH and finish specification should be reviewed before works are confirmed.
Two routes for kitchen extension screeding enquiries.
Instant estimate.
Straightforward domestic kitchen extensions with a known area and depth may start with the instant estimate route for a non-binding indicative figure on traditional sand and cement work. The result is reviewed before a formal quotation.
Commercial quotation.
Builder-led, drawing-led or specification-led kitchen extension projects should send photos, drawings, build-up details, UFH information and intended floor finishes for review by the Screeding.com team.
Common questions.
What screed is best for a kitchen extension?
There is no single best screed for a kitchen extension. Sand and cement screed, liquid screed and fast-drying screed options are all considered. The right choice depends on the new extension slab, available build-up depth, any underfloor heating, the intended final floor finish such as tile, LVT, timber or stone, and the wider programme. The screed type should be confirmed against the project specification rather than picked from a generic rule.
Can screed be laid over underfloor heating in a kitchen extension?
Yes. Screed is commonly installed over underfloor heating in modern kitchen extensions where UFH is part of the design. Pipe cover, screed depth, curing period, UFH commissioning sequence and floor finish timing should be reviewed against the UFH specification and the screed manufacturer guidance, rather than treated as a default outcome.
How do floor levels affect kitchen extension screeding?
New extension slabs often sit at a different level to the existing house floor, so the new build-up usually has to bring the floor up to meet door thresholds and adjoining room finishes. Available build-up depth, insulation thickness by others, DPM arrangements by others, UFH pipework where used and the intended final floor finish all influence screed depth, and these should be agreed before screed type is confirmed.
How long does screed take to dry before kitchen fitting?
Walking on screed and fitting a kitchen are different milestones. Drying depends on screed type, depth, ventilation, humidity, temperature, any UFH commissioning programme and on-site conditions. Manufacturer guidance and the floor finish requirements should be referenced when planning kitchen fitting and final floor finish dates rather than assuming fixed day counts.
Do tiled, timber or LVT floors need moisture testing?
Timber, LVT, vinyl and other sensitive finishes may need moisture testing before installation, and some liquid screed systems may require laitance removal before adhesives or floor finishes. The relevant adhesive, floor finish and screed manufacturer guidance should be referenced before final floor finishes are programmed.
What information helps with a kitchen extension screeding estimate?
Helpful details include the kitchen extension floor area in square metres, available build-up depth, insulation and DPM arrangements where known, any underfloor heating information, the intended final floor finish, photos of the slab and extension, access notes and any drawings or specifications. The more context shared up front, the more useful the review and resulting estimate or quotation will be.
Should I use the instant estimate or commercial quotation form?
Straightforward domestic kitchen extensions with a known area and depth may start with the instant estimate route for a non-binding indicative figure on traditional sand and cement work. Builder-led, drawing-led or specification-led kitchen extension projects should use the commercial quotation route so photos, drawings, UFH information and floor finish specifications can be reviewed before a formal quotation is issued.
Tell us about the kitchen extension.
Share photos, drawings, areas, available build-up depth, any UFH details and the intended floor finishes. The Screeding.com team reviews kitchen extension screeding enquiries against site details, specification, access and programme before a formal quotation.