Hydronic underfloor heating
In-screed hydronic heating for Sydney and NSW projects, installed above the structural slab and beneath the finished floor.
Installed above the structural slab
Faster response than in-slab heating
Coordinated with screed and floor finishes
Quiet radiant comfort with hidden pipework
How it works
Hydronic in-screed heating circulates warm water through pipework installed on top of the structural slab and held in position before the screed is laid.
The water is heated by a central energy heat source, then distributed through designed loops below the finished floor. Because the pipework is closer to the floor surface than an in-slab system, it can provide a faster heating response while keeping the comfort quiet and concealed.
Floor construction
This layer sequence uses the Profi Duo system recorded in SmartHeat's South Bowenfels project. Your floor section needs its own confirmed insulation, screed and finish specifications.
The finish and any adhesive are selected for compatibility with the heating system. Their thickness is project-specific.
The pipework sits above the structural slab, within the screed. The pipe specification, screed depth and cover must be resolved for the project.
South Bowenfels used Profi Duo insulation and fixing boards below the pipework. The recorded 10mm component is only part of the floor assembly.
The heating layers are built above the structural slab. Slab levels and any additional preparation or insulation must be checked for your building.
Recorded NSW installations
These records confirm the heating components and fixing methods. A complete dimensioned floor build-up is needed to assess the available height in your project.
South Bowenfels · Central Tablelands, NSW
10mm Profi Duo boards
Pipework installed over insulation and fixing boards before screed and the final floor finish. The record confirms system design, board supply, pipe installation and manifold connection.
The record does not give pipe size, screed depth, cover or total finished floor height.
Bronte · Eastern Suburbs, NSW
10mm hydronic pipe
Pipework secured to fixing rails before screeding, coordinated around walls, columns, glazing and service penetrations. The record confirms design, pipe supply, installation and pressure testing.
The pipe size does not establish screed depth, insulation requirements or total finished floor height.
Planning an in-screed system in NSW? Share your suburb, floor levels, finish and construction stage so SmartHeat can assess suitability.
Discuss Your Project
Benefits
In-screed hydronic heating provides radiant floor comfort with a smaller heated mass and generally quicker response than in-slab heating.
Response
Because the pipework sits above the structural slab within the screed layer, the heating mass is typically smaller and can respond more quickly.
Application
In-screed systems are commonly considered for tiled areas, bathrooms, living zones and projects where the floor build-up can be coordinated early.
Comfort
Warm water circulates through pipework below the finished floor, creating an even heat profile without visible wall emitters.
Retrofit
Where the structural slab already exists, an in-screed approach can be assessed as part of a renovation or floor replacement scope.
Control
Zones can be designed around room use, floor finish, thermal load and the daily comfort pattern expected by occupants.
Heat source
Correctly designed systems can work with air-to-water heat pumps, boilers, solar-assisted systems or geothermal plant where suitable.
Design and installation
The heating design and the wider floor construction need one coordinated sequence. Confirm the floor layers and trade responsibilities in the quote before pipework is covered.
Share slab levels, available height, floor finish and room requirements so the heating system can be assessed.
Coordinate pipe layout, insulation, manifolds and zones. Agree who prepares the slab, installs boards and supplies and lays the screed.
Complete the agreed heating installation before screeding. Pressure testing is recorded in SmartHeat's Bronte project.
Where included in the agreed scope, connect the plant, fill and check circuits, configure controls and provide operating guidance.
Scope and coordination
SmartHeat's NSW delivery service covers heating design, supply, installation and commissioning as agreed for the project. The floor preparation, insulation and screed responsibilities also need to be named in the quote.
Suitable projects
FAQ
It is a hydronic underfloor heating system installed above the structural slab within a screed layer, rather than embedded inside the concrete slab itself.
In-slab heating is installed within the concrete slab and has more thermal mass. In-screed heating sits closer to the floor finish, so it can usually respond faster.
Yes, it can be considered for major renovations where the floor build-up, levels, screed depth and finished floor material can be planned properly.
Tile and stone are common options because they transfer heat well. Other floor finishes need to be checked for compatibility with the heating output and manufacturer limits.
No. The 10mm figures in the Bronte and South Bowenfels project records identify the pipe or board component only. Screed, cover above the pipework, insulation requirements, adhesive and the floor finish all need to be resolved before the total height can be confirmed.
Confirm floor preparation, insulation installation and screed supply and laying in your project quote. SmartHeat's Bronte and South Bowenfels installations demonstrate heating design, component supply and pipe installation, with testing or manifold connection recorded for the respective projects. Commissioning and handover are available through the agreed design, supply and installation service.
Guides
Check flooring approval, temperature limits, underlay, adhesives and installation records before choosing or replacing a finish over hydronic underfloor heating.
Build a practical winter routine with your SmartHeat thermostat, plan around floor response, and manage schedules, time away and comfort issues.
Compare in-slab and in-screed hydronic heating, including thermal mass, response time, floor build-up, insulation and which system suits different projects.
Projects
South Bowenfels, Central Tablelands, NSW
Hydronic Underfloor Heating - In-Screed
Bar Beach, Newcastle, NSW
Hydronic Underfloor Heating - In-Screed
Bronte, Eastern Suburbs, NSW
Hydronic Underfloor Heating - In-Screed
NSW project enquiry
For your NSW project, share the suburb, project stage, available floor height and selected floor finish. Attach drawings or a floor section if available so SmartHeat can assess the heating layout and agree the installation scope.
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Review SmartHeat's design, supply and installation service for complete project coordination.
Design, Supply & Installation