Want invisible heating that warms your entire floor? No radiators taking up wall space, no cold spots, just consistent comfortable warmth throughout your room. Underfloor heating transforms how your South London home feels – and it's more efficient than you might think.
HeatBox installs wet underfloor heating systems across South London – Bexley, Greenwich, Lewisham, Bromley, Croydon, and all surrounding areas, plus extended coverage to Central London and Wandsworth. We specialise in wet (hydronic) systems that connect to your boiler or heat pump. Over 15 years experience installing underfloor heating in extensions, renovations, and new builds throughout South London. From single-room installations to whole-house systems.
Considering underfloor heating for your South London property? Here's why homeowners make the switch
Radiators create hot and cold zones – warm near the radiator, cooler across the room. Underfloor heating warms the entire floor surface evenly, distributing heat consistently throughout the space. No more cold feet or temperature variations.
Radiators dictate furniture placement and limit design options. Underfloor heating is completely invisible – every wall becomes usable space. Perfect for South London properties where space is at a premium. Design your rooms without heating constraints.
Underfloor heating operates at lower water temperatures (35-45°C) compared to radiators (60-75°C). Lower temperatures mean less energy consumption – typically 15-25% more efficient than radiator systems. Even better savings when paired with heat pumps.
Planning an air source heat pump? Underfloor heating is the ideal partner. Heat pumps work most efficiently at low temperatures – exactly what underfloor systems use. Future-proof your heating for the renewable energy transition.
Radiators create convection currents that circulate dust around your home. Underfloor heating uses radiant warmth with minimal air movement, reducing dust circulation. Better for allergy sufferers and overall air quality.
Underfloor heating is a premium feature that adds genuine value. Buyers expect modern heating solutions, especially in renovated South London properties. It's an investment that pays back when you sell.
South London extensions and open-plan kitchen-diners suit underfloor heating perfectly. Large spaces that would need multiple radiators can be heated invisibly. Bi-fold doors to gardens work better without radiators blocking views.
We focus on South London rather than spreading thin across the entire capital. All our engineers are based locally – when you book an installation in Bexley or Greenwich, we're already in the area. We've installed underfloor systems in hundreds of South London properties.
We specialise in wet (hydronic) underfloor heating that connects to your central heating. Wet systems are more economical to run than electric and integrate with existing boilers or heat pumps. Electric mats suit small areas, but wet systems are better for whole rooms.
Underfloor heating needs proper design – pipe spacing, flow rates, zone configuration, manifold sizing. We don't guess – we calculate heat loss for each room and design accordingly. Proper design means proper performance and efficiency.
Connecting underfloor heating to your boiler requires Gas Safe registered engineers. All our team are fully qualified for boiler work, manifold installation, and system integration. Complete peace of mind.
Underfloor heating installations must comply with Building Regulations Part L. As Competent Persons Scheme members, we self-certify installations and handle all compliance documentation automatically.
We install systems from leading manufacturers with proper warranty registration. Using approved installers protects your warranty. We provide all documentation for your records.
Whether connecting to your current boiler or installing as part of a heat pump system, we design integrated solutions. We'll advise if your existing boiler can handle underfloor heating or if upgrades are needed.
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We install all types of wet underfloor heating systems to suit different South London properties
The traditional method – pipes laid on insulation boards and covered with screed (liquid or sand/cement). Best for new builds and major renovations where floor levels can accommodate 75-100mm buildup. Excellent thermal mass provides steady, consistent heat.
Designed for renovations where floor height is limited. Systems like LoPro and similar products add only 15-25mm to floor height. Ideal for South London Victorian and Edwardian houses where raising floors significantly isn't practical.
Aluminium spreader plates or grooved panels sit on existing floors with minimal height increase. Good retrofit option for specific rooms. Works well over existing concrete or timber floors.
For properties with timber joists, pipes run between joists using heat emission plates. Common approach for South London period properties with original suspended floors. No screed required.
Don't need whole-house underfloor heating? We install single-room systems for bathrooms, kitchens, extensions, or conservatories. Often more practical and cost-effective than full-house installations.
Complete underfloor heating throughout your property with individual room control. Manifold systems allow different temperatures in different zones. Program bedrooms cooler than living areas, or heat only occupied rooms.
Don't worry – our engineers can identify and repair any boiler. Call us for expert diagnosis and repair.
What actually happens when you call for emergency boiler repair—from first contact to 12-month guarantee.
We visit your South London property to assess requirements. We measure rooms, check floor construction, note insulation levels, and discuss your heating expectations. Heat loss calculations determine system specifications.
Based on the survey, we design your complete system – pipe layouts, spacing calculations, manifold sizing, zone configuration, and control options. You receive detailed drawings showing exactly what's proposed.
You receive a comprehensive written quote covering all materials, labour, and timescales. The price is fixed – no surprises during installation. We explain everything and answer questions before you commit.
Once you approve the quote, we schedule installation around your project timeline. For renovations, we coordinate with other trades. For extensions, we work with your builder's programme.
We prepare the floor area, install insulation boards to prevent downward heat loss, and lay edge insulation. Proper preparation is essential for system efficiency.
Pipes are laid according to design drawings – correct spacing and patterns for even heat distribution. Manifold is installed in accessible location. All connections are made and pressure tested.
Depending on system type, screed is poured (by screeding contractor) or floor finish is applied directly. We coordinate with other trades to ensure correct sequence.
Once floors are cured (if screeded), we commission the system, balance zones, set up controls, and verify correct operation. You receive full demonstration of controls and maintenance requirements.
Underfloor heating costs depend on system type, area size, and installation complexity:
Several factors influence underfloor heating installation pricing
New concrete floors suit standard screed systems – most economical option. Existing floors requiring retrofit solutions cost more due to additional materials and labour. Suspended timber floors need specific installation methods.
Standard screed systems cost less than low-profile retrofit options. Low-profile systems use more expensive materials to achieve minimal height buildup. We recommend based on your specific situation.
Good insulation beneath pipes is essential for efficiency. If existing insulation is inadequate, upgrades add cost but dramatically improve performance. We assess current insulation during the survey.
Tiles and stone work excellently with underfloor heating – high conductivity. Engineered wood and laminate work well with correct selection. Thick carpet reduces effectiveness and may not be suitable. We advise on flooring compatibility.
More zones mean more manifold outlets, thermostats, and actuators. Single-zone systems cost less than multi-zone setups. We balance cost against control flexibility based on your needs.
South London's diverse property types each suit different underfloor heating approaches
Period properties across Greenwich, Blackheath, Dulwich, and Forest Hill often have suspended timber floors. We install between-joist systems that work with original floor structures. Low-profile systems suit ground floor renovations where you're not lifting original floorboards. Conservation area considerations rarely affect internal heating installations.
Predominant across Bexley, Bromley, and Streatham. Solid ground floors suit standard screed systems when renovating. Upper timber floors can have between-joist installations. These properties work well with underfloor heating, especially in extended kitchen-diners.
Extensions are the most popular application for underfloor heating. New concrete floor slabs are ideal for screed systems. Bi-fold doors, open-plan layouts, and level thresholds all suit underfloor heating perfectly. We work with builders to ensure correct floor buildup.
South London flats suit underfloor heating where floor construction allows. Check lease restrictions before proceeding. Sound insulation requirements may affect system specification. Smaller areas often suit single-zone systems.
Building a new house or doing major structural work? Underfloor heating is most cost-effective when installed during construction. We work with architects and builders from early design stages to integrate heating properly.
Thames Water serves South London with high mineral content (250-320mg/l calcium carbonate) – significantly harder than many other UK areas.
We recommend system inhibitors to protect metal components. Magnetic filters on the heating system catch debris and scale particles. If your boiler already has hard water protection, this extends to the underfloor system. Annual servicing checks for scale buildup.
Heat pumps are particularly sensitive to water quality. If combining underfloor heating with a heat pump installation, water treatment is essential for system longevity and efficiency.
Legal requirements every engineer must follow and why they exist
Underfloor heating installations must comply with Building Regulations Part L (Conservation of Fuel and Power). This covers insulation beneath pipes, system controls, and overall efficiency. As Competent Persons Scheme members, we self-certify compliance.
Building Regulations specify minimum insulation values beneath underfloor heating. Typically 50-100mm PIR insulation depending on floor type. Proper insulation prevents heat loss downwards and improves efficiency dramatically.
Underfloor heating systems must comply with Water Regulations for sealed systems. Expansion vessels, pressure relief, and fill loops must be correctly specified. We design compliant systems meeting all requirements.
Thermostats and actuators require electrical connections. Our installations comply with Part P electrical regulations. Zone controls and programmers are wired safely and correctly.
All our engineers are Gas Safe registered with £5M public liability insurance. We comply with all Building Regulations, provide landlord certificates, and maintain complete legal compliance for every job across London.
HeatBox provides underfloor heating installation with specialist focus on South and South East London
South & South East London Specialists
Not all heating problems are equal—here's how to determine if you need emergency callout
Not sure if you have an emergency? Call us and we'll help you assess urgency and prioritise accordingly across our London coverage areas.
What to expect when we repair your boiler
Clear the installation area completely – furniture, floor coverings, and stored items. If we're working in an occupied home, we'll advise which rooms to clear and when. Coordinate with any other trades involved in your project.
Installation typically takes 2-5 days depending on area size and system type. Pipe laying takes 1-2 days for typical projects. If screed is needed, allow curing time before walking on floors (typically 3-7 days) and before floor finishes (typically 21-28 days).
Once commissioned, use the system gently at first – gradually increase temperature over several days. Don't rush heating up, especially with new screed. We provide specific commissioning instructions for your system type.
Annual servicing checks pump operation, pressure, and controls. Manifold actuators may need occasional attention. Well-installed systems require minimal maintenance. We offer service plans for complete peace of mind.
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Need a new boiler to power your underfloor heating? We install compatible system boilers with warranties up to 12 years.
Complete heating systems combining underfloor heating downstairs with radiators upstairs.
Annual servicing keeps your boiler running efficiently alongside underfloor heating. From £90.
System boilers for underfloor heating pair perfectly with unvented cylinders for mains pressure hot water.
Adding underfloor heating to an existing system? Powerflush first ensures clean water circulates through new pipes.
Over 15 years serving London with transparent pricing, specialist knowledge, and genuine emergency response. No corporate markup, just honest local service.
Most modern boilers work with underfloor heating. We install mixing valves to reduce water temperature for underfloor zones while maintaining higher temperatures for any radiators. We assess your boiler during the survey.
Your choice. Single rooms (bathrooms, kitchens, extensions) are popular starting points. Whole ground floors suit open-plan living. We design systems for your specific requirements and budget.
Ready for invisible, efficient heating? Book your free survey and get a fixed price quote for underfloor heating installation.
Serving Bexley, Greenwich, Lewisham, Bromley, Croydon & All South London
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