14 Rivera Drive, Southend-on-Sea SS1 2RBinfo@avanzaheatingandcooling.co.uk Open 24/7Company No. 17201187 About Heating & Cooling Bathrooms Areas Contact 01702 967120Request Quote - Home - Services - Underfloor Heating Underfloor Heating · Essex # Underfloor HeatingDesign & InstallationWet & Electric. Essex Wide. End-to-end underfloor heating: heat-loss design, manifold supply, pipework, screed liaison, wiring, commissioning and balancing. Wet systems for new-builds and extensions, electric mat systems for bathroom and en-suite retrofits. Request Free Quote 01702 967120 15+ years on the tools · Gas Safe registered · Open 24/7 · Same-Day Service Open 24/7 · Same-Day Service Gas Safe Registered Free Quote · Price Fixed 14 Days Fully Insured 1-Year Workmanship Guarantee Service Overview ## Underfloor Heating — What, Who, When & Why. Owner-led by Pierre Codarin from Southend-on-Sea. Single point of contact from first call to final invoice. What it is Underfloor heating uses low-temperature water (wet systems) or electric mats to deliver radiant heat across the whole floor area. We handle full design — heat-loss calcs, pipe spacing, manifold sizing, zoning — through supply, install, commissioning and balancing. Who it's for Anyone building an extension, fitting a luxury bathroom, or doing a new-build. Wet systems work best on ground-floor extensions and new-builds with a heated screed. Electric mats suit upper-floor retrofits and single rooms. When you need it Best installed during a screed pour (wet) or under new tiles (electric). Retrofitting into an existing floor without lifting it is possible with overlay systems, but cost-effectiveness drops sharply versus during a renovation. Why hire a professional Underfloor heating runs at lower flow temperatures (35–45°C vs 70°C+ for radiators), which makes it perfect for modern condensing boilers and essential for air-source heat pumps. It frees up wall space, distributes heat evenly, and lasts 50+ years when installed correctly. The Real Cost Of Getting This Wrong ## What Happens If You Ignore It, Delay It, Or Hire The Wrong Person. Underfloor heating that's badly designed or badly installed is an expensive problem buried under a floor you can't easily lift. ### If It's Ignored — The Damage Cascade - Under-spec pipework or wrong pipe spacing leaves cold patches across the floor — the system runs constantly trying to compensate. - Uninsulated screeds lose 30%+ of their heat downwards into the substrate — gas bills double versus a properly-insulated install. - Wrong manifold sizing means the boiler short-cycles, halving the boiler's lifespan. - Electric mats fitted under cracked tiles fail at the cable joints — replacing them means lifting the whole floor. ### Common Mistakes We're Asked To Fix - Letting the screeder lay the pipework without proper pressure-testing first. - Skipping insulation board under the heated screed to shave a small saving off a much larger install. - Mixing electric and wet zones on the same thermostat. - Forgetting to leave a continuous run of pipe between manifold and floor (joins under a screed are a leak waiting to happen). Our Process ## A System That Gets Built To Specification — Not To A Mood. - 01 ### Heat-Loss Design Room-by-room heat-loss calc, pipe spacing and manifold sizing. We design first, then quote — no off-the-shelf sizing. - 02 ### Fixed Written Quote Itemised quote within 48 hours covering manifold, pipework, controls, commissioning. Lock-in price. - 03 ### Install & Pressure Test Insulation laid, pipework clipped to spec, manifold mounted and connected, full pressure test before any screed or tile work. - 04 ### Screed / Tile Coordination We work alongside your screeder or tiler to protect the system during pour or fix. Test held under pressure throughout. - 05 ### Commission & Balance System filled, vented, balanced room-by-room, thermostats commissioned, controls demonstrated. Warranty paperwork handed over. Benefits ## Concrete, Specific, Measurable. No Vague Promises. ### Radiant Heat, Even Distribution No hot spots or cold corners — the whole floor warms evenly. ### No Wall-Mounted Radiators Frees up wall space for furniture, vanity units and joinery — no aesthetic compromise. ### Heat Pump Compatible Low flow temperatures are perfect for air-source heat pumps — future-proofed against gas phase-out. ### Lower Running Cost on Modern Systems Radiant heat warms occupants efficiently — set-point temperatures can sit 1–2°C lower than with radiators. ### 50-Year System Life PEX-AL-PEX pipework in a screed has a design life of 50+ years when properly installed. ### Zoned Control Every room independently controlled. Heat only what you use. Inside The Detail ## The Materials, Methods & Variations That Decide The Outcome. These are the details cheaper installers skip — and the reason their work fails inside two years. Working across Southend-on-Sea · Chelmsford · Basildon · Colchester · Brentwood · Rayleigh · Wickford · Billericay · Harlow Full Service Area List ### Wet Underfloor Heating Systems Wet UFH circulates warm water through PEX-AL-PEX or PE-RT pipe clipped to insulation board, then covered with a heated screed (liquid anhydrite or traditional sand/cement). Pipe is run at 150mm or 200mm centres depending on heat loss. Each room (or zone) returns to a manifold with its own actuator and thermostat. Best suited to new-builds, extensions and full-floor refurbs where the screed can be poured fresh. ### Electric Underfloor Heating Electric mat systems (150W/m² or 200W/m²) sit between tile adhesive and the floor, controlled by a dedicated thermostat and floor sensor. Ideal for bathrooms and en-suites where lifting a whole floor for wet pipework isn't viable. Lower install cost, but higher running cost per kWh — best as a comfort upgrade in single rooms, not as primary heating for a whole house. ### Manifolds, Pumps & Controls We specify branded manifolds (Polypipe, JG Speedfit, Uponor) with built-in flow meters per loop — essential for balancing. A dedicated UFH pump-mixing unit blends boiler flow down to UFH operating temperature (typically 40–45°C). Wired or wireless thermostats per zone, with smart options (Nest, Heatmiser, Honeywell evohome) commissioned at install. ### Retrofit & Overlay Systems Where lifting a floor isn't an option, overlay UFH systems (Continal Lo-Pro, Wunda) add 18–25mm to floor height and sit above existing joists or screed. They run hotter than buried systems (45–50°C) and suit ground-floor extension retrofits — but always check finished floor heights against doors and skirtings before committing. Questions ## StraightAnswers. Cost, timeline, guarantees, lifespan, emergency cover — answered without the sales speak. Ask Yours ### How much does underfloor heating cost in Essex? +Underfloor heating is always priced from a free on-site survey or your floor plans — we don't quote per m² in the abstract because pipe spacing, manifold sizing, insulation and zoning all change the number. You'll receive a fixed written quote, with the price locked in for 14 days. ### Can you fit underfloor heating in an existing house? +Yes — either by lifting the floor and laying buried wet pipework, fitting an overlay system on top of the existing floor, or installing electric mats under new tiles in single rooms. We'll survey and tell you the most cost-effective route. ### Will underfloor heating work with my current boiler? +Almost any modern condensing boiler will run UFH — we add a mixing manifold to drop the flow temperature. Older non-condensing boilers can struggle and may need replacing alongside the UFH install. ### Is underfloor heating cheaper to run than radiators? +Often slightly cheaper on a like-for-like basis — radiant heat warms occupants at a lower air temperature. Pair it with a modern condensing boiler or heat pump and the saving grows. Pair it with an old boiler and weak insulation and the saving disappears. ### How long does the install take? +Pipework install for a 4-zone wet system on a 60–80m² extension is typically 2–3 days, plus screed cure time. Electric mat installs are typically 1 day per room before tiling. ### Will I lose floor height? +Buried wet systems add nothing to finished floor level (they sit inside the screed). Overlay wet systems add 18–25mm. Electric mats add 3–5mm under tile adhesive. ### Do you cover my postcode in Essex? +Yes — we work across Southend-on-Sea, Chelmsford, Basildon, Colchester, Brentwood, Rayleigh, Wickford, Billericay and Harlow. If you're outside that ring, call 07809 414913 and we'll confirm coverage before you spend a minute filling in a form. ### Are you Gas Safe registered and fully insured? +Yes. Gas Safe registered for all gas work, fully insured, and trading as Avanza Heating & Bathrooms Ltd (Companies House 17201187). Gas Safe is our only listed accreditation. Certificates and policy numbers available on request before any work starts. Related Services ## Often Booked Alongside Underfloor Heating. ### Boiler Installation & Servicing Gas Safe boiler installs, swaps, repairs and annual servicing. View Service ### Luxury Bathrooms Bespoke bathroom design, fit and finish — start to silicone. View Service ### Heating & Plumbing Full heating systems, radiator upgrades and general plumbing — our core trade across Essex. View Service Back to HomepageAll ServicesAll Service AreasContact Next Step ## Design A System That Disappears Into The Floor — And Stays There For 50 Years. Heat-loss design, fixed written quote within 48 hours, commissioned and balanced by hand. Request Free Quote 01702 967120 Gas Safe registered · Fully insured · 1-year workmanship guarantee · Companies House 17201187 · Southend-on-Sea Premium bathrooms, heating and plumbing across Essex. Owner-led, Gas Safe registered, same-day service guaranteed. 01702 967120info@avanzaheatingandcooling.co.uk14 Rivera Drive, Southend-on-Sea, SS1 2RB Explore - About - Heating & Cooling - Bathrooms - Areas - Contact Services - Heating & Plumbing - Boiler Installation & Servicing - Emergency Plumbing - Underfloor Heating - Landlord Gas Safety Certificates - Luxury Bathrooms Service Areas - Southend-on-Sea - Chelmsford - Basildon - Colchester - Brentwood - Rayleigh - Wickford - Billericay - Harlow © 2026 Avanza Heating & Bathrooms Ltd. Company No. 17201187. All rights reserved. Privacy PolicyTerms & ConditionsOpen 24/7 · Emergency call-outs · Call by 12pm, engineer with you by 4pm Call NowRequest Quote