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Underfloor Heating FAQs

Thinking about installing underfloor heating or simply curious about how it works? Whether you’re planning a new extension or upgrading your existing heating system, underfloor heating is becoming a popular choice across homes in Greenwich, Welling, Blackheath, and Charlton. To help you understand if it’s right for your home, here are answers to the most frequently asked questions we hear from local homeowners.

Frequently Asked Questions 

Most modern boilers, including combi and system types, are compatible with underfloor heating. However, your boiler must be powerful enough to support the system. A heating engineer can confirm this during a survey.
Yes, underfloor heating can be retrofitted, although it’s easier during a renovation. Electric systems are thinner and suitable for most floors, while water systems may require more preparation and screeding work.
Generally, yes. Underfloor heating runs at lower temperatures and distributes heat more evenly. When paired with good insulation, it can be more energy-efficient and reduce heating bills over time.
Electric systems can begin warming the floor within 20 to 40 minutes. Water-based systems take longer but hold heat better once the desired temperature is reached, making them more efficient over time.
Hard surfaces like tile, stone, and engineered wood are ideal. Low-tog carpets and compatible underlays can also be used, but always confirm compatibility with your flooring supplier before installation.
Yes, most underfloor heating systems can be controlled using smart thermostats like Nest, Hive, or Tado. These allow you to create heating schedules and control zones for improved comfort and efficiency.
Running costs depend on the type of system and your home's insulation. Wet systems are cheaper to run long-term. Electric systems are quicker to install but may cost more to run depending on your electricity rates.

Thinking About Underfloor Heating in Greenwich, Welling, Blackheath or Charlton?

McGrath Heating Services can help you plan, install, or upgrade your underfloor heating system to work seamlessly with your existing boiler. From new builds to retrofits, we offer expert advice and a clean, efficient install. Call us today or fill out our contact form to arrange a consultation in Greenwich, Welling, Blackheath or Charlton.