4 min read
For those Cardiff homeowners who’re planning to upgrade their home’s heating setup without overspending, retrofitting underfloor heating (UFH) is a cost-efficient solution that strongly warrants consideration.
Whether it’s for a semi-detached in Penylan, a classic terrace in Canton, or a new build in Lisvane that’s yet to experience the benefits of radiant heating, UFH can be a smart investment, and our guide below can help point potential buyers in the right direction.
1) UFH Retrofitting in Cardiff
Cardiff boasts a diverse range of housing styles, from Victorian terraces to modern townhouses and more. Surprisingly, many of these homes are well-suited to retrofitting UFH, especially when they’re paired with systems that build upon their pre-existing structure and layout.
For example, modern homes with solid concrete floors are highly compatible with standard UFH systems, as any embedded pipework can utilise the concrete’s heat mass qualities, effectively turning the entire lower surface area of a given room into a supercharged heat emitter.
On the other hand, older properties are generally more compatible with a UFH offshoot known as ‘overfloor heating’, or ‘OFH’. In many cases, OFH systems provide a greater thermal break than UFH alternatives, and can even prevent downward heat loss in older homes, which are often insulated to an inherently poor standard.
“Over the years, I’ve found that many properties in Cardiff have strong potential for floor-based heating”, says Joshua Kelly, lead engineer at Floorheat. “It’s all about evaluating the heat source, the floor structure and then finding the right system”.
2) UFH Systems
When retrofitting UFH, potential buyers should consider selecting a system that is not only compatible with their property, but also their ability to tolerate disruption during the installation process. Not all floor-based heating systems are born equal in this regard, and below we’ll briefly explain why.
Wet UFH Systems
Wet UFH systems use networks of 16mm ‘Pert-Al-Pert’ pipes arranged in loops beneath the floor, which in turn heat the core mass. These systems circulate warmed water from the heat source through flow-and-return pipes to a manifold. A pump, often contained within or located near the manifold, then distributes the heated water evenly throughout each pipework zone.
Most properties in Cardiff can be adapted to wet UFH systems, provided they have a heat pump, gas/electric combi boiler or unvented system. Homes in Cyncoed, Llandaff and Pontcanna can benefit greatly from wet UFH systems, as houses in these areas have older floors that are prone to heat loss, a shortfall water-based systems can help to address.
Low-Profile UFH Systems
On the other hand, low-profile UFH systems are fitted with 18mm insulation that acts as the base for embedded pipework. A 12mm layer of Leytex is then evenly applied over the existing Leytex, forming a new heat mass that allows for a thermal break from the subfloor. Tiles or LVT floor finishes can subsequently be laid over the Leytex.
One of the main advantages of using low-profile UFH is that these systems do not require any excavation, saving buyers a fair amount of money in labour costs, whilst minimising household disruption. “In some rooms, you might be up against a floor depth that’s in the shallow range”, says Joshua Kelly, a floor-heating engineer based in Cardiff. “That’s where low-profile underfloor heating excels”.
3) Key Installation Considerations
Before retrofitting UFH/OFH systems, would-be renovators may find value in taking the following factors into consideration:
Floor Finish Matters
For most systems, engineered wood, tiles or LVT are ideal floor finishes due to their optimal density and high thermal conductivity. However, other types of finishes are more ideal when user comfort is prioritised over the system’s warm-up time. Prime examples include UFH-approved laminate, and carpet.
Room Usage
Homeowners should focus on areas that are used the most, like lounges, kitchens, or bathrooms; those are the spots where having a warm floor feels the best.
Pro Tip: If your home is already undergoing renovations, that might actually be the best time to install UFH, especially before laying down any new flooring.
Insulation Is Key
As highlighted by Climate Action Wales, insulating floors and pipes can significantly reduce heat loss and boost overall energy performance. Granting households further energy-saving opportunities amidst the nation’s ongoing cost of living crisis.
4) Cost & Long-Term Value
Homeowners should note that true, accurate costing only becomes possible when a detailed home assessment is carried out. However, in terms of general cost-influencing factors, UFH retrofitting projects are mostly determined by the total surface area being covered, and as previously mentioned, the type of heat source being used.
While there is an initial outlay, many homeowners find that the increased resale value and energy savings make UFH retrofits worthwhile. Data from Compare The Market shows that UFH systems can be up to 25% more energy efficient than traditional radiators.
“Retrofitting underfloor heating isn’t just about comfort, it’s also a smart financial move”, concludes Joshua Kelly, a heating specialist based in Cardiff. “Some clients view energy-efficient heating systems as a great way to add value to their homes”.
Final Thoughts
Installing UFH in Cardiff homes isn’t just a luxury; it’s a smart upgrade that fits perfectly with today’s eco-conscious living standards. Whether you live in a period terrace in Pontcanna or a modern property elsewhere in the city, there’s a UFH solution that can work for almost any home. With the right timing, usage, and setup, homeowners can enjoy greater comfort, energy savings and even potential increases in property resale value.
Looking for a locally trusted underfloor heating installer who specialises in retrofits?
Get in touch with the specialists @ floorheat
T: 029 20 025 779 | E: info@floorheat.co.uk
AUTHOR BIO
This article was written by Jon Sainsbury, one of Cardiff's leading experts in home building and improvement services. With the support of his team, Jon is determined to reinforce customer centric practices across the South Wales home services industry.
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