Guide to Retrofit Underfloor Heating Systems | ADVICE | Homebuilding
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- Опубликовано: 30 июн 2024
- SPONSORED | Guide to Retrofit Underfloor Heating Systems
Homebuilding & Renovating, in association with JK Floorheating Ltd, have created a guide to retrofit underfloor heating systems.
This video looks at the types of underfloor systems available, which one is right for your project, benefits of underfloor heating, costs, installation and what else you might need to consider. 
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As I work for this company the main concern and question is always heat loss in an insulated slab. Yes, with no insulation in the floor you will get a heat transfer percentage loss but it's nowhere near as drastic or high as many people think and state. We've paired this system with GSHP's in properties with no floor insulation. We take into account heat loss calculations, running temp, floor coverings.
If our system can't meet the requirements, we don't install it. Simple. We don't want the customer to experience a problem once it's installed.
Insulation is of course always preferred, but if a house is pre 1995 chances are you have no insulation present. This system can and is installed as the primary heat source even with no insulation present in floors.
If heat loss is a concern then updating insulation in other areas of the house should always be the focus. Windows, walls, loft insulation improvements will be far more beneficial to improve heat loss and more financially affordable than excavating an entire slab.
For us, we are an option for retro-fit that solves a problem of not having to raise your floor heights. We won't be everyone's cup of tea nor do we aim to be. Thankfully we know that our system works with great results. If it didn't work we wouldn't install it and wouldn't be a company of some 26 years strong that we are today.
There are some great products out on the market in terms of overlay systems that we don't offer at JK. So long as an UFH system is installed by someone that knows what they are doing and installs it correctly then it's a great way to heat a property.
So happy I came across this comment. I have the same problem on a job we’re on at the moment kitchen/dining extension the kitchen foot print being the new slab, insulated and the dining area the existing with no installation. I’m really governed with height and can’t raise the existing (dining) area floor. Any suggestions? Thank you
@@timgranthunnisett380 sorry. Only just come back to this video.
Did you find your solution?
Dear Expert,
Thank you for the brilliant explanation. My question is whether we can install new laminate on top of old ceramics while using a wet floor heating system. Could you please guide me on whether this would prevent efficient heating conductivity, increase energy consumption, and how it might affect moisture levels? Additionally, what steps can I take to control these factors?
Best regards,
A bungalow I'm buying has a majority concrete floor with 2 other rooms having a wooden floor. The bathroom has a concrete floor and I'd want to convert it into a wet room. The EPC recommends floor insulation. What solution for underfloor heating throughout the house would you recommend and why? Many Thanks
I have a 6-inch slab floor and it has 150mm insulation under it as well as the sides, so it's isolated from the outside, how long would it take for this system to warm up the slab, and how long would it keep the room warm for after the heating is turned off .
This may well be a stupid question, but couldn't the groove cuts in the floor be a little deeper & wider, to accommodate a hammock shaped insulation, inhibiting the heat in three directions, leaving 'up' as the heat path of least resistance.
Kind regards
Robert
Hi Charlie,
The amount of insulation you would get really would not have any benefit.
I'm a employee of JK and something I'm asked a lot, but simply a small amount of insulation of 5 - 10mm isn't really offering anything in terms of efficiency to value for the extra costs / materials it would take to do this.
The pipework is directly below the floor finish as we install currently so the heat transfer has limited restriction to then transfer through to the floor as we only recommend covering with 10mm self-levelling prior to final floor finish.
We have a testimonial on our JK RUclips page from a customer who is over 12 months in with our system and a GSHP. His property was 60's build so no floor insulation, so feel free to check that out.
The customer is delighted with the results and so were we.
In a basement application, what happens if the basement floods or has an unexpected water event (broken water heater etc)? Is the system waterproof? Will it be damaged / require removal? Will it trap water and potentially get moldy?
Hi Jeff, as the system sits beneath a screed - essentially it's encased in concrete - there should be no problem with flooding or waterproofing.
If crossing a zone should that pipe be insulated to stop heating that room as well? We had system installed in Spain and when heat a bathroom on separate zone the room before it heats up hotter than the bathroom! how get around this insulate that zone till reaches it?
Sounds toasty! The systems we've seen, such as the system in this video, have a separate pipe / feed for each room / zone. So the bathroom will have it's own flow and return, the living room will have it's own flow and return etc. It's also pretty unusual for underfloor heating to make a house "hot" as it operates on a low, consistent, ambient temperature rather than like a radiator which is either "really hot" or "off". The smart thermostats that control these systems are also really good these days.
at 5:30, can that be done to a home in the US? are you guys there? i wanted to add UFH to my garage floor but its already poured.
Looking for a company that does this in the USA. What is that milling machine called?
JK floorheating is setting up in the USA. First installation has just been installed in Detroit.
Can you put carpeting over this retrofit UFH, or does it have to be wooden flooring like engineered boards or laminated boards.
You can technically put carpet over underfloor Heating, but it doesn't conduct heat particularly well, so it would be counter productive. However, a lot may depend on the thickness, material and underlay involved, so it's best to speak to a UFH expert to find out more.
Where do I get more info on the system that you come and cut the groves into the floor that is Existing?
That's a system provided by JK Underfloor Heating > www.jk-gb.com/
But if there’s no insulation under the concrete of a retrofit, won’t the concrete just act as a heat sink with the ground so lots of your heat is getting sucked up by the ground?
No as concrete has a high thermal mass this allows it to absorb heat then radiate it back out as the air around it cools concretes thermal mass is the same as stone ever been on holiday and tried to walk to the pool? the tiles are hotter than the air around them same sort of thing the heat is radiated back into the air! As for heat loss is rather lose it equally back into room than out of walls and windows with radiaters!
storage heaters work on the sane principal they are filled with concrete slabs.
I think unless you as sure you have insulation under the concrete screed ? Q which is heat loss will be very large, so system won't be efficient, the other systems you mentioned have build in insulation ?
No not true it all depends on thermal mass google thermal heating! Storage heaters have been using this concept for years storing the heat at cheap rates and radiating it back out! Heat loss with radiaters is more of a problem.
Storage heaters won’t have the same problem as they are in the room, no heat loss to the outside. The non-insulated underfloor heating is like putting using the storage heater as a wall, half the heat goes to outside as air in the room has low heat mass.
Pipes are close to the surface, and thermal transfer through concrete is low so heat loss to the homes exterior will be minimal.