Hello,
we are about to purchase a single-family house and plan to renovate quite a bit. In addition to a new heating system, the radiators will be replaced with underfloor heating. However, I’ve been wondering how to best carry this out. The house has a living area of 170m² (1830 sq ft), and besides the partially installed tiles, the screed layer would also need to be removed. The latter would involve a huge amount of work and significantly increase the costs, so I am considering whether it’s possible to install the underfloor heating by milling channels directly into the existing screed without removing it. Are there any other options? Since the doors will also be replaced, a slight increase in floor height is not a major concern.
What else should I keep in mind? How would the heating efficiency behave if the installation is done differently than usual? Any advice would be greatly appreciated!
we are about to purchase a single-family house and plan to renovate quite a bit. In addition to a new heating system, the radiators will be replaced with underfloor heating. However, I’ve been wondering how to best carry this out. The house has a living area of 170m² (1830 sq ft), and besides the partially installed tiles, the screed layer would also need to be removed. The latter would involve a huge amount of work and significantly increase the costs, so I am considering whether it’s possible to install the underfloor heating by milling channels directly into the existing screed without removing it. Are there any other options? Since the doors will also be replaced, a slight increase in floor height is not a major concern.
What else should I keep in mind? How would the heating efficiency behave if the installation is done differently than usual? Any advice would be greatly appreciated!
Hello Witalja,
how are things with you now?!
I also have major projects coming up, such as the installation of underfloor heating and domestic hot water system.
There are two of us, and I got a 300L (79 gallons) hot water storage tank. It’s a bit oversized, but future-proof ;D
how are things with you now?!
I also have major projects coming up, such as the installation of underfloor heating and domestic hot water system.
There are two of us, and I got a 300L (79 gallons) hot water storage tank. It’s a bit oversized, but future-proof ;D
Basically, nothing new has happened so far. The second general contractor recommended the Brötje EcoCondens Compact BBK 22F (with a hot water storage tank of about 100 liters (26 gallons)). It might be future-proof, but from what I’ve read, it’s also inefficient. However, 100 liters (26 gallons) seems a bit too small to me. I haven’t had any in-depth discussions yet. Things should progress again in about three to four weeks.
I have now decided against the milling option for myself.
When will it start?
I have now decided against the milling option for myself.
When will it start?
So with 100 liters (26 gallons), it will be difficult to fill the bathtub, right? You might just manage to fill a 160-liter (42 gallons) tub if you’re lucky, since the temperature in the storage tank is higher than in the bathtub, but after that, all the hot water is gone. Or if multiple people want to shower one after another. On the other hand, the question is up to what maximum output the system can deliver. Around 18 kW would be enough for a tankless water heater for showering.
Okay.
If your heating system has the required capacity, I would recommend using a slightly larger hot water storage tank (more than 100 liters (approximately 26 gallons)). This will save you from future retrofitting, remodeling, and extra costs. This way, you are on the safe side.
My construction site will start in about 2 weeks.
I plan to install the underfloor heating directly on the existing floor as it is now. I will not remove the screed. So, the floor level will be raised by about 9 cm (3.5 inches).
Insulation goes underneath, then the underfloor heating, followed by the screed on top, and that’s it. (The structural integrity must be able to support this.)
Advantages: Saves time and physical work.
Disadvantage: New door frames and door openings will need to be raised by about 9 cm (3.5 inches).
If your heating system has the required capacity, I would recommend using a slightly larger hot water storage tank (more than 100 liters (approximately 26 gallons)). This will save you from future retrofitting, remodeling, and extra costs. This way, you are on the safe side.
My construction site will start in about 2 weeks.
I plan to install the underfloor heating directly on the existing floor as it is now. I will not remove the screed. So, the floor level will be raised by about 9 cm (3.5 inches).
Insulation goes underneath, then the underfloor heating, followed by the screed on top, and that’s it. (The structural integrity must be able to support this.)
Advantages: Saves time and physical work.
Disadvantage: New door frames and door openings will need to be raised by about 9 cm (3.5 inches).
I will definitely choose a larger storage tank. I think 160 liters (42 gallons) is a good size.
The Brötje Kompakt was designed for 22 kW.
So, similar to our setup.
I hadn’t even considered that option yet, even though I tend to prefer the less convenient one. At the beginning, we will also be under some time pressure because we plan to go on vacation a little more than three weeks after taking possession of the house (we had booked it before buying). During that period, I would like to have the screed installed. Whether that will actually work out is still uncertain.
Feel free to update here regularly about your progress and if any complications arise.
The Brötje Kompakt was designed for 22 kW.
So, similar to our setup.
I hadn’t even considered that option yet, even though I tend to prefer the less convenient one. At the beginning, we will also be under some time pressure because we plan to go on vacation a little more than three weeks after taking possession of the house (we had booked it before buying). During that period, I would like to have the screed installed. Whether that will actually work out is still uncertain.
Feel free to update here regularly about your progress and if any complications arise.
Haha, just like with me. I’m flying on vacation this weekend. I had actually booked the trip well in advance, before I had even bought the house.
Since July, I’ve been working on it. Everything went smoothly with the bank.
I spent three weeks straight focusing on consultations, cost planning, remodeling plans, and renovation planning, all with passion and enjoyment. Previous dreams and wishes (which I had always written down and kept) will soon be realized. For every area (plumbing, masonry, plastering, window installation, floor design) I gathered prices and information from 2-3 people. I have now put together my list of favorites. I trust my plumber completely, I’m giving him my key so he can install the hot water system while I’m on vacation.
Step 2: Two large walls will be removed and large sliding glass elements installed.
Step 3: Doorways will be moved and raised (because the floor will be raised by 9cm (3.5 inches)).
Step 4: Installation of underfloor heating.
Step 5: Screed and floor design.
Step 6: Electrical work.
Step 7: Plastering / tiling / wall cladding.
Step 8: Break.
Step 9: My wife will furnish the house.
Photos and updates will follow shortly....
Since July, I’ve been working on it. Everything went smoothly with the bank.
I spent three weeks straight focusing on consultations, cost planning, remodeling plans, and renovation planning, all with passion and enjoyment. Previous dreams and wishes (which I had always written down and kept) will soon be realized. For every area (plumbing, masonry, plastering, window installation, floor design) I gathered prices and information from 2-3 people. I have now put together my list of favorites. I trust my plumber completely, I’m giving him my key so he can install the hot water system while I’m on vacation.
Step 2: Two large walls will be removed and large sliding glass elements installed.
Step 3: Doorways will be moved and raised (because the floor will be raised by 9cm (3.5 inches)).
Step 4: Installation of underfloor heating.
Step 5: Screed and floor design.
Step 6: Electrical work.
Step 7: Plastering / tiling / wall cladding.
Step 8: Break.
Step 9: My wife will furnish the house.
Photos and updates will follow shortly....
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