Are gaps in underfloor heating normal?
Underfloor heating installations with visible gaps instead of a completely flush layout leave homeowners questioning the quality of the work. This uncertainty makes it difficult to know whether to accept the setup or be concerned about how it was installed.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Trusting the contractors to finish the job and letting the screed cover imperfections
- 2Posting photos of the installation on online forums to get opinions from HVAC professionals and experienced DIYers
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
r/hvacadvice1 person · September 2026
“What do you think of the install?”source ↗
Rebelranch35 · r/hvacadvice · 9 upvotes
Where this came up
People with this problem also raised
- 14How to tell if boiler and plumbing installation was done right
- 4How to tell if a carpet installation job was done badly
- 6How to tell if flooring installation is wrong
- 31How to tell if a new roof was installed correctly
- 5Are open cavity vent returns and exposed pipes normal in new construction?
- 11Will my DIY water heater installation pass inspection?