UFH installation detailing
Screeding Around an Underfloor Heating Manifold
A manifold sits at a fixed height with cabling and pipework converging on it — get the screed level or the protection wrong here and it's the hardest spot on the job to put right afterwards.
Coordinate your manifold detail with us
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Every UFH loop on a project runs back to a manifold, and that manifold usually sits recessed into a wall or stud cavity at a height set before the screed goes down. Because the manifold cabinet, pipework stubs and often electrical actuators all converge in one small area, it's the single trickiest detail to get right during a pour — and one of the most common places we're called back to after another contractor's screed job.
Problems here range from cosmetic — screed splashed up into the cabinet — to structural, where the finished floor level doesn't match the manifold's fixed connection height, leaving pipework under strain.
This page covers how the area should be protected and set out before pouring, and what we do differently to avoid the common mistakes.
How we protect and level around a manifold
- 1
Confirm manifold height first
We check the fixed manifold height against the design finish floor level before scheduling the pour.
- 2
Mask and seal the cabinet
The manifold cabinet and any electrical actuators are fully sheeted and taped before screed arrives.
- 3
Set a local datum
An extra datum pin is placed close to the manifold to guarantee the level matches exactly at the connection point.
- 4
Pour and check immediately
The area is checked with a straight edge as soon as the pour reaches it, while it's still workable.
- 5
Unmask and inspect
Protection is removed once the screed has set enough to walk on, confirming no splash contamination.
Common problems on other people's jobs
- Manifold cabinet left unprotected, screed splashed into valves and actuators
- Finish level set without checking the manifold's fixed connection height
- Pipe stubs left uncapped, allowing screed slurry to enter the pipework
- No local datum near the manifold, leaving a dip or high spot at the cabinet
What to check before a manifold-area pour
| Check | Why it matters |
|---|---|
| Manifold cabinet height confirmed against FFL | Prevents pipework strain once floor is finished |
| All pipe ends capped | Stops screed slurry entering the manifold or loops |
| Cabinet and actuators fully sheeted | Avoids splash contamination during the pour |
| Local datum pin placed | Guarantees exact level at the connection point |
Coordinate your manifold detail with us
Send us the manifold layout and fixed height and we'll plan the pour and protection around it properly.
A manifold is the one place on site where the floor level and a fixed mechanical connection have to agree exactly. Get it wrong and you're either cutting pipework or packing out the cabinet.
— Exeter Liquid Screeders
Screed Over UFH Manifold — questions we get asked
Keep reading across the site
Coordinate your manifold detail with us
Send us the manifold layout and fixed height and we'll plan the pour and protection around it properly.