Underfloor Heating Screed · Devon
Underfloor Heating Screed for Payhembury Builds
Underfloor heating only works as well as the screed encasing it — and in Payhembury that means a high-thermal-conductivity liquid pour that wraps every pipe with no voids.
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Underfloor heating only works as well as the screed encasing it — and in Payhembury that means a high-thermal-conductivity liquid pour that wraps every pipe with no voids.
The screed self-levels around every loop, eliminating the voids you get under hand-laid traditional screed. That means the floor responds faster when the heating calls for it, and stores less wasted heat.
Most of our Payhembury jobs sit within 30 minutes of base, so site visits stay simple and pour days run to time. Payhembury sits Honiton (5 mi), and we work the surrounding villages on the same week's diary.
Underfloor Heating Screed in Payhembury — how it works
Liquid UFH screed lets you run a thinner build-up than traditional bays — useful when ceiling heights or threshold levels are tight in Payhembury renovations.
We pour Cemfloor Therm liquid screed over your UFH pipes at 50mm above pipe (typically 65-75mm total over insulation), giving full pipe encapsulation, fast thermal response and a finished surface flat to SR1.
Payhembury at a glance
County
Devon
District
East Devon
Postcode
EX14
Nearest city
Honiton (5 mi)
Nearest motorway
M5 (J28, ~9 mi)
Primary A-road
minor B-roads
Local industries
agriculture, conservation residential
Common builds
listed cob-and-thatch cottages, barn conversions
Typical Payhembury use cases
- Listed cob-and-thatch cottages — a regular brief in Payhembury
- Barn conversions — a regular brief in Payhembury
- Farm outbuildings — a regular brief in Payhembury
- Agriculture — a regular brief in Payhembury
- Conservation residential — a regular brief in Payhembury
Floors poured around Payhembury
Step-by-step for a Payhembury job
- 1
UFH installer fits manifold, pipes and pressure-tests to 6 bar
- 2
We confirm edge insulation, DPM and pipe coverage depth
- 3
Pump and level the screed with pipes still under pressure
- 4
Slow commissioning of the heating — usually after 7 days, ramping per manufacturer spec
- 5
Floor coverings once moisture is signed off and commissioning is complete
Proof from the Devon workload
Within easy reach of Payhembury
Cemfloor systems for Payhembury
Cemfloor Therm
Liquid screed engineered for UFH — lambda 2.1 W/mK, fast response.
PIR/Phenolic insulation board
70-150mm typical depending on build regs U-value target.
Edge insulation strip
Critical around UFH zones to allow thermal expansion.
Pressure-testing kit
Pipes held at 6 bar through the pour to flag any damage immediately.
Common Payhembury build questions
Does liquid UFH screed improve EPC ratings?+
Indirectly — yes. Faster response and lower running temperatures help heat-pump COP, which feeds into your SAP/EPC. We'll share the manufacturer data your assessor needs.
What if a pipe leaks during the pour?+
Pipes are held at 6 bar through the pour. Any pressure drop is flagged immediately and we stop, fix and continue — this is exactly why we keep the manifold under test.
What depth of screed over UFH pipes do you recommend?+
Minimum 50mm cover above the highest pipe — usually a 65-75mm total slab over insulation. Thicker if you want more thermal mass.
When can I switch the underfloor heating on in Payhembury?+
On Cemfloor Therm we typically start a slow commissioning cycle from day 7, ramping 5°C per day per manufacturer spec. Forcing it earlier risks cracking, so we hold Payhembury clients to the schedule.
Will the screed crack as the UFH heats up?+
Properly isolated at the edges and at doorway joints, no. We pour with the pipes pressure-tested and follow a controlled commissioning schedule.
Can you screed over wet UFH and electric UFH?+
Yes — Cemfloor Therm encapsulates both. Electric mat systems usually take a thinner cover; wet pipes need the 50mm minimum.
Coverage across EX14
From Payhembury to the surrounding villages, we keep the radius tight so logistics stay simple.
Ready to get a price?
Tell us the rough size and location — we'll come back with a fixed quote today.
Or call our landline on 01392 237700
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