Underfloor Heating Screed · Dorset
Underfloor Heating Screed for Poundbury Builds
Underfloor heating only works as well as the screed encasing it — and in Poundbury 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 Poundbury 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 Poundbury jobs sit within 30 minutes of base, so site visits stay simple and pour days run to time. Poundbury sits Dorchester (1 mi), and we work the surrounding villages on the same week's diary.
Underfloor Heating Screed in Poundbury — 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 Poundbury 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.
Poundbury at a glance
County
Dorset
District
Dorset
Postcode
DT1
Nearest city
Dorchester (1 mi)
Nearest motorway
M5 (J25, ~46 mi)
Primary A-road
A35
Local industries
local retail, school and community builds
Common builds
1930s semis, estate new-builds
Typical Poundbury use cases
- 1930s semis — a regular brief in Poundbury
- Estate new-builds — a regular brief in Poundbury
- Kitchen-diner extensions — a regular brief in Poundbury
- Garden-room outbuildings — a regular brief in Poundbury
- Local retail — a regular brief in Poundbury
Floors poured around Poundbury
What to expect on pour day in Poundbury
- 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 Dorset workload
Within easy reach of Poundbury
Materials and systems we use in Poundbury
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 Poundbury 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.
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.
When can I switch the underfloor heating on in Poundbury?+
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 Poundbury clients to the schedule.
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.
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.
Do you fit the UFH pipes yourself?+
We work alongside your chosen UFH installer rather than fitting pipes ourselves — most Poundbury jobs come with a heating sub-contractor already lined up, and we coordinate dates with them.
Coverage across DT1
From Poundbury 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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