Allgreave Chapel: underfloor heating for a Peak District chapel conversion

About Allgreave Chapel

Allgreave Methodist Chapel was built in 1871 and sits on a bend of the A54 at Allgreave, near Wincle, on the Cheshire side of the Peak District. It closed as a place of worship in 2002. Chelsea and Mark bought it at auction in 2025 and are converting it into a tranquil, dog friendly holiday let, with a sympathetic finish and natural materials such as stone windowsills.

Follow the build, and see the finished chapel, at @allgreavechapel on Instagram.

In the news

• Macclesfield Nub News: Meet the couple breathing new life into historic Peak District chapel
• Brit Brief: Couple who bought chapel on a whim turn it into Peak District holiday home

The system

The full kit we supplied for the chapel floor:

• Floor system: 50 x MaxHeatUFH Castellated Floor Panels 1220 x 820 x 20mm (MaxHeatCrate-20), ready for screed
• Pipe: 3 x 100m coils of 16mm PERT-AL-PERT multilayer pipe
• Pipe support: 6 x Pipe Support Bends, a clean 90° turn for each pipe tail up to the manifold
• Perimeter: 1 x 50m Edge Insulation Foam Roll around every wall
• Manifold: 1 x 3 port Dualmix Stainless Steel Manifold Assembly, with pressure gauge and air vent
• Manifold connections: 6 x 16mm Eurocone connector cores (3/4"), one for each pipe end
• Isolation: 1 x Manifold Ball Valve Set 1"
• Pump and mixing: 1 x UFH Manifold Blending Valve Pump Pack with a Bastion A-rated pump, mixing the boiler water down to floor temperature
• Actuators: 3 x 2-Wire Thermal Actuators 230V, one on each loop
• Zone valve: 1 x 2-Port Motorised Zone Valve
• Controls: 1 x Heatmiser neoStat WiFi, with app control and no hub needed
• Heat source: The Chapel's oil or LPG boiler

On site

Heating a chapel floor

A chapel is one big, tall room with solid walls, so the heat needs to come from the whole floor rather than a few radiators. Underfloor heating warms the space from the floor up, where people actually sit and walk, and leaves the walls and arched windows clear.

The floor at Allgreave is broken up by iron columns, so the loop design runs each loop around them while keeping the pipe at its designed centres. The castellated panels hold the pipe in place without clips, which keeps every bend neat until the screed goes down. PERT-AL-PERT multilayer pipe has an aluminium core, so it holds its shape on the tight turns around each column. Edge insulation runs around every wall to let the screed expand and to stop heat leaking into the old stone.

Three loops of 16mm pipe run back to a 3 port Dualmix manifold. Water from an oil or LPG boiler comes out far hotter than a screed floor needs, so a blending valve pump pack on the manifold mixes it down to floor temperature before it reaches the loops.

The whole open floor runs as one zone on a single Heatmiser neoStat WiFi, with a thermal actuator on each loop. It joins the home WiFi directly, so the owners can set the heating from their phone between guests without a separate hub.

Read more: How to install castellated panel underfloor heating, MLCP multilayer pipe guide, UFH mixing and blending valves, Underfloor heating with a boiler and Underfloor heating in Cheshire.