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OVERLAY

TM

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Overlay

TM

 is a unique low profile floor 

heating system ideal for both renovation 

and new build projects. 

Installed over the existing floor and only 18mm in depth, Overlay™ allows 
floor heating to be installed where traditional under floor systems would 
either require expensive excavation or would require the floor to be raised 
to an unacceptable level.

The Overlay™ system is available in 2 panel types to allow for installation 
to all build types and floor coverings.

Overlay™

 panel is a fibrous panel used for heavyweight floor coverings such 

as ceramics, or where the floor covering needs to be secured directly to the 
panel, e.g. solid wood.

Overlay™ Lite

 is a high compressive strength, lightweight insulated panel 

used for lightweight floor coverings, e.g. laminate, engineered wood and carpet. 
Due to its ease of handling and cutting it is also more suitable for larger areas 
and multiple room installations.

Overlay™ systems use a 12mm pipe at 150mm pipe centres and provide 
excellent response times and heat output compared with traditional built 
in under floor heating solutions and are therefore ideal for both traditional 
heating systems and low temperature renewable systems.

Under floor heating 

that fits over 

existing floors

Summary of Contents for Under Floor Heating Systems

Page 1: ...s Broomhouse Lane Edlington Doncaster DN12 1ES Tel 01709 770 000 Fax 01709 770 001 2410 London Road Mount Vernon Glasgow G32 8XZ Tel 0141 778 8822 Fax 0141 778 2703 Dromore Road Lurgan Craigavon Co Ar...

Page 2: ...revious printed copies will become out of date The latest version of our installation advice including a downloadable version of the current Technical Installation Guide can be found at our trade webs...

Page 3: ...xtensive back up service Technical representation available to discuss systems in general and particular projects www ufch com Technical Installation CD Specialist Technical Hotline on 01709 770000 En...

Page 4: ...he floor screed is required by Building Regulations Edge insulation also acts as an expansion joint Floating Floor When installed in floating floors Polyplumb pipe is simply pressed in to the pre form...

Page 5: ...r requires a bespoke design You then simply input data for each room providing floor type room size and control zones to calculate the required pack All packs have a single order code and include all...

Page 6: ...h when heated will reduce to 8 9 and cause only a very small amount of shrinkage The floor will re absorb some moisture when the heating is not operating and the moisture content will increase to 12 1...

Page 7: ...d around the perimeter of the room using staples so as to prevent possible risk of the panels lifting Preparing the pipe Step 4 You will need to remove the coil from the bag leaving the shrink wrap on...

Page 8: ...ted the screed cover can be applied Care should be taken to ensure that the screed is tightly compacted around the pipe to ensure that no voids are present The system should remain under pressure 6 ba...

Page 9: ...nder pressure whilst the flooring is laid Finishing The room can then be finished by fitting 18mm or 22mm tongue and groove sheets of chipboard glued on the edge over the floating floor system Mark th...

Page 10: ...hed downwards and away from the underside of the timber finished floor covering as this could lead to potential underperformance of the system Testing Step 4 Once the pipe circuits have been installed...

Page 11: ...These can be fixed directly through the spreader plate down in to the joists below It is important to indicate the position of pipework in areas where the additional fixing of items such as carpet gri...

Page 12: ...heir high output at relatively low flow temperatures Modular Heating Panels are ideal for maximising heat efficiency and lowering energy consumption In most installations it is not necessary to cover...

Page 13: ...should be selected The span is defined as the free space from wall to wall that needs to remain uninterrupted by trimmers or other services Ideally install MHP panels prior to other services whenever...

Page 14: ...omes into direct contact with it Always ensure that electrical cables are not in physical contact with the MHP panels using tape or a polythene strip Finishing Once you have connected your system up t...

Page 15: ...for heavyweight floor coverings such as ceramics or where the floor covering needs to be secured directly to the panel e g solid wood Overlay Lite is a high compressive strength lightweight insulated...

Page 16: ...is should be the first consideration for most projects The more structural nature of Overlay however makes it ideal for direct tiling or application of floor finishes which need to be fixed or screwed...

Page 17: ...mple of blanking in a bathroom Example of squaring off an irregular room plan Room layouts The following diagrams show some examples of room shapes pipe requirements and interruptions pillars hearths...

Page 18: ...wood floors they can be discretely screwed through the tongue and groove directly into the Overlay panel avoiding pipe circuitry to minimise movement in the floor covering If over boarding with 6mm p...

Page 19: ...r covering as normal It is advisable to mark out pipe positioning to avoid stapling pipes when fitting carpets 36 37 Overlay Lite for lightweight floor coverings Installation Laying end returns Step 1...

Page 20: ...stic hot water primary circuits To provide independent hydraulic control of the entire system it is important that the installation is designed as an S Plan or S Plan Plus configuration which allows f...

Page 21: ...d in under floor heating systems is less than that required for radiators or stored hot water If these other services are connected to the same boiler it will be necessary to control the water tempera...

Page 22: ...iring centre and slave units Available in two surface finishes and offers the following features Large touch screen display with high visibility blue LED backlight On screen display shows current stat...

Page 23: ...distribution pipe work Connection from nearest radiator 260mm 200mm Pump Pipe thermostat Heating return Heating flow Under floor heating flow Under floor heating return Thermostatic blending valve Pu...

Page 24: ...ible tap connectors for the simplest method of connection Close all under floor heating circuits except one by screwing down the blue caps and closing the isolating valves situated on top of the manif...

Page 25: ...resistant to the build up of scale Short term chlorination for disinfection of supply pipe work and normal levels of chlorine in UK domestic water supplies will not have an adverse effect on the integ...

Page 26: ...ng should be done with all switches on and room thermostats calling Fault finding complete Adjust pump speed and set flow rates in accordance with the system design data as provided NO NO Is the boile...

Page 27: ...Manufacturing quality assurance In accordance with BS ES ISO 9001 2000 BSI registered firm Certificate FM00318 Installation standard To follow the recommendations of BS5955 Part 8 2001 Plastic Pipewo...

Page 28: ...OR HEATING REQUIREMENTS Manifold Position s Please also indicate on drawing Floor Type Solid Suspended Floating MHP Overlay Overlay Lite Ground Floor 1st Floor 2nd Floor CONSTRUCTION DETAILS If NOT to...

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