UNDER FLOOR HEATING
I recently built a conservatory as an extension to my house.  I live in the Welsh mountains on the side of an exposed hill so the heating had to be adequate especially in view of the fact that the conservatory is glass to the ground.  There was no room for a radiator and electric fan heaters are noisy and expensive to run.  The solution had to be under floor heating.  I could not find any reasonable information on under floor heating so armed with what I could find I decided to experiment.  The experiment was an absolute success so I thought I would share it with anyone trying to find information.  The technical department of Hepworth Company were a great help.

Underfloor Heating

Place 50mm of polystyrene insulation on top of concrete sub floor.
Lay steel concrete reinforcing mat on top of the polystyrene.  This is to fix pipe clips to it also helps reinforce the screed on top of the polystyrene.
Fix plastic pipe clips to the steel mat.  I used insulation tape (See photo) it doesn't matter its only to hold the pipe until the screed sets.
Coil the pipe in large circles about 300mm apart until you reach the centre of the room.
Loop back at 300mm intervals in between the previous loops (see photo) this means that the pipes are now 150mm apart.
(HEPWORTH HEP20 PIPE.) Tip (IF YOU ARE CONNECTING TO AN EXISTING COPPER PIPE SYSTEM USE HEP20 BARRIER PIPE)
It is very important that the pipes are coated liberally in diluted PVA glue.  This is to ensure that the screed adheres to the pipe.  Any gaps will act as an insulator and defeat the object.
Cover the pipes in a 75mm sand and cement screed.  Make sure the screed is compacted underneath the pipes to prevent the floor from cracking.
Cover with floor tiles:  The result is amazing.
There are no cold areas to the floor therefore there are no down draughts.  The floor stays warm until the early hours of the morning.
It is quite simple to zone the system from your existing system if necessary though I have not found it expensive to run.

Under Floor  Heating
The Pipe layout Looped at centre

Laying the screed

    Laying the screed

December it's still warm

    Relaxing in the Summer

If I ever build my own house I will certainly install under floor heating.

For morre information please email me.
 

Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating
Under floor heating,  Under floor heating