Morning,
I am in the process of extending my kitchen into an old wash room and external toilet. Original floors have been dug up and filled with hardcore, compacted and levelled off with sand. I have added a layer of DPM and then added a 100mm slab of concrete.
I have got another 150mm till I am at the correct level of my dining room.
On top of the slab, my thinking is to add insulation, underfloor heating, plywood and then tile on top of the ply.
~ Insulation is going to be 100mm PIR boards Celotex/Kingspan
~ Underfloor heating is, 16mm Polypipe 'Overlay', which is an insulated panel with the pipes laid in the insulation
~ Ply is added at 6mm thick on top of the UFH
~ Tiles to be on top of the ply, i have assumed a depth of 25mm for the tile and adhesive
Total 147mm
Looking on the Polypipe website http://www.polypipe.com/polypipe/site/overlay-home it states that
"Tiles can be laid directly on to the Overlay™ panels or a 6mm plywood lining can be fitted prior to tiling. When tiling directly over Overlay™ panels, use a sealant with flexible adhesive and grout"
So I will be getting my tiler to use a flexible adhesive but i am a wondering if it is acceptable to have the tiles situated on top of two layers of effectively floating polystyrene boards. Or do i have have to make sure that the cutting of the boards is cock on, so that no float on the polystyrene is present? Or can the insulation be 'fixed' to the slab to stop any movement in the plane of the floor?
Or am i completely wrong with my insulation on top of my slab? I just don't see the point of using my UFH to heat up my slab.
The UFH system has been recommend to me by my plumber, as it is supposed to be more efficient and faster at heating up.
Also i will need to put a channel in the floor to account for the gas and water needed in the kitchen. Would people just use the generic 'U' shape ducting, but again i was wondering how i would fix the ducting to the insulation?
Sorry for all the questions
Cheers
I am in the process of extending my kitchen into an old wash room and external toilet. Original floors have been dug up and filled with hardcore, compacted and levelled off with sand. I have added a layer of DPM and then added a 100mm slab of concrete.
I have got another 150mm till I am at the correct level of my dining room.
On top of the slab, my thinking is to add insulation, underfloor heating, plywood and then tile on top of the ply.
~ Insulation is going to be 100mm PIR boards Celotex/Kingspan
~ Underfloor heating is, 16mm Polypipe 'Overlay', which is an insulated panel with the pipes laid in the insulation
~ Ply is added at 6mm thick on top of the UFH
~ Tiles to be on top of the ply, i have assumed a depth of 25mm for the tile and adhesive
Total 147mm
Looking on the Polypipe website http://www.polypipe.com/polypipe/site/overlay-home it states that
"Tiles can be laid directly on to the Overlay™ panels or a 6mm plywood lining can be fitted prior to tiling. When tiling directly over Overlay™ panels, use a sealant with flexible adhesive and grout"
So I will be getting my tiler to use a flexible adhesive but i am a wondering if it is acceptable to have the tiles situated on top of two layers of effectively floating polystyrene boards. Or do i have have to make sure that the cutting of the boards is cock on, so that no float on the polystyrene is present? Or can the insulation be 'fixed' to the slab to stop any movement in the plane of the floor?
Or am i completely wrong with my insulation on top of my slab? I just don't see the point of using my UFH to heat up my slab.
The UFH system has been recommend to me by my plumber, as it is supposed to be more efficient and faster at heating up.
Also i will need to put a channel in the floor to account for the gas and water needed in the kitchen. Would people just use the generic 'U' shape ducting, but again i was wondering how i would fix the ducting to the insulation?
Sorry for all the questions
Cheers