V
vetinry
Hello everyone
This is my first post here although I've been browsing for the last few days.
I apologise if this specific question has been asked before but if so, I haven't found it.
We bought a house back in February and I'm mid way through first of many refurbishment projects.
This has involved knocking down a wall between Kitchen and Dining room to make one large room.
The floor is simply polished floorboards over battens and they're not particularly well secured.
I'd like to add underfloor heating but:
a. I'm a bit restricted by floor height (currently 85mm to top of floorboards) which is the same throughout the downstairs of the property
b. The house was built in 1987 so I'm guessing there isn't much in the way of insulation in the concrete slab.
So, what I'm thinking to try and keep height to a minimum is
55mm battens at approx 300mm centres.
40mm Kingspan K3
15mm water pipes clipped to insulation
Dry screed mix (or kiln dried sand) to surround pipes to top of battens
This is where the potential problems start.
Since height is a concern, I have thought about using 12mm tiles and allowing 3-5mm for adhesive.
So, by using 18mm plywood, this will bring the overall floor height in at 3-5 mm over rest of house (I can certainly live with this)
I guess the questions are:
I've just popped a request for an experienced floor tiler in the relevant section. I live in South Oxfordshire, just off the A34
Best wishes
Steve
This is my first post here although I've been browsing for the last few days.
I apologise if this specific question has been asked before but if so, I haven't found it.
We bought a house back in February and I'm mid way through first of many refurbishment projects.
This has involved knocking down a wall between Kitchen and Dining room to make one large room.
The floor is simply polished floorboards over battens and they're not particularly well secured.
I'd like to add underfloor heating but:
a. I'm a bit restricted by floor height (currently 85mm to top of floorboards) which is the same throughout the downstairs of the property
b. The house was built in 1987 so I'm guessing there isn't much in the way of insulation in the concrete slab.
So, what I'm thinking to try and keep height to a minimum is
55mm battens at approx 300mm centres.
40mm Kingspan K3
15mm water pipes clipped to insulation
Dry screed mix (or kiln dried sand) to surround pipes to top of battens
This is where the potential problems start.
Since height is a concern, I have thought about using 12mm tiles and allowing 3-5mm for adhesive.
So, by using 18mm plywood, this will bring the overall floor height in at 3-5 mm over rest of house (I can certainly live with this)
I guess the questions are:
- Is 18mm ply is sufficient to avoid movement - I can screw it down along the battens as closely spaced as necessary.
- Will glueing the battons to the floor help reduce any movement in the floor?
- Are there any other options to give a stable base but without too much additional height (insulation plus screed is going to be much higher) since I have already cut insulation down to an absolute minimum
- How much will 18mm ply restrict heat to the tiles?
- Will a very good quality flexible adhesive help?
I've just popped a request for an experienced floor tiler in the relevant section. I live in South Oxfordshire, just off the A34
Best wishes
Steve