- Joined
- 25 Apr 2016
- Messages
- 2,395
- Reaction score
- 555
- Country
Put underfloor heating into the bathroom was the thought. It will only take a couple of weekends…
So the bathroom, built in 1960 to a 1930’s cottage has 3 outside walls although one is a party wall. Prepared a detailed plan of the room(s) – the toilet is (was - more below) a separate room inside the bathroom.
I worked the floor area out to be 4.75 SqMtr. 'Cause of that bought 6SqMtr of tiles when on offer. Took the plan in to a supplier for a quote – they suggested that I'd need 4SqMtrs of heated mat (cottage is principally electric heated as there is no gas in the village {apart from that generated by the old women talking about the neighbours}). The ‘quote’ also included self levelling compound and adhesive...
So we started, builder chappy organised to lay the UF mat and tiles. I lifted the original floor vinyl tiles. We then decided that insulating the walls would be a good idea as the loft was done when the slates re-laid. That made us think about 'cold' spots so we then knocked the internal toilet wall down – b****y ash blocks - so dusty. As the concrete floor didn’t have any sign of a Damp Proof Membrane I painted down 2 thick coats of 'Synthaproof' type paint (Actually the Wickes equivalent); that stuff remains tacky.
The tile suppliers said that 1 bag of SLC would be enough; having taken the wall down I decided that where the wall was would take most of that so I added couple of more bags.
Builder chappy arrived early on Monday morning and we started with the SLC to find that the 3 bags was barely enough – so more collected as will need more to spread into the 'mat'.
It is worth noting that the SLC will spread/run when and where you don't want it to go, we used battening to restrain that running around; also, if you haven't used it before a blunt spike roller gets the air out of the mix most effectively. Also something we Builder and I where unprepared for was the drying time of the SLC anything upto 72 hours – we should have started on Friday… (as we were away for the weekend.)
So following Wednesday we returned to the bathroom and laid the insulating mat (10mm) taped up the joints and then started with the heating mat – now as I said above I worked out the floor area to be 4.75SqMtr and bought 4SqMtr of mat; with need for 80mm separation from walls and neighbouring element and that where the mat is nothing should be on the heated floor 3.5SqMtr would have been sufficient… In fact we had real difficulty to ‘loose’ the whole mat into the floor area.
The Mat and loose element was fixed with tale making sure that no air gaps existed around the mat. Then SLC was laid over the top – again more SLC was needed.
On Friday the builder chappy returns with tools to lay the tiles – the ‘glue’ was a rapid set stuff from Larsen – 2 bags used.
Once laid (and supply of food from the local consumed) the floor was grouted.
Materials used to date:-
4SqMtr heating mat (800 watt),
6 insulating panels,
Damp proof liquid,
2 bags adhesive
8 ! bags SLC.
You, the reader may be wondering about the availability of bathroom facilities (toilet, shower, basin, etc) – luckily we have a camping toilet and the kitchen sink we can use.
To be contined.
So the bathroom, built in 1960 to a 1930’s cottage has 3 outside walls although one is a party wall. Prepared a detailed plan of the room(s) – the toilet is (was - more below) a separate room inside the bathroom.
I worked the floor area out to be 4.75 SqMtr. 'Cause of that bought 6SqMtr of tiles when on offer. Took the plan in to a supplier for a quote – they suggested that I'd need 4SqMtrs of heated mat (cottage is principally electric heated as there is no gas in the village {apart from that generated by the old women talking about the neighbours}). The ‘quote’ also included self levelling compound and adhesive...
So we started, builder chappy organised to lay the UF mat and tiles. I lifted the original floor vinyl tiles. We then decided that insulating the walls would be a good idea as the loft was done when the slates re-laid. That made us think about 'cold' spots so we then knocked the internal toilet wall down – b****y ash blocks - so dusty. As the concrete floor didn’t have any sign of a Damp Proof Membrane I painted down 2 thick coats of 'Synthaproof' type paint (Actually the Wickes equivalent); that stuff remains tacky.
The tile suppliers said that 1 bag of SLC would be enough; having taken the wall down I decided that where the wall was would take most of that so I added couple of more bags.
Builder chappy arrived early on Monday morning and we started with the SLC to find that the 3 bags was barely enough – so more collected as will need more to spread into the 'mat'.
It is worth noting that the SLC will spread/run when and where you don't want it to go, we used battening to restrain that running around; also, if you haven't used it before a blunt spike roller gets the air out of the mix most effectively. Also something we Builder and I where unprepared for was the drying time of the SLC anything upto 72 hours – we should have started on Friday… (as we were away for the weekend.)
So following Wednesday we returned to the bathroom and laid the insulating mat (10mm) taped up the joints and then started with the heating mat – now as I said above I worked out the floor area to be 4.75SqMtr and bought 4SqMtr of mat; with need for 80mm separation from walls and neighbouring element and that where the mat is nothing should be on the heated floor 3.5SqMtr would have been sufficient… In fact we had real difficulty to ‘loose’ the whole mat into the floor area.
The Mat and loose element was fixed with tale making sure that no air gaps existed around the mat. Then SLC was laid over the top – again more SLC was needed.
On Friday the builder chappy returns with tools to lay the tiles – the ‘glue’ was a rapid set stuff from Larsen – 2 bags used.
Once laid (and supply of food from the local consumed) the floor was grouted.
Materials used to date:-
4SqMtr heating mat (800 watt),
6 insulating panels,
Damp proof liquid,
2 bags adhesive
8 ! bags SLC.
You, the reader may be wondering about the availability of bathroom facilities (toilet, shower, basin, etc) – luckily we have a camping toilet and the kitchen sink we can use.
To be contined.
Last edited:
