Electric underfloor heating in Mosman
We install electric underfloor heating across Mosman, where more is spent renovating homes than building them. Flats are 52.0% of homes here and seven in ten of those sit in a block of three storeys or less. Mornings here are among the mildest in Sydney, and a tiled floor is cold regardless because it holds the overnight temperature. We put under tile heating mats into walk up bathrooms here, and in screed heating cable into harbour house additions.
The benefits of electric underfloor heating in Mosman
Flats are 52.0% of homes here and separate houses 34.9%, with semis and townhouses between them. Most of the reasons below follow from a decision Council took in 1973. The rest follow from the harbour views Council protects and the hours the network charges most.
A ban on high rise shaped every flat here
Council's own history records that by 1973 high rise development was banned here. 24.7% of all homes in this area now sit in a three storey walk up. The benefit of under tile heating mats is that they warm a walk up bathroom without touching the slab below. Nothing is drilled into the structure and nothing is chased into a party wall.
More is spent renovating here than building new
Across eight years, renovation in this area was worth more than all new residential building put together. That ratio runs the other way in every other area we have written up. Under tile heating mats warm a tiled room sooner than our other two systems, which suits a renovation taken one room at a time.
The chimney stays even when the fireplace goes
Council's heritage controls say to maintain existing chimney stacks even where fireplaces are to be removed. The reason given is that the stacks establish heritage character. The benefit of under tile heating mats is that they warm a room with no flue, no chimney and nothing on the roof. Not one of the 482 heritage items here lists an interior, and the controls say nothing about floors.
A timer keeps floor heating off the evening peak
The network here charges most between 3pm and 9pm every day of the year. The benefit of our thermostats is that they run on a timer, so floor heating warms the room before that window opens. Only 12.1% of homes here have a controlled load or off peak circuit to run it on instead. A tiled floor holds its warmth right through the evening once the heating has gone off.
The foreshore rule only lets you rebuild
The local plan permits only the rebuilding of an existing building inside the foreshore area here. A scenic protection area covers about 59% of this one, and work there must minimise visual impact from the harbour. Under tile heating mats sit inside the tile bed of a room nobody can see from the water. So the benefit is heating you can add without arguing a single line of either control.
Floor heating puts no unit on an outside wall
Council's plan says air conditioning plant must be screened where it is visible from the street or a neighbour. Consents here also cap the noise it makes at 5 decibels above background. Floor heating has no outdoor unit, so there is nothing to screen and nothing to measure. Our thermostats are the only part of an installed system anyone ever sees, and they sit inside the room.
What we would install in Mosman
More than half the homes here are flats, and most of those flats are in a three storey block.
A mat under the tiles
70% of the flats here sit in three storey blocks, and a walk up bathroom is the job we see most. Under tile heating mats are cut and turned on their mesh to fit around a small bathroom's fixtures.
Under tile heating matsCable in a screed
A rear addition on the Beauty Point and Clifton Gardens slopes is where a screed topping goes down. In screed heating cable is bedded into that topping, and the extra mass holds the heat longer.
In screed heating cableCable in a slab
About 19 new houses a year are approved here, which makes a poured slab the rarest of the three. In slab heating cable is tied to the reinforcement and adds no height at all to the finished floor.
Slab heating cables, dual coreWhy Mosman properties choose us
We install across Mosman and the rest of the Mosman area, and we size every job from your floor plans before we quote. Installation is always subject to checking installer availability, which we do before we agree a day.
How we install underfloor heating in Mosman
Plans first, then a quote
Send us the plans for your new home, renovation, office or hotel. We measure the heated areas from them, calculate the cable size and quote the materials. If you want us to install, a second quote covers the installation labour. Nothing is ordered and no day is booked until you accept.
Installation day
Once you accept and tell us the job site is ready, we agree a day, subject to checking installer availability. The floor has to be prepared and ready before that day: your own trades handle levelling, waterproofing and anything else above the slab. Our installer lays the cable or the mat, fits the thermostat, and tests the system with our own equipment before leaving site. Your tiler covers it with the screed or the tile bed.
In a strata building the path is different again
In a New South Wales strata scheme the lot boundary generally sits at the upper surface of the floor. The slab underneath belongs to the building rather than to you. We lay the mat into the tile bed instead of touching that slab, and nothing is drilled or chased into it. Installing hard flooring, and the wiring and power points that come with it, is a minor renovation under the Strata Schemes Management Act 2015. Waterproofing is carved out of that definition, so a full bathroom rebuild goes to a special resolution rather than an ordinary one. Your builder or project manager deals with the owners corporation, and we build to whatever that approval allows.
Saturday starts quietly at seven
Nothing on a Mosman street is reserved for a trade, and the Saturday starts quietly. Audible site works are restricted to 7am to 6pm Monday to Friday and 8am to 1pm on the Saturday. Nothing at all is allowed on Sundays or public holidays. There is no out of hours permit published at all. Visitor permits run to forty a year per property, the first ten of them free, and there is no tradesperson permit. So we book the floor heating install to the one day the room is open and the tiler is ready.
Underfloor heating for Mosman homes
A ban in 1973 and the stock it left behind
Council's own history records that public concern about flat development grew through the late 1950s, and that by 1973 high rise development was banned. Flats are 52.0% of homes here and 70% of them are in blocks of three storeys or less. 24.7% of all homes in this area are in a three storey block, which is third in the state. About 93% of the flats standing today already existed in 2006. So the bathroom we are asked into is usually original, and under tile heating mats go in as it is retiled.
Houses on the slopes and flats on the spine
Beauty Point and The Spit are 93% separate houses and the Clifton Gardens and Georges Heights belt 82%. About 85% of those houses have four bedrooms or more. The flat spine along Military Road and Spit Road holds 45% of the area's homes and is 81% flats. Three storey walk ups make up 40% of the homes on that spine. The house count fell from 4,343 in 2006 to 4,028 in 2021 as sites went to units. So a whole floor on the slopes takes in screed heating cable, and the spine takes under tile heating mats.
Renovation is worth more here than building
Renovation in this area was worth more across eight years than all the new residential building put together. No other area we have written up is the right way up on that measure. About 19 new houses a year are approved, and 11.3% of homes were empty on census night. A 2009 count found 761 strata schemes and 7,177 lots here, averaging about nine lots each. So most of what we install here is under tile heating mats, in one bathroom, for one owner.
Winter mornings in Mosman
Observatory Hill is the record for this area, about five kilometres across the harbour and between 3.2km and 7.4km from any part of it.
- July nights
8.1°C at Observatory Hill, about five kilometres across the harbour and the nearest long record to Mosman. A tiled floor sits close to that overnight, and it is the first thing a bare foot meets in the morning.
- Frost
Observatory Hill has recorded no night at or below 2°C in an average year. The overnight low is what decides how cold the floor is at seven in the morning.
- Climate zone
Zone 5 across the whole of Mosman, which is one suburb and one postcode. Insulation under the heating is what keeps the warmth in the room, and it is sized from that zone.
Get a free quote in Mosman
Tell us what you need done in Mosman and we will get back to you with a price as soon as we can. There is no obligation to go ahead.
Services we provide in Mosman
New home builds
Home renovations
Bathroom renovations
Apartments
Hotel bathrooms
Office buildings
Cold storage and frost heave
Suburbs we service in Mosman and surrounds
We install across the Mosman area and the surrounding localities, and we check installer availability before we agree a day. If your suburb is not listed below, contact us and we will confirm coverage.
Frequently asked questions about Mosman
Do you cover every suburb in the Mosman area?
Yes. We install across the Mosman area and the surrounding localities, including every suburb listed on this page. We check installer availability before we agree a day, which is the one condition that travels with every job. If your suburb is not shown, contact us with the address and we will confirm coverage before we quote.
What are your service hours in Mosman?
Our hours are Monday to Friday, 8am to 5:30pm, and we are closed on Saturday and Sunday. Plans and photographs can be sent at any time through the quote form on this page. If you need us on site in Mosman, the day is agreed once we have checked installer availability. It is worth sending the plans as early as you can.
Why are so many flats here only three storeys?
Because high rise development was banned in 1973. Council's own history records the public concern about flat development through the late 1950s and the ban that followed it. 70% of the flats here now sit in blocks of three storeys or less, which is the highest share of any area in Sydney. A bathroom in one of those has often never been stripped since the block was built. The benefit is that under tile heating mats go in during that retile, with no extra floor work.
Can I take out the fireplace and keep the chimney?
Yes, and Council asks you to. Its heritage controls say to maintain existing chimney stacks even where fireplaces are to be removed, because they are important elements in establishing heritage character. So the stack stays and the fire does not have to. That is one reason a floor comes up here. Under tile heating mats need no flue, so floor heating is what replaces the fire you take out.
What exactly does a Mosman heritage listing protect?
The outside, on the schedule at least. Mosman's 482 listed items name no interior between them. The controls say nothing about interiors, floors or services. Asking for a heritage exemption costs nothing in this area. How long it takes is not published, so ask at the counter when you lodge. So under tile heating mats inside a listed house here raise no question under the controls at all.
Where does a van park on a Mosman street?
Wherever a visitor would, because nothing is reserved. This area has no tradesperson parking permit, and visitor permits run to forty a year per property with the first ten free. Audible work is restricted to 7am to 6pm on weekdays and 8am to 1pm on Saturday. An extra quiet hour runs from 7am on the Saturday. The benefit of under tile heating mats is that they arrive as light rolls and carry in by hand.
Does a heated floor need anything outside the wall?
No, and on a Mosman block that is worth more than it sounds. Council asks that air conditioning plant is screened wherever it is visible from a street, a public place or a neighbour. The consent caps the noise it makes as well. An electric floor has no condenser, no flue and no box on an outside wall. Under tile heating mats sit beneath the tiles, and our thermostats are the only part on view.
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