[NWH]

Introduce a detergent and it cleans way better with cold I agree but let’s talk in terms of speed as well as the overall job with hot water Darren,once you start using detergent you are in to rinsing to the cows come home territory.
The idea of WFP is no chemicals cover the  glass in a detergent or chemicals you’ll leave spots and runs and risk  a very good chance of doing an awful job,the only time I would ever use chemicals is on either a first clean roof or windows that have lots of trim that’s gone green.
 

[deeege]

Any cold users got any con roof cleans booked in for tomorrow morning in the Manchester area or South East come to that,it’s tatas down here too 🥶

It’s forecast 10°c here for 9am tomorrow, the struggle will be real 

[james peters]

for CRYING OT LOUD

Go to work if you are able , take precautions not to freeze by whatever method .
if its to cold to work , stay home
if its to cold to work it will probably mean that you look like a desperate TIT whether you are using hot or cold .
Hot water will still freeze  all over their paths anyway.

I am lucky as my tap water is 49ppm at the moment so I just fill up with hot through the DI.

[NWH]

I don’t do houses that have many paths round em 🤣🤣 there’s a very knowledgeable bloke I know will tell you about hot water,his names Luke Warm lol.
I diesel heater solves all these I’m frozen up I can’t work my pumps like ice problems trust me,combine an electric reel and an Extreme poles and you’re day won’t be any easier this is me signing off banging my head against another brick wall lol.

[NWH]

But you couldn’t tell me how to stop my van from freezing up could you 🤣🤣🥶

[dazmond]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

[dazmond]

I hadn't planned on working today anyway..... been for my haircut,gym and booked a 10 day holiday to the Maldives for next October.....

[Smudger]

Introduce a detergent and it cleans way better with cold I agree but let’s talk in terms of speed as well as the overall job with hot water Darren,once you start using detergent you are in to rinsing to the cows come home territory.
The idea of WFP is no chemicals cover the  glass in a detergent or chemicals you’ll leave spots and runs and risk  a very good chance of doing an awful job,the only time I would ever use chemicals is on either a first clean roof or windows that have lots of trim that’s gone green.

you really don't read at all do you - hot water is superior when used with detergents - detergents work better when used with hot water

pure water on its own cleans exactly the same hot or cold for the majority of window cleans

please try to read things - but then again perhaps this is you think hot water put wear marks into glass ??

 

Darran

[Smudger]

Just taking the time to show you what's written Nige.....
I live in hope that one day you might engage a couple more brain cells and debate a subject rather than be a billy boo ya sucks..

Niggle - your always arguing from a point of ignorance never fact..

Hot or cold pure cleans the SAME! - introduce detergent and hot significantly cleans better (because the detergent works better)
for the vast majority of what we clean there is no difference only a comfort factor

- and I again remind you - you used to say that hot water would wear out glass prematurely 
what a joke

Darran

[NWH]

I’m not saying it doesn’t work Darren I’m saying you will need to rinse more m8.

[NWH]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

I know I did the same today Daz de-iced a couple of conservatory’s on the backs of places glass and frames if you go over them with cold it just looks like your icing a cake it goes nowhere,I should have used a bit of detergent that would have done the trick 🤣

[windowswashed]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

Absolutely disagree with you!

If you pour one litre of hot  water over glass that's not frozen in sub zero temperature, it will freeze up quicker than cold will .....it's a well known proven fact called mpemba effect, look it up on google. Cold water is denser, hot water evaporates quicker.

Mpemba effect:  As the initially warmer water cools to the initial temperature of the initially cooler water, it may lose significant amounts of water to evaporation.  The reduced mass will make it easier for the water to cool and freeze.  Then the initially warmer water can freeze before the initially cooler water, but will make less ice.

[windowswashed]

Here's the dilema, hot water cleans better than cold water because it's molecular structure changes allowing it to absorb more contaminants and various other technical jargon: however cold water freezes slower in sub zero then hot simply because it's denser and loses less volume through evaporation.

Whilst the hot water will ice up quicker than cold water, it will be less dense because a larger volume of density has been evaporated.  So thinner ice will have been warmer water, hence why as heat rises horizontally, it's always the bottom of the pane that has the thicker ice and also thanks to gravity.                   

[Jonny 87]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

Absolutely disagree with you!

If you pour one litre of hot  water over glass that's not frozen in sub zero temperature, it will freeze up quicker than cold will .....it's a well known proven fact called mpemba effect, look it up on google. Cold water is denser, hot water evaporates quicker.

Mpemba effect:  As the initially warmer water cools to the initial temperature of the initially cooler water, it may lose significant amounts of water to evaporation.  The reduced mass will make it easier for the water to cool and freeze.  Then the initially warmer water can freeze before the initially cooler water, but will make less ice.

I know about the Mpemba effect, but honestly, in the real world of window cleaning it doesn’t happen. Perhaps with boiling water where evaporation is more prevalent? Who knows. We only use warm/hot.

Have you tried this in practice? I presume the theory behind it must be that it occurs in a specific set of scientific circumstances that in the real world we just don’t see.

For instance…….. a conservatory that has no heating and glass is all frozen up.

Cold water user - your water adds to the ice on the windows, it’s impossible to clean without scraping everything off, and even then it’s likely to ice up as soon as you start.

Hot water user- you thaw the ice off first in a few seconds, then clean the window as normal. In my experience the residual heat you put on the glass stops the few remains droplets freezing, but even if they do freeze it’s pure water that when it thaws out it looks perfect.

If the Mpemba effect was evident in our job then hot water would be very less effective, and I’d be noticing it every winter. In reality, I don’t.

Feels like Groundhog day with these conversations but I can’t help myself.  🤦‍♂️

[DJW]

I’ve been put off Golf GTD’s Audi RS’s and the Maldives for life.

[Spruce]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

Absolutely disagree with you!

If you pour one litre of hot  water over glass that's not frozen in sub zero temperature, it will freeze up quicker than cold will .....it's a well known proven fact called mpemba effect, look it up on google. Cold water is denser, hot water evaporates quicker.

Mpemba effect:  As the initially warmer water cools to the initial temperature of the initially cooler water, it may lose significant amounts of water to evaporation.  The reduced mass will make it easier for the water to cool and freeze.  Then the initially warmer water can freeze before the initially cooler water, but will make less ice.

I know about the Mpemba effect, but honestly, in the real world of window cleaning it doesn’t happen. Perhaps with boiling water where evaporation is more prevalent? Who knows. We only use warm/hot.

Have you tried this in practice? I presume the theory behind it must be that it occurs in a specific set of scientific circumstances that in the real world we just don’t see.

For instance…….. a conservatory that has no heating and glass is all frozen up.

Cold water user - your water adds to the ice on the windows, it’s impossible to clean without scraping everything off, and even then it’s likely to ice up as soon as you start.

Hot water user- you thaw the ice off first in a few seconds, then clean the window as normal. In my experience the residual heat you put on the glass stops the few remains droplets freezing, but even if they do freeze it’s pure water that when it thaws out it looks perfect.

If the Mpemba effect was evident in our job then hot water would be very less effective, and I’d be noticing it every winter. In reality, I don’t.

Feels like Groundhog day with these conversations but I can’t help myself.  🤦‍♂️

Under extremes there could be some validity to the Mpemba effect. I would certainly agree with you that in the area I work and conditions I work in, I can't see it having an effect on me.  Water was leaving the heater at 50 degrees yesterday, and just barely  warm at the jets with 30 or so meters of hose out on the ground.
For me, just having  more manageable hoses and a warm pole to hold is the plus. I don't wear gloves.

There are even some scientists who question the Mpemba effect.  I assume that those who do aren't also members of the flat earth society.

[dazmond]

Hot water freezes quicker on glass than cold water when temperature is below zero. Worse windows to clean when below zero are conservatories with no internal heating.

No it doesn't mate.....I thaw ice off glass and frames in cold weather with hot water...when I used to use cold it wouldn't touch it....

Absolutely disagree with you!

If you pour one litre of hot  water over glass that's not frozen in sub zero temperature, it will freeze up quicker than cold will .....it's a well known proven fact called mpemba effect, look it up on google. Cold water is denser, hot water evaporates quicker.

Mpemba effect:  As the initially warmer water cools to the initial temperature of the initially cooler water, it may lose significant amounts of water to evaporation.  The reduced mass will make it easier for the water to cool and freeze.  Then the initially warmer water can freeze before the initially cooler water, but will make less ice.

You say the same thing every year!

However it doesn't happen day to day cold weather window cleaning...quite the opposite actually,defrosting velux windows is an added service for me in the winter months! (and the occasional customers windscreen!)

[G Griffin]

I hadn't planned on working today anyway..... been for my haircut,gym and booked a 10 day holiday to the Maldives for next October.....

The Maldives might not be there next October if you keep heating your water.
Listen to Greta, Daz. She wasn't even a year old when this thread was started, btw.

[NWH]

Yeah it’ll be there next year Daz don’t worry m8 enjoy beautiful place what island are you going to.

[Granny]

How many times have we been through this topic?
Even revived from the grave
I think some on here would have an argument in an empty room and fall out with their own shadow!