Roof moss cleaning cost
Discussion
I had a quote of £2100 to clean an extended end of terrace, 2 days of work for 2 using mobile scaffolding, including prevention treatment and cleaning of soffits and window ledges. Located in London.
It seems on the expensive side, however as the roof hasn't been cleaned for >25 years it's not a big cost per year. Does anyone have any comparable cost or experience? Ta
It seems on the expensive side, however as the roof hasn't been cleaned for >25 years it's not a big cost per year. Does anyone have any comparable cost or experience? Ta
Whoozit said:
I had a quote of £2100 to clean an extended end of terrace, 2 days of work for 2 using mobile scaffolding, including prevention treatment and cleaning of soffits and window ledges. Located in London.
It seems on the expensive side, however as the roof hasn't been cleaned for >25 years it's not a big cost per year. Does anyone have any comparable cost or experience? Ta
For that sort of money I’d be inclined to buy a tower scaffold and do it myself.It seems on the expensive side, however as the roof hasn't been cleaned for >25 years it's not a big cost per year. Does anyone have any comparable cost or experience? Ta
I looked into this carefully last year. Various companies offer different processes - jet washing, other washing devices, scraping and compressed air blowing. Some are good trades-people and some are rogues. All offer noxious chemicals to (a) treat residual moss and (b) hopefully prevent it for a while. It is perhaps inevitable that moss will re accumulate with time but while present it will potentially damage your tiles and removing it improves the appearance of the house.
London prices are going to be more and the scaffolding will add extra cost (some use cherry pickers) so I don't think the price quoted is out of range particularly if there is any sort of guarantee (and you think the company will still be operating in a few years time). Things to watch for are the care of any plants etc at ground level and care and cleaning of your guttering. Get multiple quotes!
London prices are going to be more and the scaffolding will add extra cost (some use cherry pickers) so I don't think the price quoted is out of range particularly if there is any sort of guarantee (and you think the company will still be operating in a few years time). Things to watch for are the care of any plants etc at ground level and care and cleaning of your guttering. Get multiple quotes!
This is something that I have had to do on a major moss scale!
Our new place had moss covered tiles everywhere, the handmade clay tiles were paper thin in the worst sections. The moss had eaten them away over the years. We knew it was going to be a lot of work, and in the end replaced about 8000 tiles, and a new flat roof. Few pictures
You can see them mid clean on this image, in the distance you can make out the boom.

Picture of cleaned up roof ( that red patch of tiles needed blending in) and massive aerial that's been removed!

Total transformation of the house. The company I used cover London and were fantastic to deal with.
Cost us just under 5k with biocide treatment after
Our new place had moss covered tiles everywhere, the handmade clay tiles were paper thin in the worst sections. The moss had eaten them away over the years. We knew it was going to be a lot of work, and in the end replaced about 8000 tiles, and a new flat roof. Few pictures
You can see them mid clean on this image, in the distance you can make out the boom.
Picture of cleaned up roof ( that red patch of tiles needed blending in) and massive aerial that's been removed!
Total transformation of the house. The company I used cover London and were fantastic to deal with.
Cost us just under 5k with biocide treatment after
James_P said:
This is something that I have had to do on a major moss scale!
Our new place had moss covered tiles everywhere, the handmade clay tiles were paper thin in the worst sections. The moss had eaten them away over the years. We knew it was going to be a lot of work, and in the end replaced about 8000 tiles, and a new flat roof. Few pictures
You can see them mid clean on this image, in the distance you can make out the boom.

Picture of cleaned up roof ( that red patch of tiles needed blending in) and massive aerial that's been removed!

Total transformation of the house. The company I used cover London and were fantastic to deal with.
Cost us just under 5k with biocide treatment after
Am i misreading that, or did you really get 8000 tiles, labour to fit them, and a flat roof removed and replaced for £5000? Seems remarkably cheap Our new place had moss covered tiles everywhere, the handmade clay tiles were paper thin in the worst sections. The moss had eaten them away over the years. We knew it was going to be a lot of work, and in the end replaced about 8000 tiles, and a new flat roof. Few pictures
You can see them mid clean on this image, in the distance you can make out the boom.
Picture of cleaned up roof ( that red patch of tiles needed blending in) and massive aerial that's been removed!
Total transformation of the house. The company I used cover London and were fantastic to deal with.
Cost us just under 5k with biocide treatment after
forget the cowboys
only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
Edited by Purosangue on Wednesday 2nd July 22:41
There seem to be increasing numbers of people now advertising this recently.
Was driving through local village recently and saw someone having it done. Three blokes up on the roof, wandering around with no scaffolding, fall protection, or weight spreading… bit they’d done looked clean but did wonder how much damage had been done.
Was driving through local village recently and saw someone having it done. Three blokes up on the roof, wandering around with no scaffolding, fall protection, or weight spreading… bit they’d done looked clean but did wonder how much damage had been done.
Purosangue said:
forget the cowboys
only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
That method is now illegal.only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
Edited by Purosangue on Wednesday 2nd July 22:41
Moss has been classified as a plant and mechanical removal is first,scrape or wash,then biocide(never SH)..You don’t wash off biocide,that’s the point of it.
For a pro to clean a roof,one that has had training,carries out risk assessments and folllows coshh,it’s about £10/msq.
smifffymoto said:
Purosangue said:
forget the cowboys
only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
That method is now illegal.only way to pressure wash a roof without causing degradation or excessive wear to the roof tiles
Use a Biocide/ Hypochlorite solution spray on and leave overnight
day 2 wash with pressure washer remove all moss debris ,
day 3 tape up all soffits / facias . us an airless sprayer apply renotec coloured coating or a clear coat then get 20 years moss free with tiles as new
work guaranteed
https://www.renotecroof.com/roof-coating/
not cheap average 4 bed 4-5k but your only going to do it once
Edited by Purosangue on Wednesday 2nd July 22:41
Moss has been classified as a plant and mechanical removal is first,scrape or wash,then biocide(never SH)..You don t wash off biocide,that s the point of it.
For a pro to clean a roof,one that has had training,carries out risk assessments and folllows coshh,it s about £10/msq.
From HSE
A product is only within the scope of BPR if its intended use is to control harmful organisms by chemical or biological means.
as long as you comply with COSHH , using a Hypochlorite solution on a roof and washing off is no different to washing a driveway or a swimming pool
The point is if you power wash a cement tiles surface , you will reduce the life expectancy of the tile , by adding a coating that repels dirt , water it creates a barrier on the tile , effectively adding around 20 years to the roof.
The reason you wash off is to apply the top coat , you are Cleaning the roof to prep it unlike companies who leave a biocide on , which never works applying a superhydrophobic coating is about 95% effective stopping growth in the first place
Byker28i said:
hidetheelephants said:
Non-job makework to extract money from the gullible, leave the moss alone and keep your money in your pocket.
We lived down a high street, with moss falling from roofs onto the pavement. Much neater to remove it all and also stop the gutters cloggingGassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff