A Detailed Look at Roof Cleaning and Coating Prices

How much does it typically cost to instruct a roofing or cleaning firm to go up on the roof and either remove the moss by hand or give the roof a jet clean? Also, what is a fair price to coat or seal the tiles after the cleaning work is completed?

On this page, you will see the going rate for:

  1. A manual clean using scrapers and brushes to remove moss
  2. A jet clean with a power washer machine
  3. A separate price to apply a waterproof sealer to the tiles

Roof coating applied to roof tiles

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1) Price to Remove Roof Moss by Hand

This is what the work involves:

  • Erect access equipment to roof height, this usually compromises of an access tower and use of safety harnesses and ridge ladder.
  • Cover garden with plastic sheets.
  • Remove all the moss growing on the tiles by scraping it off.
  • Sweep over the tiles to remove any dust or small particles.
  • Inspect roof and replace any damaged tiles.
  • Inspect cement to the roof and make good any repairs as needed.
  • Clear out the gutters and check the rainwater downpipes, unblock as required.
  • Apply one coat of moss treatment.
  • Remove access equipment and take away all waste.
Terraced house£600 inc vat
Semi detached£900 inc vat
Small detached w/garage£1200 inc vat
Large detached w/ porch and garage£1400 inc vat

2) Cost to Jet Wash the Roof

This work entails:

  • Access equipment to work height.
  • Check roof for any damaged or broken tiles and replace as needed.
  • Disconnect gutters and cover garden with plastic sheets.
  • Jet wash the roof starting at the highest point and working downwards.
  • Clear out gutters and reconnect to pipes after clearing them out too.
  • Inspect roof cement and carry out repairs as needed.
  • Apply one coat of moss killing chemical after the roof has dried.
  • Remove access equipment, clean windows as needed and remove all waste.
Terraced house£600 inc vat
Semi detached£800 inc vat
Small detached w/garage£1000 inc vat
Large detached w/ porch and garage£1100 inc vat

3) Jet Roof Then Apply Roof Sealant or Coloured Coating

Coating or sealing should only be carried out on a roof that has been recently jet cleaned.

This is to ensure that any pollutants and algae are also removed and the tiles are ready to be painted/coated.

The prices in the table below, therefore include jet washing:

  • Ensure tiles are dry.
  • Cover surrounding area with plastic sheets.
  • Brush over the roof to remove dust.
  • Paint tiles with either a coloured coating or translucent sealant to the roof edges by hand.
  • Apply coating/sealant by sprayer to remaining roof tiles.
  • Allow to dry and apply a second coat.
  • Remove plastic sheets.
Terraced house£1200 inc vat
Semi detached£1750 inc vat
Small detached w/garage£2000 inc vat
Large detached w/ porch and garage£2500+ inc vat

The price above INCLUDES a roof clean by jet washing.

Price Breakdown

The bar chart above shows where your money goes, we assume that the two-day project involves cleaning and coating a typical 3-bedroom property ta total cost of £1750.00.

How Long Does it Take to Complete the Work?

ClockThis depends on many workers are on the project. A team of two will complete more work than a single person working alone.

The weather also affects the timescale. In winter there are fewer daylight hours and more rain which could delay the work.

Removing moss by hand with a scraper and brush is generally a slow process, so for a typical 3-bedroom house expect the work to take two days at most.

Jet washing can be done in less time so expect the work to take one day.

The coating or sealant is usually applied on another day after the roof has had a chance to dry out.

How Long Until the Moss Grows Back?

This depends on how much sunlight hits the roof.

For north facing roofs – 2-3 years if the moss is removed manually and 4-5 years if it’s power washed and coated with a sealant.

For south facing roofs expect moss to take longer to grow back due to the extra sunlight, perhaps an additional year or two.

What Type of Company Does This Work?

There are specialist roof cleaning companies that do this work.

Also, for manual moss removal, any roofing company will be able to undertake this work.

If you want the roof jet washed and a sealant or coating applied then we recommend a specialist company as they will have the correct spraying equipment for the paint.

Get a Price Online

We have done our best to break down the costs involved with roof cleaning and coating and provided some sample quotes.

To arrange your own price for your roof, hit the link below and see how we can help:

Get a Quote Online


The roof provides a perfect place for moss to grow as it get wet frequently and the rough surface materials allow algae and moss to grip the tiles. Overhanging trees and chimneys create shaded areas where moss tends to flourish before spreading to the rest of the roof.

We are trades people ourselves and have plenty of experience in the home improvement sector.

The prices you see on jobprices.co.uk are based on our intricate knowledge of roofing projects like this.

We have done our best to explain the costs involved with this type of work, we display the cost of things like materials, waste disposal, labour, vat and even estimate the profit margins a company would be looking to make.

Obviously, every business is different and the prices you receive may vary to ours, but you can use our website as a rough guide.

Roofing companies and specialist roof cleaners usually erect their own access equipment. Aluminium access towers can provide safe access to the roof in most circumstances. Roof ladders and harnesses can also be used

On some houses it is necessary to use a professional scaffold company as they can go higher, bridge over conservatories and extensions and also place scaffold above public footpaths.

This would obviously add additional cost above what we have quoted.

See our separate guide to scaffold prices here

Below you can find a link to our recently updated trade day rates page:

Day Rates For Tradespeople