Moss has always been prevalent in rural areas but since the Clean Air Act our town and cities are becoming greener with less pollutants such as sulfur dioxide, making our rain less acidic. This is great news for the environment but also great conditions for the growth of moss. Moss on roofs left unattended can over time block gutters and drainage, if your gutters are overflowing this can cause water damage to both your walls and footings with both damp and subsidence. As well as this, the moss on your roof retains water keeping roof tiles saturated and leading to damage through freezing. 

The method we use to clean roofs is 'scraping', we scrape the roof with profiled blades that match your tiles profile and wire brushes on telescopic poles. This means we can work from the ground or scaffold tower without the risk of damage from stepping on the roof, removing the majority of the visible moss and clearing the gutters out ready for biocide treatment. We don't offer other roof cleaning services such as pressure washing or steam cleaning because a lot of tile manufactures don't recommend the use of pressure and heat. Although they can provide instant aesthetic results immediately, more damage can be done shorting the life expectancy of the roof tiles and damage as well as causing a lot of mess as far as neighborouging properties.

After scraping the majority of the moss away you are left with the stubborn embedded roots, cells and bacteria. We then treat this with a biocide using a telescopic brush, this kills off the remaining roots, algae and lichens. Over the coming months the roof will improve in appearance as the weather washes the dead debris away.  If the roof wasn't treated the moss growth would be back within a matter of months. The biocide also helps prevent future growth keeping the roof clearer for longer. How long it lasts is impossible to say, however we would hope for an average of 2-5 years depending on the properties environment, roof type, pitch etc.

Please view our City of Guilds accredited qualification PA1 & PA6A which allows us to apply professional grade biocide to your roof.

 https://www.credly.com/users/nicholas-whitewood-moores

If caught before the scraping process is needed it reduces the scale and cost of the job, only requiring a treatment of biocide. So it can be more cost effective to keep on top of the maintenance before it gets the chance to grow.

Depending on the scale of the contamination you may find that once the debris have washed away, you may require an additional gutter clean, but this isn't always necessary and why we don't offer it included as standard, however should you require one within 6 months of a roof clean we would provide this at a discounted rate.