Roofing
Roof cleaning and moss removal
Cleared by hand and treated, never pressure washed.
Moss holds water against your tiles, blocks gutters and valleys, and drops down into the downpipes. Clearing it is worth doing. Blasting it off with a pressure washer is not, and it is how a lot of roofs get wrecked by someone who meant well.
What the work involves
Hand scraping
Moss removed by hand from the tiles and the laps. Slower than a pressure washer and it does not strip the surface off your tiles or force water under the covering.
Gutter, valley and downpipe clearing
Everything the moss has dropped into gets cleared out and flushed through, because that is usually where the actual damage was coming from.
Biocide treatment
An applied treatment that kills off remaining spores and slows regrowth. It works over the following weeks rather than instantly.
Inspection while we are up there
Moss hides slipped and cracked tiles. Once the roof is clear we can see it properly, and we will tell you what we found.
Why we do not pressure wash
High pressure water strips the protective surface off concrete tiles, which makes them absorb water and grow moss back faster. It also drives water up under the laps and into the roof space. A roof that has been pressure washed often looks excellent for a year and then deteriorates quickly. We clear by hand instead.
Frequently asked questions
Does moss actually damage a roof?
Indirectly, yes. It holds moisture against the tiles, it lifts the laps as it grows into them, and it blocks gutters and valleys so water backs up under the covering. The moss is not the enemy so much as the water it traps.
Why not pressure wash it? It looks better afterwards.
Because it takes the surface off the tiles and forces water under the laps. The roof looks great for a season, absorbs more water afterwards, and the moss comes back faster than before. We clear by hand.
How often does it need doing?
Every few years on a shaded or north facing roof, less often on an exposed one. Clearing the gutters is worth doing more regularly than clearing the tiles.
Will the moss come back?
Eventually, yes, on most roofs in this part of the country. The biocide treatment slows it down considerably but nothing stops it for good.
Recent work
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