Harpenden · AL5
Roof cleaning and moss removal in Harpenden
Steep plain-tile roofs under the big trees around the Common grow thick moss on north slopes. Clay tiles tolerate soft washing well but never high pressure, which cracks old handmade tiles and lifts the nibs.
Free photographed survey
Every slope, chimney and gutter photographed.
Report yours to keep
Whether you hire us or not.
Agreed in writing
Scope fixed before any work starts.
One point of contact
Your survey and every follow-up handled by one person, 8am–6pm.
What should Harpenden homeowners know?
The roads off the Common and around the station are full of large Edwardian and Arts and Crafts houses with steep plain-tile roofs, tile-hung gables, bonnet hips and tall chimneys. Interwar detached houses fill the west side towards Kinsbourne Green, and Batford and Southdown mix Victorian cottages with later infill. Many homes have flat-roofed rear extensions and dormers added since.
What goes wrong on Harpenden roofs?
Bonnet hips and mortar. Bonnet hips are bedded in mortar that cracks with frost. Loose hip tiles on a steep plain-tile roof are a common Harpenden call.
Tile-hung gables. Vertical tile hanging loses nails over time and tiles slide out, usually after a windy spell.
Dormer and extension junctions. Where newer flat roofs meet old plain-tile roofs, the leadwork and upstands are the weak point.
How do we do roof cleaning and moss removal?
We remove moss by hand, soft wash the roof at low pressure and apply an HSE-registered professional biocide, exactly as its label directs. We do not pressure wash tiled or slate roofs. It strips the surface off concrete tiles and brings moss back faster, and on slate it drives water under the laps.
Full details on our roof cleaning and moss removal page.
Our process
What you get
- 01
Hand removal
Moss scraped off by hand, working down the roof without walking on fragile tiles.
- 02
Soft wash
Low pressure only, so the tile surface and the laps are untouched.
- 03
Biocide
Kills moss, algae and lichen on contact; the dead growth then weathers away over the following weeks and months.
- 04
Gutters and photos
Gutters cleared of debris and the roof photographed: any slipped tiles noted.
Questions
Roof cleaning and moss removal in Harpenden: FAQs
Can you match the handmade clay tiles on my Edwardian house?
Usually, from reclaimed stock. We bring samples so you can see the colour and camber before they go on.
My bonnet hips keep coming loose. Should I switch to a dry hip?
In the conservation area, mortar-bedded bonnet hips suit the house and are usually expected. Outside it, a dry hip can be an option. We explain both.
Roof cleaning and moss removal nearby
Free · Photographed · No pressure
Get a quote in Harpenden.
Get a quote for your roofing work. Where an inspection is needed, we photograph the roof, explain our findings in plain English and give you the report to keep.