Moss and biological growth on Peacehaven roofs is accelerated by local conditions. We use low-pressure soft washing with professional biocide — safe for tiles, mortar and lead. No high-pressure damage.
Concrete tile at 80-100 years old is the dominant problem — carbonation means tiles crumble at the edges and nibs. Moss growth on Peacehaven roofs is faster than most inland areas due to local conditions. Cliff-top grid town with no natural shelter from south or south-west. The grid street layout creates wind tunnelling — south-facing gardens and roof slopes receive full Channel blast. Temperature extremes are higher than sheltered valley towns: hot in summer heat, exposed in winter gales. Soft-wash treatment kills moss at the root and includes a post-treatment biocide to prevent regrowth for 3-5 years.
High-pressure washing is the fastest method but also the most damaging. It forces water under tiles, dislodges mortar on ridges and hips, fractures the surface of older concrete tiles, and strips the protective patina from lead. On Peacehaven's older properties — particularly the Grid-pattern inter-war planned town developed from the 1920s. — this can cause more damage than the moss itself.
Low-pressure application of professional biocide solution to all biological growth. Dwell time of 15-30 minutes. Low-pressure rinse to remove dead growth — no mechanical stress on tiles or mortar. Post-treatment biocide application to bare surfaces to prevent regrowth. Written roof condition report on completion.
Cliff-top grid town with no natural shelter from south or south-west. The grid street layout creates wind tunnelling — south-facing gardens and roof slopes receive full Channel blast. Temperature extremes are higher than sheltered valley towns: hot in summer heat, exposed in winter gales. On the most exposed north-facing slopes in Peacehaven, biocide treatment typically needs renewing every 3-4 years. South-facing slopes with good drainage need treatment every 5-6 years. We advise on a realistic maintenance schedule during the free survey.
| Single slope treatment | £150 - £300 |
| Full terraced property | £300 - £600 |
| Full semi-detached | £400 - £800 |
| Biocide post-treatment (prevention) | Included |
| Roof condition report | Included |
“North-facing slope was black with moss. Treated professionally and it looks like a different roof. The condition report flagged two tiles I wasn't aware of — they fixed those at the same time.”
“Previous roofer had high-pressure washed and cracked two tiles. These used soft wash, no damage, thorough result.”
“Had the roof treated and biocide applied. Two years later and there's no sign of regrowth. Worth every penny.”
Grid-pattern inter-war planned town from the 1920s. Uniform semi-detached and detached properties with concrete tile now 70-100 years old. Concrete interlocking tile at 80-100 years old showing widespread carbonation and nail sickness. The combination of both failure modes simultaneously is unique to this era of stock..
Cliff-top grid town with no natural shelter. Grid street layout creates wind tunnelling. Maximum Channel exposure on south-facing slopes..
Concrete tile at 80-100 years old is beyond the design life of the material. Carbonation means tiles crumble at the edges. Many Peacehaven roofs are held together only by ridge and hip mortar..
Pricing note: For Peacehaven properties built before 1950, re-roofing is almost always more cost-effective than repair over any 10-year horizon..
Every job follows the same clear process — no surprises, no hidden costs, full communication throughout.
We assess moss coverage, identify any underlying tile or mortar issues that the treatment will expose, and quote for the cleaning and post-treatment.
Professional biocide solution applied at low pressure to all biological growth. Dwell time allows the biocide to penetrate and kill growth at the root.
Dead growth rinsed clear at low pressure — no mechanical stress on tiles or mortar. Valleys and gutters cleared of all shed debris during the cleaning process.
Post-treatment biocide applied to bare surfaces to prevent regrowth for 3-5 years. More durable than the pre-rinse application alone.
Every moss removal job includes a written condition report documenting tile, mortar, lead and guttering condition found during the cleaning process.
A full property soft-wash treatment in Peacehaven costs £300-£800 depending on roof size and access. Single slope treatments start from £150. All treatments include post-treatment biocide and a written roof condition report.
Soft-wash treatment is safe for all tile types including clay, concrete, slate and fibreglass. We do not use high-pressure washing which can fracture older tiles and dislodge mortar.
Biocide treatment prevents significant regrowth for 3-5 years on most Peacehaven properties. North-facing slopes and properties near trees may need retreatment after 3 years. South-facing slopes with good drainage typically last 5-6 years between treatments.
Moss retains moisture against tile surfaces, accelerating frost damage and tile deterioration. It blocks valleys and gutters, causing overflow and potential water ingress. In Peacehaven's conditions moss grows faster than inland — it warrants periodic treatment rather than waiting for visible damage.
Consumer biocide products are available but less effective than professional-grade solutions. Application without access equipment risks injury. The roof condition report included with professional treatment is also valuable — often the first indication of issues that would otherwise go unnoticed.
Yes. Every moss removal treatment includes clearing all valleys and guttering of debris shed during the cleaning process. We leave the drainage system clear on completion.
We cover Peacehaven and the surrounding area. Call 01273 973 996 to arrange a free quote.
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