Moss and algae on roof surfaces retain moisture against tile and mortar, accelerating deterioration far beyond the cosmetic problem it appears to be. Biocide treatment and physical clearance protects the roof covering and prevents the premature mortar failure that untreated moss causes.
Moss growth rates vary significantly across the Chichester area. Harbour-adjacent and valley-floor properties with high ambient humidity and north-facing slopes accumulate moss faster than exposed coastal plain properties. The treatment specification and clearance interval we recommend is based on the specific conditions at your property, not a one-size-fits-all schedule.
Moss acts as a moisture sponge against tile and mortar surfaces, retaining damp contact that accelerates freeze-thaw mortar degradation in winter and drives biological organisms into joints year-round. The damage is not visible until mortar fails or tiles spall — by which point the moss has been working for years. Biocide treatment kills the growth at root level; physical clearance removes accumulation from valleys and gutters where blockage causes immediate drainage problems.
We do not pressure wash roofs. High-pressure water on clay plain tiles, concrete interlocking tiles or any mortar joint forces water under tiles and into the roof structure, damages surface coatings, and removes the protective patina on period clay tiles. Professional biocide treatment kills moss without damaging tile surfaces. Any contractor recommending pressure washing on a period property is giving poor advice.
In most of the Chichester area, biocide treatment provides 3 to 5 years of protection on well-exposed pitches. Properties with significant tree shade or in high-humidity harbour-adjacent locations may need retreatment at the lower end of that range. We assess the expected interval at the survey based on your property's specific exposure and shade conditions.
Free survey — no call-out fee — Selsey & surrounding area
📞 01243 278085Selsey bill peninsula tip, three-sided sea exposure, highest emergency call rate. For roof moss removal in Selsey, this means full mechanical fixing throughout all re-roofing, bungalow stock at nail sickness threshold. We factor this into our survey, specification and material choice on every Selsey job — not as an afterthought but as the starting point for getting the work right.
"Excellent moss treatment and valley clearance. Free survey, clear quote, arrived on time and cleaned up completely. Exactly what you want."
"Used them for biocide treatment on victorian terrace. Honest assessment, matched materials perfectly, no pressure on scope. Very happy with the result."
"Called for annual maintenance visit with gutter check after another contractor let me down. Professional from first call to completion. Recommend unreservedly."
Selsey bill is the most southerly point of west sussex and the most exposed location in the entire coverage area, with three sides of the peninsula facing open sea. For roofing work in Selsey, this means We carry out more post-storm emergency call-outs per property in Selsey than anywhere else we cover — full mechanical fixing throughout all re-roofing is non-negotiable. Predominantly bungalow and low-pitch 1950s to 1970s stock now at nail sickness threshold. We factor all of this into our survey, specification and material choice on every Selsey job.
The repeat call pattern from Selsey — post-storm emergency leading to temporary make-safe, then permanent repair, then a year or two later repeat from a different pitch — is one we know from experience. A proper conversation at the survey about full replacement versus continued repair saves Selsey homeowners money over the medium term. We have it honestly.
Free survey across all Chichester postcodes and the surrounding area. Written quote with full itemised breakdown. No call-out fee, no obligation, and no pressure to commit before you are ready. We have been carrying out this work in Chichester and the surrounding area for over 20 years. Our reputation here is built on honest assessment and correct specification — not on selling work that is not needed. Call 01243 278085 to arrange a free survey.
Costs vary by scope and access. Biocide Treatment: £200–£500. Treatment + Valley Clear: £300–£650. We provide a free survey and written itemised quote for all work in Selsey — no obligation to proceed.
Yes. Selsey is part of our regular working territory. We carry out roof moss removal across all Selsey postcodes and the surrounding area. Our own team on every job — no subcontractors.
No. The survey visit and quote are free with no obligation. For emergency work, we charge only for the make-safe and repair — no separate call-out fee on top.
Minor repair or maintenance visits typically take 2 to 4 hours. Larger jobs — re-roofing, full flat roof replacement — take 3 to 7 days depending on size and complexity. We confirm the programme in the written quote.
Scaffold requirements depend on the job and property height. We confirm access requirements in the written quote. Scaffold cost is always included as a line item so there are no surprises.
Yes. Selsey bill peninsula tip, three-sided sea exposure, highest emergency call rate. For roof moss removal this means full mechanical fixing throughout all re-roofing, bungalow stock at nail sickness threshold. We specify materials and methods appropriate to Selsey's specific conditions at the survey.
Yes. Our NFRC membership is current and verifiable at nfrc.co.uk. We hold £5m public liability insurance and provide a written 10-year workmanship guarantee on all roof moss removal in Selsey. All credentials available on request.
We apply a professional biocide treatment to all affected pitches — not just the areas with visible heavy coverage. The biocide kills the biological growth at root level, not just the visible surface. Over the following 4 to 8 weeks the treated material dies, bleaches and begins to wash off naturally in rain. We physically clear valleys, gutters and any areas where accumulated moss is causing immediate drainage problems on the same visit. We do not pressure wash — high-pressure water forces moisture under tiles, damages surface coatings and removes the protective patina on period clay tiles. Any contractor recommending pressure washing on a Selsey period property is giving you poor advice.
Moss growth in Selsey is influenced by the most exposed coastal location with three-sided sea exposure. North-facing pitches accumulate moss fastest wherever they occur — the reduced UV and persistent shade create ideal conditions. Properties with mature trees overhanging the roof see the fastest regrowth rates regardless of initial treatment quality. We assess the specific growth conditions at your property at the survey and advise on the expected retreatment interval — which in high-growth locations in Selsey may be as short as 3 years rather than the 4 to 5 year interval appropriate for well-exposed pitches.
Biocide treatment on a standard semi-detached in Selsey typically costs £200 to £400. Larger properties or those with particularly heavy coverage run £400 to £600. Valley clearing is included where needed. Annual maintenance contracts combining treatment, clearance and a condition check are available from £150 per year — the most cost-effective way to manage moss on Selsey properties where regrowth is consistent.
Honest pricing from a local Chichester roofer. Free survey, written quote, no obligation in Selsey.
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