Moss on your Perth roof? We treat, remove and prevent regrowth using the correct biocide process — no pressure washing, no tile damage. Covering all of Perthshire. Free no-obligation quotes.
Moss removal in Perth uses professional biocide treatment, not pressure washing, costing £150–£300 for a semi or £300–£600 with a zinc ridge strip to prevent regrowth. Perth Roofing Experts treats moss and lichen correctly and clears gutters. NFRC-registered with free quotes across Perthshire. Call 01738 245 298.
Moss is heaviest on Perth's north-facing and tree-shaded roofs. Here is when it needs treating — and when it is best left alone.
When it is not the answer: Pressure-washing a tiled roof is never recommended — it strips the tile surface and drives water under the laps. Soft-wash and biocide only, and only where moss is genuinely causing a problem. Read the full guide.
Scotland's combination of high annual rainfall, persistent cloud cover, and relatively mild winters creates near-ideal conditions for moss and lichen to establish on any roof surface. In the Tay valley, the additional humidity from the river and surrounding woodland means moss colonisation rates are among the highest in central Scotland. North-facing slopes on properties in Craigie, Kinnoull, and the riverside streets of Perth can develop significant moss loading within 5–10 years of a new or treated roof.
The problem is not purely cosmetic. Heavy moss holds moisture against tile surfaces, accelerating freeze-thaw damage and gradually lifting tile edges. Moss accumulating in lead valleys and gutters causes blockages that lead to overflow and water ingress. On older roofs — particularly the Victorian and Edwardian slate properties on Glasgow Road and Dunkeld Road, and the concrete tile estates of Letham and Tulloch — significant moss growth often conceals underlying tile cracking and nail failure that has been developing for years.
The right approach has three stages. First, a biocide treatment is applied to the entire affected surface. This kills moss and lichen at the rhizome level, preventing rapid regrowth. We allow 4–8 weeks for full die-off in Perth's climate. Second, the dead material is removed by soft brush or controlled low-pressure wash — a significantly gentler process than pressure washing, safe for all tile types including fragile Victorian slate. Third, a zinc or copper strip is fitted at the ridge. Both metals leach ions in rainfall that inhibit moss growth across the slope below, significantly extending the interval before the next treatment is required.
We do not pressure wash roofs. It forces water under tile laps, dislodges weakened slates, damages ridge mortar beds, and leaves moss rhizomes intact for rapid regrowth. Any contractor offering immediate pressure washing as their primary moss removal method is not using best practice. Call 01738 245 298 for a free assessment and honest advice on the right treatment for your property.
We attend, inspect inside and out, and trace the fault to its true source — rarely directly above the ceiling stain.
You get a clear price for the repair before any work starts, with the scope explained plainly and no call-out fee.
We complete the repair using matching materials, from safe access appropriate to your property.
We check the work, clear any debris, and back the repair with our written workmanship guarantee.
| Job | Typical duration |
|---|---|
| Slipped or cracked tiles | 1–2 hours |
| Flashing repair | 2–4 hours |
| Rear valley rebuild | 1–2 days |
| Leak trace & repair | Half a day |
Wet or high-wind days pause work at height — we build weather margin into every booking and put temporary weatherproofing on the same day if rain stops play.
Most Perth repairs run from towers or roof ladders; scaffold is quoted only where the job needs safe standing time. Scaffold is specified for: chimney-side repairs, full valley rebuilds, and anything beyond a day at height - always itemised in your written quote, never a hidden extra, and we arrange it.
Perth's tight city-centre closes and the terraced streets of Bridgend mean rear-access scaffold and permit-controlled pavement space; the open estates at Letham, Tulloch and Scone are more straightforward. Pavement scaffold and skip permits go through Perth & Kinross Council; allow a few working days on streets like Watergate, the Old High Street, George Street where space is tight.
| Job | Typical range | Notes |
|---|---|---|
| Manual removal + biocide (semi) | £400–£800 | Soft-wash, no pressure |
| Full clean (detached) | £600–£1,200 | Scope-dependent |
| Gutter clear add-on | £80–£150 | With the clean |
| Biocide treatment only | £250–£450 | Slows regrowth |
| Ridge / valley clear | Per scope | Where accessible |
Worked example: Manual soft-wash and biocide on a north-facing Letham semi with a gutter clear: about £550–£750.
No deposit on repairs under £500. On larger jobs and re-roofs, payment is staged with nothing due before materials are on site, and the balance only after you have inspected the finished work. Prices include VAT. We never ask for large cash sums up front.
Workmanship on the repaired section is covered for 10 years in writing; any replacement tiles or slates carry manufacturer warranties on top.
If a fault appears in covered work, we come back and put it right. No quibbling, no re-charge.
Free Moss Removal Quote — No Call-Out Fee
01738 245 298Every repair starts with a roof survey. From the ground we assess visible damage using binoculars where needed; for anything requiring closer inspection we go up on scaffold or a platform lift. We check the affected tiles or slates, the surrounding material for secondary failures, ridge and hip mortar condition, any lead or flashing adjacent to the repair zone, and the gutter condition directly below. You get a written report and itemised quote within 24 hours of the visit.
We specify materials to match the original specification wherever possible. For natural slate repairs this means sourcing Ballachulish, Welsh blue, or Spanish slate in the correct thickness and texture to avoid visual patchwork on prominent elevations. For concrete and clay tile repairs we source from the original manufacturer where the product is still in production, or identify the closest current match where it is not. We will not use undersized or mismatched material just because it is cheaper or faster to source.
All repair work is covered by a written workmanship guarantee. For lead work we additionally carry the manufacturer's material guarantee on the lead product itself. If a repair fails within the guarantee period for workmanship reasons, we return and correct it at no charge. This is standard practice for us — not a negotiating point.
In Perthshire the repair season runs year-round, but autumn and early winter produce the highest volume of calls. Freeze-thaw cycling through October and November opens up mortar joints and cracks flashings. Leaf fall blocks valleys and gutters, causing overflow that shows up as leaks in upstairs rooms. Spring reveals damage that has been developing under winter snow loading and ice. We prioritise emergency and structural repairs regardless of season; for aesthetic or non-urgent work we prefer dry conditions to ensure the best finish.
Free no-obligation quote across Perth and Perthshire — call 01738 245 298.
Based in Perth, covering a 25-mile radius across Perthshire, Kinross-shire and Stirlingshire.
Covering PH1, PH2 and surrounding postcodes.
A few hours of ladder work and a small amount of tile debris — we sheet below the work area and clear before we leave. You do not need to stay home for external work - we just need power and access agreed in advance.
Repairs run year-round; temporary weatherproofing goes on the same day if rain stops play. Sitting where the Tay and Earn valleys funnel south-westerly gales, Perth roofs take driven rain and wind uplift, and the Scottish freeze-thaw cycle opens up mortar and lead.
“North-facing back slope was completely green. Perth Roofing applied the biocide treatment, came back six weeks later to clear the dead moss and fitted a zinc strip at the ridge. Eighteen months on and no significant regrowth.”
“Had the whole roof done as part of a general inspection. They found two cracked tiles under the moss that I'd never have spotted. Both replaced at the same visit. Good value for the full package.”
“Victorian slate roof on Dunkeld Road with years of moss buildup. They treated it carefully without pressure washing, which I'd specifically asked to avoid. Thorough job and the slate is undamaged.”
Perth Roofing Experts has been carrying out work across Perth and Perthshire since 2004. Over two decades working on roofs in this region has built a detailed picture of what the local housing stock requires — the specific failure patterns of post-war concrete tile estates in Letham, Tulloch, and Muirton, the nail sickness endemic in 1960s developments across Crieff, Blairgowrie, and the satellite towns, the lead fatigue on Victorian properties in Kinnoull and Bridgend, and the harder Highland conditions in Crieff and Aberfeldy that demand different specifications from sheltered Perth city properties.
Our service area covers Perth city and an approximately 25-mile radius — taking in Scone, Kinross, Crieff, Dunblane, Bridge of Earn, Stanley, Auchterarder, Blairgowrie, Aberfeldy, Almondbank, and Methven, along with all surrounding villages. Each location has its own housing stock profile and its own roofing conditions. A contractor who works across this range routinely knows what to look for in each area in a way that an occasional visitor cannot replicate.
We carry out all work with our own team — no subcontracting. The surveyor who quotes is the same person responsible for delivery. Every job carries a written 10-year workmanship guarantee and NFRC registration. Call 01738 245 298 for a free no-obligation survey anywhere in our service area.
Moss treatment and removal on a standard semi-detached in Perth costs £200–£500 depending on the extent of growth and access requirements. Adding a zinc or copper ridge strip for long-term prevention costs an additional £100–£250. We provide free no-obligation quotes across the PH1 and PH2 areas.
No. Pressure washing forces water under tile laps, dislodges fragile slates and cracked tiles, and damages ridge mortar beds. It also does not kill moss at the rhizome level, so regrowth is rapid. The correct process is biocide treatment followed by soft brush or low-pressure removal once the moss has died.
A biocide treatment typically takes 4–8 weeks to kill moss and lichen fully across the treated surface. Removal of the dead material follows once the biocide has worked through. In the Tay valley climate with high humidity, we recommend a zinc or copper strip at the ridge after removal to inhibit regrowth.
In most Perth and Perthshire locations, a full moss treatment cycle every 3–5 years is appropriate. Properties near the Tay or in valley locations with heavy tree cover may need attention every 2–3 years. A zinc ridge strip significantly extends the interval between treatments.
Moss does not directly damage structurally sound tiles in the short term, but it holds moisture against the tile surface, accelerating freeze-thaw damage and lifting tile edges over time. Heavy moss loading in valleys and gutters causes blockages that lead to overflow and water ingress. On older roofs, moss growth often conceals underlying tile cracking and nail sickness.
Yes. We carry out roof moss treatment across Perth, Scone, Kinross, Crieff, Dunblane, Blairgowrie, Aberfeldy and all surrounding Perthshire locations. Call 01738 245 298 for a free quote.
Yes, and we recommend it. Moss removal reveals the underlying tile and slate surface, making it the ideal time for a condition inspection. We include a visual assessment with all moss treatment visits and flag any issues found at no extra charge.
No call-out fees. No obligation. An honest quote from a local Perth roofer who turns up when they say they will.
01738 245 298