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Roof Cleaning Specialists

Roof Cleaning
Knocklyon

Moss removal, soft washing and biocide treatment across Knocklyon. Extends roof life and restores appearance.

Free Roof
Inspection
No Call-Out
Charge
Fully
Insured
Emergency
Repairs
25+ Years
Experience
Fully InsuredPublic & Employer
SafePassCertified Team
24/7Emergency Line
★★★★★ 5 Star Reviews on Google

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25+Years Experience
1,000+Roofs Repaired
5 ★5 Star Reviews
100%Customer Satisfaction
LocalRoofers You Can Trust

For roof cleaning in Knocklyon, Peak Roofing provides expert, fully insured service. Moss, lichen and algae growth on tiles and slates traps moisture against the roof surface, accelerating mortar erosion and eventually the tiles themselves. Our roof cleaning specialists use low-pressure soft washing combined with a professional biocide treatment throughout Knocklyon — far safer and more effective than high-pressure jet washing, which cracks tiles, displaces ridge mortar and forces water under the overlap. A professionally cleaned and biocide-treated roof in Knocklyon stays clear for significantly longer and reduces the frost damage risk that comes with moisture trapped in moss growth. Free assessment, written quote, no call-out charge.

Knocklyon is a well-established south-west Dublin suburb built predominantly in the 1980s, with a close-knit community feel and a range of residential estates on elevated ground between Rathfarnham and the M50. Properties in Knocklyon are predominantly 1980s semi-detached and detached estate houses, some 1990s townhouse developments, and a small number of bungalows on the higher roads. Common roof issues we address here include concrete tile deterioration and ridge tile repointing on 1980s stock, felt underlay deterioration on properties now exceeding 40 years, flat roofs failing on garage and extension roofs, and fascia and soffit replacement, making professional roofing maintenance essential for Knocklyon properties. Our roofers understand the construction methods and typical materials used in Knocklyon — every inspection is free and every job begins with a written quote.

Areas we cover in Knocklyon: Knocklyon Road, Scholarstown Road, Whitechurch Road, The Oaks estate, Kiltipper Road, Whitehall Road West and Ballyboden Road

View all Roof Cleaning areas we cover →

Our Roofing Services

Recent Roofing Work in Knocklyon

Before
After
Case Study
Ridge Tile Repointing – Knocklyon Road
What we did
Repointed all ridge tiles and replaced six cracked ridge tiles on 1985 semi-detached estate house
Duration1 Day
Typical Cost€350 – €550
Photos coming soon
Case Study
Extension Flat Roof – Scholarstown Road
What we did
Replaced failed felt flat roof with new EPDM rubber membrane on rear single-storey extension
Duration1 Day
Typical Cost€4,500 – €6,500
Photos coming soon
Case Study
Fascia & Soffit – The Oaks
What we did
Full UPVC fascia, soffit and guttering replacement on 1980s detached house in The Oaks estate
Duration1 Day
Typical Cost€2,900 – €3,200

Why Knocklyon Homeowners
Choose Peak Roofing

  • Local, family run roofing company
  • Honest advice — no unnecessary replacements
  • Detailed roof inspection reports with photos
  • High quality materials & expert workmanship
  • Clean, tidy & respectful on every job
  • Fully insured for your peace of mind
  • Up to 25-year guarantee available
5 Star Reviews
"Excellent work from start to finish. I had other roofers quote and all felt the plywood was still good. James was 100% correct it had to go and be replaced. I also really liked that they supplied so many photos and vids to show the quality of the work. Gave me great assurance."
– Nick Walsh

We Provide

  • Free Quotes
  • No Call-Out Charge
  • Written Quotations
  • Work Guaranteed
  • Emergency Callouts

Frequently Asked Questions

From €700 — most properties completed in half a day. Free inspection first, so you know exactly what's involved before agreeing to anything.
Soft washing is the correct method. High-pressure jet washing can crack and dislodge tiles, wash away ridge mortar bedding, and force water under the tile overlap — causing internal damp that may not appear for months. Our soft washing process uses low pressure combined with a professional biocide solution that kills moss, lichen and algae at the root, leaving a clean roof that stays clean for 3–5 years after treatment.
Yes. Moss retains water against the tile surface and mortar joints, accelerating frost damage, mortar erosion and tile cracking. Removing moss and applying a biocide treatment removes that moisture trap and significantly slows future deterioration. For concrete tile roofs in Knocklyon, regular cleaning every 4–6 years is a cost-effective maintenance strategy that delays the need for full roof replacement.
A standard semi-detached roof in Knocklyon typically takes half a day to a full day depending on pitch, size and the extent of moss growth. Treatment solution is applied after cleaning and continues to work for several months after the visit. There is no need for you to vacate the property and access is via roof ladder — we do not require scaffolding for most residential jobs in Knocklyon.
Yes. We frequently combine roof cleaning with repair work — replacing cracked or broken tiles, repointing ridge sections, clearing gutters and downpipes — on the same visit. This is the most cost-effective approach and avoids a second attendance fee. We will identify any repair work needed during our free assessment of your Knocklyon property and include it in the same written quote.
In Knocklyon, the roofing problems we see most often are concrete tile deterioration and ridge tile repointing on 1980s stock, felt underlay deterioration on properties now exceeding 40 years, flat roofs failing on garage and extension roofs, and fascia and soffit replacement. A free inspection is the best way to check whether any of these apply to your roof — call 085 782 8222 to arrange one.
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Areas We Cover

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Need Emergency Roof Repairs?

We're available 24/7 for emergency callouts across Knocklyon and the surrounding area. Based just 9km away in Sandyford.

085 782 8222 24/7 Emergency Line
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Get a Bird's-Eye View of Your Roof

Our drone surveys deliver high-resolution footage of every tile, ridge and chimney — no scaffold, no ladders, no disruption. Ideal for insurance claims, pre-purchase inspections and hard-to-access roof sections.

Book a Drone Survey  →
Book Your Free Roof Cleaning Assessment Today Get a free roof inspection and honest advice from your local roofing experts.