Call Now WhatsApp
Roof Cleaning Specialists

Roof Cleaning
Castleknock

Moss removal, soft washing and biocide treatment across Castleknock. 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

Get Your Free
Roof Inspection

No Obligation • Fast Response
or
WhatsApp Us
25+Years Experience
1,000+Roofs Repaired
5 ★5 Star Reviews
100%Customer Satisfaction
LocalRoofers You Can Trust

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 Castleknock — 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 Castleknock 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.

Castleknock is an affluent north-west Dublin suburb with a semi-rural feel, characterised by large detached homes on mature wooded plots, quality 1980s and 1990s executive estates, and some modern new-build developments near the Phoenix Park. Properties in Castleknock are predominantly Large detached homes on mature plots along Castleknock Road, 1980s and 1990s executive semi-detached and detached estates, quality modern new-builds, and some period properties near the old village. Common roof issues we address here include natural slate deterioration on older prestige properties, lead valley failures on complex hipped rooflines, chimney repointing on larger homes, guttering blockages from mature deciduous trees, and moss accumulation on shaded north-facing pitches, making professional roofing maintenance essential for Castleknock properties. Our roofers understand the construction methods and typical materials used in Castleknock — every inspection is free and every job begins with a written quote.

Areas we cover in Castleknock: Castleknock Road, Carpenterstown Road, Auburn Avenue, Beechfield estate, Elmpark, Laurel Lodge and Carton Wood

View all Roof Cleaning areas we cover →

Our Roofing Services

Recent Roofing Work in Castleknock

Before
After
Case Study
Slate Restoration – Castleknock Road
What we did
Replaced 38 deteriorated natural slates and repointed all ridges and hips on large 1960s detached property
Duration2 Days
Typical Cost€900 – €1,200
Photos coming soon
Case Study
Lead Valley Replacement – Auburn Avenue
What we did
Replaced two failed lead valleys on complex hipped roofline of 1990s executive detached
Duration2 Days
Typical Cost€850 – €1,000
Photos coming soon
Case Study
Guttering Replacement – Laurel Lodge
What we did
Full UPVC guttering and downpipe replacement on large detached — persistently blocked by mature oak trees
Duration1 Day
Typical Cost€550 – €650

Why Castleknock 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
"James and team were amazing. A stellar job re-felting the roof and fixing storm damaged soffit, downspouts and flashing. We had a bereavement in the family the day before work was to commence and to keep the disruption to a minimum James sent 2 of his teams instead of one to get the entire job done in less than 4 hours, without dropping standards one bit. The roof and everything else looks immaculate."
– D Murphy

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 Castleknock, 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 Castleknock 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 Castleknock.
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 Castleknock property and include it in the same written quote.
In Castleknock, the roofing problems we see most often are natural slate deterioration on older prestige properties, lead valley failures on complex hipped rooflines, chimney repointing on larger homes, guttering blockages from mature deciduous trees, and moss accumulation on shaded north-facing pitches. A free inspection is the best way to check whether any of these apply to your roof — call 085 782 8222 to arrange one.
View All FAQs  →

Areas We Cover

Blanchardstown Palmerstown Lucan Clonsilla Mulhuddart Dunboyne
View All Areas  →

Need Emergency Roof Repairs?

We're available 24/7 for emergency callouts across Castleknock and the surrounding area. Based just 16km away in Sandyford.

085 782 8222 24/7 Emergency Line
Call Now

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.