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Spray Foam Removal Specialists

Spray Foam Removal
Knocklyon

Professional spray foam insulation removal across Knocklyon. Free inspection, written quote, no pressure tactics.

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Inspection
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Spray foam roof insulation was widely applied in Irish homes from the 1980s through to the 2000s, marketed as an energy-saving measure for the attic space. Peak Roofing and Building carries out professional spray foam removal across Knocklyon, covering both open-cell and closed-cell foam systems. Two types were commonly used: open-cell foam, which is soft and slightly permeable, and closed-cell foam, which sets hard and is completely impermeable to water vapour. Closed-cell foam in particular is the more serious problem — it creates a sealed vapour barrier across the underside of the roof structure, trapping moisture inside the roof void. Over time, that trapped moisture condenses and causes rot in the roof timbers beneath. The critical issue is that the foam physically encases the rafters, making it impossible for surveyors or structural engineers to see the condition of the timber underneath — which is precisely why so many lenders in Ireland and the UK will now decline to mortgage or remortgage a property until the foam has been professionally removed and the underlying timber structure assessed and certified.

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, spray foam insulation is an increasing issue in 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 Spray Foam Removal 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 €2,000 depending on roof size and foam thickness. Free inspection to assess scope before any commitment — we assess the foam type and coverage before providing a written quote.
Yes, in many cases. Most mainstream lenders in Ireland and the UK will not approve a mortgage or remortgage on a property with spray foam insulation in the roof until it has been professionally removed and the underlying roof timbers assessed and certified. If you are buying, selling or remortgaging a property in Knocklyon and spray foam has been flagged, we can inspect, remove and provide a written structural report suitable for your solicitor and lender.
Open-cell foam is soft and slightly permeable — it is less likely to cause severe moisture problems but many lenders will still flag it. Closed-cell foam sets hard, is completely impermeable to water vapour, and creates a sealed barrier that traps moisture against the roof timbers, accelerating rot. It also bonds more strongly to surfaces, making removal harder and more labour-intensive. Both types are found in Knocklyon properties built or renovated between the 1980s and early 2000s.
Spray foam looks like a yellowed or off-white foam coating applied to the underside of the roof rafters, visible from inside the attic. A quick look with a torch will usually reveal it immediately — the rafters will be partially or fully encased in foam. If you are unsure, we can carry out a free inspection at your Knocklyon property.
Removal from a standard semi-detached in Knocklyon typically takes 1–2 days depending on foam coverage and type. Once removed, we carry out a full visual and physical assessment of all exposed roof timbers, documented with photographs. Timbers in good condition are certified. Any rot or structural deterioration is noted in our written report, and we provide a separate quote for any remedial timber work required.
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.

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Spray Foam in Your Roof? Get a Free Inspection Get a free roof inspection and honest advice from your local roofing experts.