Flat roof maintenance means annual inspection of drainage outlets, surface condition and upstands from ladder height, plus a professional inspection every 5 years for roofs over 10 years old. GRP and EPDM roofs last 25-40 years when maintained. Standing water for over 24 hours is the main cause of premature failure.
Flat roofs have an undeserved reputation for unreliability. Traditional felt flat roofs earn that reputation; modern GRP and EPDM systems do not. But even a well-installed modern flat roof requires annual maintenance to achieve its design lifespan. Neglecting drainage maintenance and surface inspection is the most common way a 25-year flat roof fails in 12.
Once a year — ideally in autumn — do a physical inspection of your flat roof. Access from a ladder at the roof edge is sufficient for most checks. Do not walk on felt flat roofing (it's too fragile); walking on GRP and EPDM is acceptable with care.
Free flat roof condition check across Ashford and Kent. Call to book.
Book Free CheckEvery flat roof should drain fully within 24 hours of rain stopping. If there is standing water on your flat roof 48 hours after the last rain, the drainage is inadequate. Common causes: blocked outlet (fix immediately), insufficient fall toward the outlet (requires re-levelling the deck — a professional job), or an outlet that is too small for the catchment area (requires upgrading).
BS 6229 sets the minimum drainage fall for flat roofs at 1:80, and standing water remaining for more than 48 hours is classified as ponding that accelerates membrane degradation.
Source: BS 6229 — Code of practice for flat roofs
Standing water on a GRP flat roof doesn't cause immediate failure but it does accelerate algae growth and UV degradation of the topcoat. On a felt flat roof, standing water dramatically shortens lifespan — felt is not designed for permanent submersion.
Felt flat roofs: any felt system installed before 2005 on a Kent property is approaching or past end of life. Signs of imminent failure include blistering, surface cracking, visible fabric showing through the weathered surface layer and standing water that persists more than 48 hours after rain. Replace rather than patch — patching a failing felt roof delays the inevitable and the patches rarely hold for more than one winter.
GRP flat roofs: surface crazing or chalking of the topcoat at 10–15 years is normal weathering that is remedied by applying a new topcoat without replacing the laminate. This significantly extends GRP lifespan and costs a fraction of full replacement. We carry out GRP topcoat renewal as a standalone service.
EPDM flat roofs: the rubber membrane itself typically outlasts the adhesive bonding at edges and penetrations. Annual inspection of edge bonds and penetration seals is important. If the membrane is debonding at multiple points, full re-bonding or replacement is required.
Flat roof inspection and maintenance across Ashford and Kent. Call to book.
Book Flat Roof InspectionEvery flat roof maintenance guide job starts with a free inspection and written quote before any work begins. We do not start work until you have confirmed the written quote. Our standard rates apply across Ashford and the surrounding Kent area.
We cover all Ashford postcodes and the surrounding towns: Folkestone, Canterbury, Maidstone, Tenterden, Hythe and the villages across the Weald. Emergency cover is available 24 hours a day on 01233 877 146.
No call-out fee across our full service area. Written quote before work starts. For flat roof maintenance guide work the quote is provided on the same visit as the inspection in most cases. You pay only for work carried out.
All re-roofing work and major repairs carry our written 10-year workmanship guarantee. Lead flashing work is guaranteed for 10 years. Minor tile repairs carry a 2-year guarantee. The guarantee is provided in writing at completion and transfers to a new owner if the property is sold.
We are registered with the National Federation of Roofing Contractors. Verify our registration at nfrc.co.uk. We carry 5m public liability insurance on every flat roof maintenance guide job. Insurance certificate available on request before work starts.
Ashford's housing stock spans five decades of construction: Victorian and Edwardian terraces in Newtown and the older town streets, 1930s semis in Kennington and Willesborough, post-war and 1960s estates at Bockhanger, Stanhope and Park Farm, and more recent development across the southern suburbs.
Each era presents different characteristics. Victorian clay tile on period properties requires matching reclaimed material and lime mortar at any repointing work. 1960s concrete interlocking tile on the estates is now 50-65 years old with corroded nail fixings on most unmodified properties. Understanding which housing era a property belongs to is the starting point for any assessment.
These estates are Ashford's highest-volume source of roofing work. The 1960s-70s concrete interlocking tile stock is now 50-65 years old. Nail sickness is present on the majority of unmodified properties. If you live in one of these areas and have not had roofing work in the last 15 years, a free assessment is worthwhile.
The Victorian terraces in Ashford's Newtown area and the older streets around the town centre require period-appropriate specification: reclaimed or reproduction clay tile, lime mortar at chimney repointing, and conservation-aware approach to any work on visible elevations.
Free survey and advice across Ashford and Kent. Call 01233 877 146.
Call 01233 877 146Annual flat roof inspection from ladder height at the edge covers the four main risk areas: drainage outlet clearance; waterproofing surface condition; upstand integrity; and perimeter edge condition. Most domestic flat roof inspections can be carried out from a ladder without walking on the roof surface.
Clear drainage outlets of all accumulated debris. Check the waterproofing surface for blistering (felt), hairline cracking at joints (GRP), or surface hardening (EPDM indicating UV degradation). Check that upstands are still running to 150mm minimum height and adhered along their full length. Check that perimeter trim or drip edge is intact and not lifting.
We recommend a professional inspection every 5 years for any flat roof over 10 years old. The professional inspection includes condition assessment from close range, drainage fall measurement, and an internal ceiling inspection below the flat roof for early signs of moisture ingress. GRP and EPDM flat roofs at year 15-20 often have minor issues addressable for £150-400 that, if deferred, become £3,000-5,000 replacement projects.
GRP hairline crack: clean, abrade, laminate strip, topcoat. £100-300. EPDM seam re-adhesion: clean, new adhesive, press under weight. £80-200. Upstand re-termination: remove old bar, re-adhere upstand, new bar and sealant. £150-350 per upstand. Outlet replacement: patch surrounding membrane, bond new outlet. £150-300.
For context on how roofing costs compare across the range of work we carry out, here are realistic price ranges for the most common jobs across the Ashford area. All prices include labour and materials. VAT is not applicable on most domestic residential roofing work.
| Job Type | Typical Cost |
|---|---|
| Single tile replacement | £150 – £300 |
| Ridge repointing (per 4m) | £200 – £400 |
| Lead chimney flashing replacement | £500 – £1,100 |
| Full re-roof (3-bed semi, concrete tile) | £4,800 – £7,500 |
| Flat roof replacement (GRP, up to 20m2) | £900 – £1,800 |
| Full gutter clear (semi-detached) | £80 – £160 |
| Fascia and soffit replacement (semi) | £800 – £1,800 |
| Roof condition survey | £120 – £200 |
Free written quotes on all work. No call-out fee. Call 01233 877 146 to book.
We are a family-run roofing business based in Ashford, covering the town and the surrounding Kent area. We have been working on roofs in this area since 2003. Every job is carried out by our own employed team — we do not subcontract labour. The people who quote are the people who work.
We are registered with the National Federation of Roofing Contractors (NFRC). Our registration can be verified at nfrc.co.uk. We carry £5m public liability insurance on every job. Our insurance certificate is available on request before any work starts. All re-roofing work carries a written 10-year workmanship guarantee. Lead flashing work is guaranteed for 10 years. The guarantee is transferable to a new owner if the property is sold.
We cover Ashford and a broad area of the surrounding Kent countryside: Folkestone, Hythe, Canterbury, Maidstone, Tenterden, and the villages across the Weald and Romney Marsh. Emergency cover is available 24 hours a day, 7 days a week. Call 01233 877 146 for any roofing emergency. For non-urgent work, we aim to survey within 5-7 working days and have the quote in writing within 48 hours of the survey.
We do not charge for call-outs or surveys. Every job gets a written quote before a single tile is moved. The quoted price is the price on the invoice unless we identify and agree additional scope with you during the work. For re-roofing projects where deck condition is unknown before stripping, we include a clear provisional allowance for batten replacement rather than presenting you with a surprise on invoice.
Last reviewed: July 2026
Annually from ladder height for drainage, surface and upstand condition, plus a professional inspection every 5 years for any flat roof over 10 years old.
Blistering on felt, ponding water that stays over 24 hours, cracking at upstand joints on GRP, or surface hardening on EPDM all indicate the roof needs attention.
GRP and EPDM can be repaired when damage is localised. Felt cannot be reliably patched — replacement is more cost-effective once failure covers more than 20% of the surface.
Annual inspection from £80, GRP crack repair £100-300, EPDM seam re-adhesion £80-200, upstand re-termination £150-350 per upstand.