Tell us about your property — 1930s semi on the Sunbury side, 1950s family home near Kempton, post-war house bordering Lower Feltham, or newer build on former market garden land. Fixed price from £195.
Our specialist assesses every element with Thames basin conditions in mind — tile and slate condition, timber structure, wall plate moisture levels, roof space ventilation and condensation, chimney mortar, lead flashings, ridge tiles, gutters, and the critical question of whether ground moisture is affecting your roof timbers from below.
Full written report with photographs, condition ratings, remaining lifespan estimates, and a prioritised action list with budget figures. Moisture readings, ventilation assessment, and clear distinction between maintenance needs and end-of-life replacement.
Feltham Hill is a residential area on the Surrey side of the Feltham-Sunbury boundary, officially within the Borough of Spelthorne and part of the Sunbury-on-Thames parish since boundary changes in the 1930s transferred 98 acres from Feltham. The area sits in the flat Thames basin, on a surface of gravels and brick-earth that falls gently from around 50 feet in the north to 25 feet near the Thames. Feltham itself was largely agrarian until the twentieth century — its economy was dominated by market gardening, and a popular pea variety called Feltham First was named for being first grown here. From the 1930s onwards, market gardens were replaced by housing, light industry, and gravel extraction. A roof survey Feltham Hill assessment from £195 understands how this flat, water-rich landscape affects the housing built upon it.
Feltham Hill’s roofing challenge is deceptively simple but genuinely costly: post-war housing on flat, water-saturated ground. The Thames gravel that underlies the area is free-draining in one sense — surface water passes through it easily — but the water table sits permanently high because the flat terrain offers no natural drainage gradient and the major reservoirs in the Spelthorne area maintain elevated water levels across the borough. This high water table means ground moisture migrates upward through masonry foundations and walls by capillary action. In a house with adequate damp-proofing and roof ventilation, this moisture is managed. In a 1930s-1960s house where the original damp-proof course has degraded and roof ventilation was minimal by design, rising moisture reaches wall plate level and creates persistently damp conditions in the roof space.
A roof space with elevated humidity accelerates every form of deterioration. Timber battens and rafters absorb moisture, promoting wet rot and weakening their load-bearing capacity. The original hessian or bituminous felt underlay traps condensation against the underside of tiles, preventing drying. Nail fixings corrode faster in humid conditions. Chimney mortar, already weathered externally after decades, is also attacked from within by moisture rising through the stack. The roof that appears to have 10-15 years of life remaining when assessed from outside may have only 3-5 years when the hidden moisture damage is factored in. A £195 survey examines both sides of the roof covering.
For homeowners: A £195 roof survey reveals whether Thames basin moisture is silently accelerating your roof’s deterioration — the damage that accumulates in the roof space where you never look.
For buyers: Before committing £250K-£550K+ on a Feltham Hill property, a £195 roof survey reveals the true remaining lifespan by assessing both external condition and internal moisture — because the two together determine when the roof will actually need replacing.
Nearby Areas: We also cover Sunbury-on-Thames, Ashford, Shepperton, Staines, and Hampton.
A young couple purchased a three-bedroom 1950s semi-detached house in Feltham Hill for £385K. Concrete tile roof, rendered walls, bay window, front and rear gardens. Previous owners had modernised the kitchen and bathroom and replaced the windows with double glazing. The purchase survey described the roof as “concrete tile covering in reasonable condition for age, routine maintenance recommended.” No specialist roof survey was commissioned. The survey was conducted in June.
Year 1 (November): Condensation appears on the inside of the loft hatch and on stored items in the loft. Owners assume poor ventilation from the new double glazing reducing airflow. Install a trickle vent. Minor improvement.
Year 2: Black mould appears on the underside of the felt in the loft, spreading across the north slope. Damp patches develop on the top-floor bedroom ceilings during cold spells. Roofer checks externally — replaces three cracked tiles and clears moss from the north slope. Cost: £450. Condensation continues through winter.
Year 3: Specialist investigation reveals the full picture. Three factors are combining to destroy this roof from within. First, the Thames gravel water table is high and the original 1950s damp-proof course has partially failed, allowing ground moisture to migrate up the walls to wall plate level. Moisture meter readings at the wall plates show levels well above safe limits. Second, the replacement double glazing has sealed the house more tightly than the original single-glazed windows, reducing the natural air exchange that previously helped ventilate the roof space. Third, the original bituminous felt underlay is impermeable — condensation that forms on its underside has no way to escape, creating a permanently damp environment against the timber battens. Both wall plates show early wet rot. Battens on the north slope are soft in several locations. The ridge board shows signs of moisture damage. Ventilation improvement, wall plate treatment, partial batten replacement on north slope, breathable membrane where felt has failed, damp-proof course renewal: £8,000-£12,000.
What a £195 Roof Survey Would Have Shown Before Purchase: “This 1950s semi sits on Thames gravel with a high water table. Moisture meter readings at wall plates show elevated levels consistent with rising damp past the degraded damp-proof course. Roof space humidity above safe limits. Impermeable felt underlay trapping condensation against battens. North-slope battens showing early softening. Double glazing has reduced natural ventilation without compensating roof-space airflow. Wall plates require treatment within 2-3 years. Budget £6,000-£9,000 for ventilation improvement, damp-proof course renewal, and batten replacement where moisture damage has progressed.”
The Lesson: In Feltham Hill, the water table attacks from below while the roof ages from above. When modern improvements like double glazing seal the house without compensating ventilation, moisture gets trapped in the roof space with nowhere to go. A £195 survey reads the moisture levels that tell you what the tiles cannot.
Professional roof surveys at Feltham Hill require understanding of Thames basin hydrology, how high water tables in gravel subsoils create rising moisture that reaches roof-space level, how post-war construction with impermeable felt underlay traps condensation, and how modern improvements like double glazing and loft insulation can inadvertently accelerate roof-space moisture problems. We combine RICS-registered qualifications with specialist knowledge of Spelthorne’s flat, water-rich terrain and the specific vulnerabilities of 1930s-1960s housing stock.
From 1930s semis to 1950s family homes to post-war bungalows, professional roof survey Feltham Hill assessment from £195 provides moisture-aware, geology-informed intelligence. We assess external tile condition, internal timber health, wall plate moisture levels, roof-space ventilation, condensation patterns, and the critical question: is your roof deteriorating from above, from below, or both?
Exact quotes from £195 when you call. No surprises. Most Feltham Hill residential surveys from £195.
Thames gravel is free-draining, but the water table sits high because the flat terrain offers no drainage gradient. Ground moisture migrates upward through masonry walls by capillary action. Where the damp-proof course has degraded — common in 1930s-1960s construction — this moisture reaches wall plate level and creates permanently elevated humidity in the roof space. Our surveys measure moisture levels at wall plates to assess whether ground conditions are affecting your roof.
Not directly, but replacing single-glazed windows with sealed double glazing reduces natural air exchange through the house. In post-war houses designed with some airflow through gaps in single-glazed frames, sealing those gaps can trap moisture inside the building. Without compensating ventilation in the roof space, humidity rises and condensation increases. Our surveys assess whether modern improvements have disrupted the building’s original moisture management.
All Feltham Hill plus Sunbury, Ashford, Shepperton, and surrounding areas.
Typically 1.5-2.5 hours on-site. Report within 48 hours.
From £195 for standard residential properties. Call 07833 053 749 for an immediate exact quote.
Not necessarily. Concrete tiles from the 1950s can last 60-80+ years in good conditions. But “good conditions” means adequate ventilation, intact felt underlay, sound battens, and manageable moisture levels. On Thames gravel with a high water table, the conditions inside the roof space may have shortened the effective lifespan. Our survey provides an honest assessment of remaining life based on actual conditions, not just tile appearance.
Feltham Hill offers affordable Surrey housing with excellent transport links. Feltham station (Waterloo, Windsor, Reading lines) is nearby. Heathrow Airport is approximately 2.5 miles north-west, providing both employment and airport access. The A316 and M3 provide road connections. Sunbury-on-Thames village with its Thames-side pubs and restaurants is close by. Kempton Park racecourse is nearby. Properties are predominantly 1930s-1960s semi-detached and terraced houses with some bungalows and newer developments. Values typically range from £250K to £550K+, offering more affordable entry to Surrey than many neighbouring areas.
At these values, a £195 roof survey Feltham Hill assessment is essential. Understanding whether your post-war roof is ageing normally or being accelerated by Thames basin moisture conditions could prevent a £5,000-£15,000 surprise.
Feltham Hill, Sunbury Common, Lower Feltham border, Kempton area, Ashford Common
Sunbury-on-Thames, Ashford, Shepperton, Staines, Hampton
TW13 (Feltham Hill, Feltham), TW15 (Ashford), TW16 (Sunbury)
Whether you own a 1930s semi, a 1950s family home, or a post-war bungalow in Feltham Hill, professional roof survey assessment from £195 reveals the moisture conditions that determine your roof’s true remaining lifespan. On Thames basin gravel with a permanently high water table, the damage that matters most is often the damage you cannot see — the elevated humidity, the softening battens, the wall plates absorbing moisture from below. A £195 survey measures what matters.
Call 07833 053 749 now. Roof survey Feltham Hill from £195. Report within 48 hours.
