Hertfordshire · London and the South East
Roof leak investigation in Old Knebworth, Hertfordshire
Get a clear view of the leaking roof at a property in Old Knebworth from an independent roof surveyor. Visits run on weekdays and weekends, in the daytime.
- Water that shows only in certain storms
- Leaks at a dormer or roof window
- Brown rings on upstairs ceilings
Old Knebworth: your questions answered
Is Old Knebworth within the area you cover?
Yes, Old Knebworth is on our map. Villages and rural addresses get the same survey as a town house.
Do you carry out roof surveys in Old Knebworth?
Yes, Old Knebworth is one of the places we work. Every survey there gets the same written report with photographs, and visits run on weekdays and weekends.
Is the repair included in the leak investigation?
The investigation is about finding the cause. The repair is not part of it. You get a report with photos showing where the water is getting in and what needs attention, which whoever carries out the work can follow.
How long have you been surveying roofs?
We have completed more than 5,000 surveys, across 20+ years of surveying roofs.
Is this an asbestos survey?
No. We can flag materials that might contain asbestos, but confirming it is a job for a specialist asbestos surveyor. It may be present in buildings built or refurbished before 2000.
Will you go up on the roof?
Not always. Safety comes first, and fragile or steep roofs cannot always be walked on. We use safe viewpoints, the roof space and a drone where applicable.
Are you insured?
Our surveys are covered by professional indemnity and public liability insurance. Ask if you need details for a managing agent or building owner.
How a roof leak investigation works in Old Knebworth
Not every drip is a leak. In a badly ventilated roof space, condensation can form under the roof and drip, leaving marks that look just like rainwater. Telling the two apart matters, because they need very different work. We look at the pattern of damp, the weather and the ventilation before reaching a view. If you are worried about water through the ceiling under a flat roof and leaks that appear only in driving rain, a survey will tell you what’s going on, on valleys and parapet gutters, the roof space and slate and tile slopes alike.
Somewhere as small as Old Knebworth, older roofs have frequently been repaired many times. That makes it hard to tell new damage from old wear, and the difference matters, particularly to an insurer. We look at whatever is safely visible and set out what we find. Older walls and timbers hold water for a long time, so it’s worth finding the cause soon.
Where we can’t see part of the leaking roof, the report says so. You will know exactly what was inspected and what wasn’t.
- Where
- Old Knebworth (SG3)
- Region
- Hertfordshire
- Prices
- From £150 inc. VAT
- Reports
- Emailed report with photos and recommendations
- When we survey
- Monday to Sunday, daytime
- Insured
- PI and public liability insurance
- Telephone
- 07833 053749
- Page updated
- 27 October 2026
Towns and villages near Old Knebworth
Other services in Old Knebworth
Why get it checked now?
A leak that returns after a repair normally means the real source wasn’t found. We look past the obvious spot and check each likely route. That’s often what breaks the cycle. Older cottages and farmhouses around Old Knebworth can have roof timbers that have been there a very long time, where water from a failed roof can cause rot if it is left.
Our price is from £150, including VAT. What you pay depends on the size and height of the roof, access and which survey you book.
Why book with us
- Drones and thermal imaging where applicable
- Professional indemnity and public liability insurance
- Visits on any day of the week
- An independent view of the roof
Read what a roof survey costs or what we found on two real jobs.
Roof leak investigations in Old Knebworth: local notes
Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates, and flat-roofed additions turn up almost everywhere. The covering and its details give the first clues when tracing where water is coming from. About 0.2 miles north-west lies Knebworth House, a reminder of how long the area around Old Knebworth has been built on. On older houses around here, roofs often carry the marks of earlier repairs, from replaced slates to new lead, and the council can say whether a home is in a conservation area.
If you let a flat or house near Knebworth station, tracing a leak quickly matters when a tenant is living with it. If you live near a park such as Knebworth Park, or anywhere with mature trees, autumn leaves can block gutters and valleys, and blocked gutters overflow and soak walls. If you own one of the older houses in the streets near Church of St Mary and St Thomas, the leak may come from a chimney, a valley or tired lead rather than the covering itself.
Old Knebworth is about 3 miles south-west of Stevenage, in Hertfordshire. We visit Old Knebworth as part of our work across Hertfordshire, for houses, flats and commercial buildings. Our Hertfordshire coverage includes Old Knebworth. For surveys nearby, see our London page.
We work across SG3 for roof leak investigations. Whether your property is on Old Knebworth Lane and Park Lane or a nearby road, we can help. Nearby, we also carry out roof leak investigations in Nup End Green (1 mile south-west), Driver's End (1 mile south-west), Rableyheath (1 mile south), Pottersheath (1 mile south) and Langley (2 miles north-west). We also work in nearby towns like Hemel Hempstead (13 miles south-west), Stevenage (3 miles north-east), St Albans (10 miles south-west), Welwyn Garden City (5 miles south), Harpenden (7 miles south-west) and Hitchin (6 miles north-west).
Around Old Knebworth
We work in homes and buildings around Knebworth Park and Robin Hood And Little John Public House, among other places. Old Knebworth’s nearest station is Knebworth station, about 1 mile east of the centre. Well-known places in the area include Lister Hospital (3.7 miles north) and Stevenage Museum (2.2 miles north). Open spaces near Old Knebworth include Mardley Heath.
What we cannot see
We only report whatever is safely visible on the day, so some things are outside what a survey can do:
- Leaks that only appear in weather we cannot recreate
- A structural engineer’s report
- Putting the leak right
If you’re not sure which survey you need, call 07833 053749 or email us and we will give you a straight answer. What a survey covers and doesn’t.
Roofs we survey in Old Knebworth
- Chimney stacks
- The roof space
- Lead flashings
- Flat roof details
- Slate and tile slopes
- Rooflights and dormers
- Valleys and parapet gutters
What happens on the day
Where it’s relevant and can be reached safely, the roof space is checked as well as the outside. Inside, we look for staining, damp, gaps and signs of movement. All in, the survey normally takes about one to two hours for a house; commercial roofs usually need 3–4 hours. Cottages and farmhouses around Old Knebworth often have roofs at several levels, with lean-tos and outbuildings attached. We work round each section in turn, from the safest viewpoints.
- You let us know where the water appears, when, and what the weather was doing.
- Inside, we check the stain and the ceiling around it.
- In the loft, we follow any signs of water back towards the roof.
- Outside, we check flashings, valleys, chimneys, gutters and flat roof details from every safe viewpoint.
- We email a written report showing where the water most likely gets in.
Preparing for the visit
- Point out any leaks or damp patches
- Jot down any questions you want answered
- Leave a clear route to the loft
Arrange a survey
For a price for roof leak investigations in Old Knebworth, phone 07833 053749 or drop us an email. The address, the type of property and what you’d like to know help us price the survey accurately.
Advice
Surveys for landlords and agents in Old Knebworth
Buyers’ agents can book surveys on behalf of their clients. Reports are emailed, so they’re easy to pass on, photographs included.
Landlords, agents and building managers in Old Knebworth and across Hertfordshire can book any of our surveys. To discuss a property or a block, ring 07833 053749 or use the contact form.
Useful tips for Old Knebworth property owners
From years of surveys, a few habits stand out as worth the effort:
- Photograph the stain each time it appears
- Stay off ladders and the roof
- Catch drips in a bucket and protect the floor
- Mention any plumbing above the damp area
If the leak turns out to be condensation, the report says so, and suggest how the loft space could be better ventilated. That avoids roof work that wouldn’t help.
Have leaves and moss cleared from gutters, valleys and outlets, ideally once the leaves have fallen. Blocked outlets on parapet and flat roofs cause many leaks. Leave the clearing to someone with the right equipment.
Checking the roof from the ground
Look up at the roof after a storm, from the ground: broken slates or tiles in the garden, gaps along the ridge or loose lead are signs to note. Leave anything above ground level to a survey.
You can learn a lot from the ground. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Please don’t climb up for a closer look.