Hertfordshire · London and the South East
Knebworth Chimney Survey
Get a clear view of the chimney stack at a property in Knebworth. We visit on weekdays and at weekends.
- Gaps in the mortar around the pots
- Redundant stacks capped without ventilation
- Flashings pulling away from the stack
What happens on the day
Photographs are taken throughout the visit, so you can see in the report what we found and where. Close-ups come from the safest viewpoint available. Most surveys take between one and two hours for most houses, and more on a big or complicated roof. Parking around Knebworth is typically easier than in a town centre, but mention lanes, gates or long drives. On bungalows and lower roofs, much can be seen from the ground, with the loft showing the underside, while taller roofs may need other vantage points or the drone where applicable.
- You tell us whether any stacks are shared, unused or leaning.
- The flashings and the roof around each chimney are inspected.
- We check the flaunching and pots on every stack.
- Any lean, spalling or worn pointing is recorded.
- The report explains the condition and which work is most urgent.
Before the survey
- Dig out any old roof reports or invoices
- Make sure the loft hatch can be reached
- Let us know where we can park nearby
Book a survey
To arrange a survey, call 07833 053749 or email us with the address and what you’d like to know about the roof. You will know the price before anything is booked.
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How a chimney survey works in Knebworth
Many homes have chimneys that are no longer used. Even when it isn’t used, a stack has to stay weathertight. If it has been capped without ventilation, damp can build up inside it. We check how redundant stacks have been capped and look for damp in the chimney breasts. You get photos of each stack and our recommendations. We survey chimney pots and cowls, lead flashings and flaunching, and people most frequently book us about damp patches on chimney breasts and cracked or missing flaunching.
Around Knebworth, gardens, hedges and nearby trees can mean leaves and moss end up on roofs and in gutters. Blocked gutters overflow and soak the walls below. It’s the kind of slow problem a roof report picks up early. Moss on the roof and weeds in the gutter are both easy to spot from the ground.
We write the report in plain English, so you do not need to be a roofer to follow it. Photographs show what each point refers to, and recommendations are put in order of urgency where relevant.
- Where
- Knebworth (SG3)
- Region
- Hertfordshire
- Price
- From £150 inc. VAT
- Your report
- Emailed report with photos and recommendations
- Appointments
- Weekdays and weekends
- Cover
- PI and public liability insurance
- Call
- 07833 053749
- Updated
- 27 October 2026
Rented homes, blocks and businesses
Letting agents often book on a landlord’s behalf. We agree a time with the tenant beforehand.
If you own several properties, surveys can be booked for more than one address. To discuss a number of properties, ring 07833 053749 or email us with the addresses.
Roof by roof
Chimney pots and cowls
Damaged pots are a safety concern as well as a leak risk. We record their condition with photographs.
Rendered stacks
Water can get in through cracks and then struggle to dry out. Cracks are photographed and noted.
Nearby places to Knebworth
Other services in Knebworth
DIY checks: what’s safe
Watch the gutters in a downpour, from a window or the ground. Overflowing water can be a sign of a blockage or a gutter that has dropped.
It’s useful to keep a record: dates of leaks, photos from the ground and any work done on the roof. Share it with us when booking and it will help the survey.
Common questions in Knebworth
Will you come out to Knebworth?
Yes. Knebworth is within the area we cover, which takes in towns, villages and rural addresses. We work right across London and South East England. Let us know about access, parking and anything unusual about getting there as you book.
Can a landlord with a rental near Knebworth station book a roof survey?
Yes, landlords and letting agents book with us as well as owners. Just phone 07833 053749 or use the contact form and tell us about the building, including who will give access on the day.
Is this an asbestos survey?
No. We can flag materials that might contain asbestos, but only a specialist asbestos surveyor can confirm it. Buildings built or refurbished before 2000 may contain it.
How many surveys have you done?
We have completed more than 5,000 surveys, over more than 20 years, with 98% customer satisfaction.
What’s in the report?
It sets out what we found, why it matters and what we recommend, backed by photos. Anything we couldn’t see safely is noted too, so you know exactly what was covered.
What causes damp on a chimney breast?
Damp on a chimney breast normally means water is getting into the stack, or moisture is trapped inside it. We check the stack, the flashings and how unused flues are capped, and record what we find.
How can you see the top of the stack?
We look from the ground, from windows and from the loft where it is safe. Where it applies, our Premium Survey adds a drone inspection for a closer view. The report is clear about anything that couldn’t be seen.
Honest limits
This isn’t a RICS building survey, a structural engineer’s report or an asbestos survey. It also has these limits:
- What’s inside the brickwork or behind render, without opening up
- A structural engineer’s assessment
- Whether the flue is safe to use
Not sure which survey suits your roof? You can call 07833 053749 or drop us an email and we will tell you before booking. What a survey covers and does not.
Roof types and parts we check
- Chimney breasts
- Shared and party-wall stacks
- Flaunching
- Lead flashings
- Brick chimney stacks
- Chimney pots and cowls
Leave it or get it looked at?
If a stack seems to lean, don’t leave it. We record its condition and recommend a structural engineer where needed, so you can decide what to do next. Around Knebworth, leaves and moss in gutters lead to overflowing water and damp walls. It is easy to sort the cause early and slow to dry a damp wall.
Chimney survey starts from £150, including VAT. Packages run from Basic at £150 through Standard at £250 to Premium at £400, with VAT included, and we can help you choose.
What you get with us
- More than 5,000 surveys completed
- Satisfaction rate of 98%
- Drone and thermal imaging surveys available
- Weekday and weekend surveys
Knebworth homes and their roofs
About 1.3 miles north-west lies Knebworth House, a reminder of how long the area around Knebworth has been built on. Older homes in the wider area often have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and the council can say whether a home is in a conservation area. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, and flat-roofed additions turn up almost everywhere. Whichever you have, the details that tend to fail before the covering itself get the closest look.
The streets around a church such as Church of St Martin are frequently among the oldest in a place, and if you own one of the older houses nearby, old fixings, lead flashings and tall chimneys are typical of older roofs. Trees in and around Knebworth Park shed leaves that can end up in nearby gutters. Landlords with a home close to Knebworth station may find that knowing the condition of the roof, chimneys and gutters helps you plan work rather than react to complaints.
Knebworth is about 3 miles south of Stevenage, in Hertfordshire. Knebworth is one of many places we visit across Hertfordshire. Our area takes in places right across Hertfordshire. London is in our area too.
Here we cover the SG3 postcode area for chimney surveys. Local streets include London Road, Deanscroft and Lytton Fields, all of which we cover. Neighbouring places we cover for chimney surveys include Woolmer Green (1 mile south), Bragbury End (1 mile north-east), Oaklands (2 miles south), Datchworth (2 miles south-east) and Shephall (2 miles north). We also work in nearby towns such as Hemel Hempstead (14 miles south-west), Stevenage (3 miles north), St Albans (10 miles south-west), Bishop's Stortford (15 miles east), Welwyn Garden City (5 miles south) and Harpenden (8 miles south-west).
What’s near Knebworth
Locally, jobs take us to homes and businesses close to Barnwell School and Knebworth Park, among other places. There is a railway station in Knebworth itself: Knebworth station. Well-known places in the area include Benington Castle (3.6 miles north-east) and Datchworth Museum (1.7 miles south-east). Not far away are Mardley Heath.