Kent · London and the South East
Roof leak investigation in Knockholt, Kent
Roof leak investigations in Knockholt and the rest of Kent. We survey on weekdays, Saturdays and Sundays.
- Wet patches on loft insulation
- Wet patches high on an inside wall
- Condensation that looks like a leak
Surveys for landlords and agents in Knockholt
Any of our surveys can be booked by landlords, agents and building managers in Knockholt. For a price for a let property or a block, call 07833 053749 or send us an email.
If you own several properties, you can book surveys for several addresses. To arrange surveys for several addresses, phone 07833 053749 or send us an email.
Roof leak investigation in Knockholt
Water is good at hiding where it gets in. It can run along a rafter, a batten or the underlay before it drips, so the stain on your ceiling is seldom right under the hole. Our leak investigation traces it back, one likely route at a time. Patching the spot above the stain often misses the real cause. Finding the route first lets the repair go where it is needed. If you’ve noticed wet patches high on an inside wall and stains around a skylight, a survey will tell you what’s going on.
Roofs in small places like Knockholt frequently stand in the open, where storms hit ridges, verges and chimneys hardest. Once water gets into older walls, it takes a long time to dry, so it pays to find the cause quickly. A record with photos is useful if you need to show the damage to anyone else.
If any part of the leaking roof couldn’t be seen safely, we say so in the report. That way, it is clear what was covered and what wasn’t, and what we’d suggest next.
- Place
- Knockholt (TN14)
- Region
- Kent
- Cost
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- Appointments
- Weekdays, Saturdays and Sundays
- Insurance
- PI and public liability insurance
- Telephone
- 07833 053749
- Updated
- 27 October 2026
Wind, rain and roofs in Knockholt
Down House, about 2.7 miles north-west, is one of the historic houses in the wider area around Knockholt. Period homes nearby can have lead valleys, tall chimneys and a patchwork of past repairs, and any change of roofing material on a listed home needs checking with the council first. Across Kent, older roofs are frequently handmade clay or peg tiles, and tile-hanging on upper walls is a familiar sight. You will also find oast houses and timber-framed Wealden hall houses among the county’s older buildings. Where water gets in depends a good deal on what the roof is made of and how it’s detailed.
Landlords with a home close to Knockholt station may find that finding the cause of a leak fast keeps a tenant’s home dry and the work focused.
Knockholt is about 4 miles north-west of Sevenoaks, in Kent. Whether the building in Knockholt is a house, a flat or a commercial unit, we can survey the roof on a weekday or at the weekend. We cover towns and villages across Kent. There’s also a page for London.
We work across TN14 for roof leak investigations and the streets around it. We offer roof leak investigations to properties on Main Road and Blueberry Lane. Neighbouring places we cover for roof leak investigations include Knockholt Pound (1 mile north-east), Halstead (2 miles north-east), Sepham Heath (2 miles north-east), Pratt's Bottom (2 miles north) and Twitton (3 miles east). We also work in nearby towns such as Dartford (11 miles north-east), Sevenoaks (4 miles south-east), Royal Tunbridge Wells (14 miles south-east), Gravesend (14 miles north-east), Tonbridge (11 miles south-east) and Northfleet (13 miles north-east).
Near you in Knockholt
We work in homes and buildings around The Three Horseshoes pub. Knockholt’s nearest station is Knockholt station, roughly 2.7 miles north-east. Other landmarks nearby include Orpington Hospital (3.6 miles north) and Otford Heritage Centre (3.9 miles east). Open spaces near Knockholt include Betsom's Hill and Downe Bank.
How the survey works
Every roof is different, but as a rough guide the survey takes an hour or two at a typical home; commercial roofs usually need 3–4 hours. If you have questions on the day, just ask. Around Knockholt, older homes can have small or awkward roof spaces, so it helps to know whether there’s a loft hatch and how easy it is to reach. We only go where it is safe.
- You pick a Basic, Standard or Premium Survey.
- A visit is booked for a weekday, Saturday or Sunday.
- The investigation works from the stain back to the roof.
- Moisture detection and thermal imaging are used where your package includes them and they help.
- You get photos, the likely cause and clear recommendations.
Before the survey
- Have any questions written down, so nothing gets missed
- Let us know about any leaks, stains or damp patches you know of
- Mention any parking restrictions on your street
Book a survey
If you’re buying, it is useful to book soon after your offer is accepted, so you have the findings in time to act on them before you exchange. Otherwise, simply call 07833 053749 or drop us an email whenever suits you.
Read more
Useful tips for Knockholt property owners
Getting the most from a roof leak investigation starts before we arrive and carries on afterwards. Some tips:
- Catch drips in a bucket and protect the floor
- Note the weather when the leak shows
- Clear the loft hatch so we can get in
- Have an electrician check any wet fittings
If the leak turns out to be condensation, the report says so, and suggest how the roof space could be better ventilated. It saves chasing a leak that is not there.
Plan a roof survey every few years. Flashings, valleys and flat roof details are frequent weak points, and catching wear early keeps water out.
Common roof problems in Knockholt
Many leaks begin at a flashing. Where a roof meets a chimney, a wall or a dormer, lead or mortar seals the joint. When lead lifts or splits, or a mortar fillet cracks, rain runs straight in.
A survey can pick up problems like:
- Damp underlay across a wide area
- Damp walls below an overflowing gutter
- Damp patches next to the stack
- Wet patches on loft insulation
For an older house near a landmark like St Katharine's Church, lead flashings, valleys and old chimneys are typical places for water to get in.
Before booking any roof surveyor
- Which parts of the roof they’ll actually see
- What follow-up you get after the report
- How soon the report will arrive
- How long they’ve been surveying roofs
Common questions in Knockholt
Is Knockholt within the area you cover?
Yes. Knockholt is within the area we cover, which takes in towns, villages and rural addresses. Our area covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How do I find out if my home in Knockholt is listed?
You can check whether a building is listed on Historic England’s list, and your council can tell you if it’s in a conservation area. If a home is listed, changes that affect its special interest need listed building consent, and in a conservation area re-roofing in different materials may need permission.
When does the report arrive?
The Premium Survey report comes the same day, the Standard within 24–48 hours and the Basic within 48 hours. All of them come by email, ready to forward.
Will you photograph what you find?
Yes, every report has them. Pictures sit next to the findings they show.
How do you tell a leak from condensation?
It’s a common question. Leaks tend to follow wet weather and show in one place, while condensation is often spread out and worse in cold weather. The report explains which it looks like and what to do.
Do I have to be there for the survey?
Not necessarily. If we only need the outside, we can agree that ahead of time, but the loft and any rooms with damp need someone to let us in.
Will you go up on the roof?
Only if it’s safe. We inspect whatever is safely visible: from ground level, from windows and vantage points, from the roof space, from the roof itself where safe and by drone where applicable. The report says if anything couldn’t be seen.
Leave it or get it looked at?
Damp loft insulation loses much of its value. Insulation can soak up water quietly before anything shows below. The sooner the cause is found, the less needs replacing. Matching old materials, such as handmade tiles or stone slates, can take time to source. Spotting a problem early leaves room to find them.
Simple, low roofs take less time to survey than tall or complicated ones, and the package matters as well. We will give you the figure before anything is booked.
Why book with us
- Customer satisfaction of 98%
- Surveys on weekdays, Saturdays and Sundays
- Thermal imaging and drone inspection where they help
- 5,000+ surveys completed
What you can safely check yourself
You can learn a lot from the ground. Binoculars help you spot slipped slates or tiles, gaps along the ridge and a leaning stack. Please don’t climb up for a closer look.
A DIY look is useful, but it isn’t a survey. You will not see flashings, valleys or the backs of chimneys properly from ground level.