Hertfordshire · London and the South East
Roof Leak Investigation in How Wood
Get a clear view of the leaking roof at a property in How Wood from an independent roof surveyor. We visit on weekdays and at weekends.
- Wet patches high on an inside wall
- Damp ceilings under a flat roof
- A leak that comes and goes with the weather
How a roof leak investigation works in How Wood
Moisture readings and thermal imaging are used where they’re useful. Moisture detection confirms where timbers, plaster or insulation are damp. A thermal camera shows patterns of temperature rather than water, so its findings are checked with moisture readings. Moisture detection is included in the Standard Survey, and thermal imaging in Premium. The best thermal results come after a sunny day, with a dry roof and little wind. We are often asked to look into staining around the chimney inside and wet patches on loft insulation, across flat roof details, rooflights and dormers and slate and tile slopes.
Houses in smaller places like How Wood can stand more in the open, where driving rain gets into any gap at a ridge, verge or flashing. If a leak shows only when the wind is in a certain direction, that is a useful clue. Let us know when it happens when you contact us. The gutters on the most exposed side can overflow too.
Findings are set out part by part, from the coverings down to the gutters. It records what’s sound as well as what is not.
- Place
- How Wood (AL2)
- Region
- Hertfordshire
- Cost
- From £150 inc. VAT
- Report
- Emailed report with photos and recommendations
- Appointments
- Monday to Sunday, daytime
- Cover
- PI and public liability insurance
- Phone
- 07833 053749
- Page updated
- 27 October 2026
Do you need a roof leak investigation in How Wood?
When a slate slips or a tile cracks, the underlay takes the water. Ageing felt underlay eventually tears and lets water through, and very old roofs may have no underlay at all. Corroded nails, known as ‘nail fatigue’, are a frequent cause on slate roofs.
Here are some of the things we see often:
- A leak that comes and goes with the weather
- Damp ceilings under a flat roof
- Stains around a skylight
- Damp patches next to the stack
Take a building like How Wood Primary and Nursery School: tracing a leak on a big roof starts with where the water appears and works back.
Questions to ask before booking
- Whether they hold professional indemnity and public liability insurance
- Which viewpoints they use to see the roof
- What’s outside the scope of the survey
- Is there a chance to talk the report through?
What you can safely check yourself
Fresh stains on ceilings or walls after rain are worth noting. Take a photo and write down when you saw it.
A lot can be seen from ground level. With binoculars, look for slipped or missing slates and tiles, gaps along the ridge and leaning chimneys. Never climb onto the roof to look.
The survey, step by step
The visit has one job: to look at the leaking roof as closely as is safe and record what we find. Everything we note and photograph goes into the written report. The visit usually takes between one and two hours, more where the leak is intermittent or the roof is large. For a survey in How Wood, we agree the time, the access and parking before the day. Weekday and weekend visits are both possible. Let us know about any garages, outbuildings or extensions you want included.
- We help you choose the package that suits the leak.
- We agree a date, including weekends.
- The investigation works from the stain back to the roof.
- Where it’s useful and included, we take moisture readings and use thermal imaging.
- You get photos, the likely cause and clear recommendations.
Before we arrive
- Check the loft hatch can be reached
- Point out any leaks or damp patches
- Tell us about parking before the day
How to book
Getting a price is simple: just phone 07833 053749 or send us an email, let us know about the property and we’ll suggest the right survey. The price is agreed up front.
Related advice
Rented homes, blocks and businesses
Surveys can also be booked by buyers’ agents acting for a client. Reports are emailed, so they’re easy to pass on.
With a portfolio of properties, surveys can be booked for more than one address. To discuss a number of properties, phone 07833 053749 or use the contact form with the addresses.
When you need someone else
Our survey is not a RICS Level 2 or Level 3 survey, a structural engineer’s report or an asbestos survey. Other limits to bear in mind:
- Structural calculations (that is a structural engineer’s job)
- The repair itself (the investigation finds and reports the cause)
- Leaks from plumbing, tanks or pipework rather than the roof
If in doubt, call 07833 053749 or drop us an email and we’ll point you to the right survey. The full list of what we check.
Roof types and parts we check
- The roof space
- Lead flashings
- Valleys and parapet gutters
- Slate and tile slopes
- Rooflights and dormers
- Flat roof details
- Chimney stacks
Nearby places to How Wood
Other services in How Wood
How Wood questions
Will you come out to How Wood?
Yes. How Wood is within the area we cover, which takes in towns, villages and rural addresses. We survey roofs across London and the South East. Just mention lanes, gates or anything else about the route when booking.
Do you carry out roof surveys in How Wood?
Yes. We work right across London and South East England, and How Wood is part of that. Just phone 07833 053749 or send us an email and let us know about the property, and we will talk through which survey suits.
Are you insured?
Every survey is covered by professional indemnity and public liability insurance.
Can you trace a leak in dry weather?
Frequently, yes. Stains, tide marks, damp timbers and moisture readings typically point the way. Intermittent leaks can be harder, so photos and notes from when it leaks help a lot.
Does this replace a RICS home survey?
No. It is a specialist roof survey, not a RICS Level 2 or Level 3 building survey. It focuses on the roof, so it sits alongside a building survey rather than replacing it.
How do you tell a leak from condensation?
Many apparent leaks turn out to be condensation. A leak usually shows in one area and follows rain, while condensation is frequently spread out and worse in cold weather. We tell you which it is most likely to be.
How fast do I get the report?
That depends on the survey you book: the Basic Survey report arrives within 48 hours, the Standard Survey in 24 to 48 hours and the Premium Survey the same day. Reports are sent by email.
What a roof leak investigation looks like in How Wood
With High Elms Manor about 2.2 miles south-west, How Wood sits in an area with a long building history. If yours is one of the older homes, expect a mix of original materials and later repairs on the roof, and any change of roofing material on a listed home needs checking with the council first. In this part of the South East, older roofs are mostly slate or clay tile and many newer ones concrete tile, with flat-roofed extensions, dormers and garages common everywhere. Knowing the roof type helps narrow down where water may be getting in.
If you own one of the older houses in the streets near Church of the Holy Trinity, lead flashings, valleys and old chimneys are typical places for water to get in. If you run a business near Village Arcade St Albans, finding where water is getting in quickly keeps disruption down.
How Wood is about 2 miles south-west of St Albans, in Hertfordshire. We cover How Wood and the rest of Hertfordshire. We cover towns and villages across Hertfordshire, from the larger towns to small villages. London is in our area too.
Every address in AL2 is within our area for roof leak investigations, from the main roads to the quietest streets. We cover properties on Ringway Road, Alder Close and How Wood. Other places close to How Wood include Park Street (1 mile north-east), Chiswell Green (1 mile north-west), Frogmore (1 mile east), Bricket Wood (1 mile south-west) and Colney Street (1 mile south-east). Within a short drive, we also cover Watford (4 miles south-west), Hemel Hempstead (5 miles north-west), Stevenage (15 miles north-east), Welwyn Garden City (9 miles north-east), Harpenden (7 miles north) and Hoddesdon (15 miles east).
Around How Wood
In How Wood, that means homes and buildings near Marlborough Science Academy and The Falcon pub, among other places. How Wood has its own railway station: How Wood station. Nearby you will also find Hilfield Castle (4.6 miles south) and Hypocaust Museum (2.1 miles north). The countryside around How Wood includes Broad Colney Lakes and Verulamium Lake.
Before and after the survey
Here are a few things we’d tell any owner:
- Take dated photos of the leak
- Let us know what has already been tried
- Don’t touch fittings that water is reaching
- Note the weather when the leak shows
Standard includes a follow-up consultation to talk the findings through, and Premium includes an in-person consultation. You can ask us about anything that isn’t clear.
Have leaves and moss cleared from gutters, valleys and outlets, particularly in autumn. Blocked outlets on parapet and flat roofs cause many leaks. Leave the clearing to someone with the right equipment.