Hertfordshire · London and the South East
North Mymms Roof Leak Investigation
Roof leak investigations in North Mymms, with over 20 years’ experience behind it. You get a clear report with photographs.
- Water marks that spread in wet weather
- Water that shows only in certain storms
- Leaks at a dormer or roof window
Roof leak investigation in North Mymms
A leak that comes and goes can be the hardest to pin down. Driving rain from one direction, melting snow or a gutter that overflows in a downpour can all set it off. Telling us when it happens helps a lot, along with any photos you’ve taken. We look for the clues it leaves behind, such as tide marks, stained timbers and damp underlay. Moisture readings show where materials are still wet. We are often asked to look into condensation that looks like a leak and ceiling stains that grow after rain, on rooflights and dormers, flat roof details and valleys and parapet gutters.
Many homes in small places like North Mymms face open ground, where storms hit ridges, verges and chimneys hardest. Damp in old stone, brick or timber walls is slow to dry out, 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. You’ll know exactly what was inspected and what wasn’t.
- Location
- North Mymms (AL9)
- Region
- Hertfordshire
- Price
- From £150 inc. VAT
- Your report
- A written report with photos, by email
- Survey days
- Monday to Sunday, daytime
- Insurance
- Professional indemnity and public liability
- Call
- 07833 053749
- Updated
- 27 October 2026
What we do, step by step
We look at the roof from outside and, where it’s relevant and there is safe access, from inside the roof space too. In the loft, the signs we look for are staining, damp, daylight and sagging. The whole visit typically takes an hour or two for most houses, with bigger or more complicated roofs taking longer. Somewhere like North Mymms needs a little journey planning: let us know about lanes, gates and parking. The roof is looked at from the ground, from windows, from the loft where there is safe access and from the roof where it’s safe.
- You tell us where the water appears, when, and what the weather was doing.
- We examine the damp area and the rooms near it.
- From the loft space, we trace the water’s route where there’s safe access.
- 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
- Leave side gates unlocked
- Have any questions written down, so nothing gets missed
- Note where any stains or damp appear
How to book
For a price for roof leak investigations in North Mymms, ring 07833 053749 or drop us an email. The address, the type of property and what you need to know help us give you an accurate price.
Read more
When you need someone else
This is not a RICS building survey, a structural engineer’s report or an asbestos survey. It also has these limits:
- Plumbing leaks that look like roof leaks
- Putting the leak right
- A promise to find every leak on a single visit
If in doubt, phone 07833 053749 or drop us an email and we’ll point you to the right survey before booking. What a survey covers and doesn’t.
What we check
- The roof space
- Rooflights and dormers
- Flat roof details
- Valleys and parapet gutters
- Chimney stacks
- Slate and tile slopes
- Lead flashings
Why it is worth a survey now in North Mymms
Leaks tend to get worse, not better. Each storm can open a gap a little more. An investigation now gives you time to plan the work. Where a roof is exposed, as many are in small places like North Mymms, driving rain gets into any weakness, and damp in older walls is slow to dry out.
Prices start from £150, including VAT. The final price depends on the size and height of the roof, access and the package you choose.
Why book with us
- Satisfaction rate of 98%
- An independent look at the roof
- Surveys on weekdays and at weekends
- Covered by professional indemnity and public liability insurance
Read our cost guide and our case studies.
Roof leak investigations in North Mymms: local notes
Wyllyotts Manor, about 2 miles south-east, is one of the historic houses in the wider area around North Mymms. Older homes in the wider area frequently have features worth a closer look, such as lead valleys, tall stacks and roofs that have been patched over the years, and any change of roofing material on a listed home needs checking with the council first. Slate and clay tile are the usual coverings on older South East houses, with concrete tiles on many later estates, with flat-roofed extensions, dormers and garages common everywhere. The covering and its details give the first clues when tracing where water is coming from.
Take a building like Brookmans Park Primary School: on a building that size, finding the source of a drip means looking well beyond the stain. Landlords with a home close to Brookmans Park station may find that a tenant living with a leak needs the cause found, not just the stain painted over.
North Mymms is about 2 miles north-west of Potters Bar, in Hertfordshire. We provide roof leak investigations for homes and businesses in North Mymms and nearby. Our Hertfordshire coverage includes North Mymms. London is in our area too.
We survey roofs across the AL9 postcode area for roof leak investigations. Streets in the area include St Mary's Church Road, Abdale Lane and Warrengate Road. We also cover Welham Green (1 mile north), Colney Heath (2 miles north-west), Sleapshyde (3 miles north-west), Hatfield (3 miles north) and Shenleybury (3 miles west). Larger places within reach include Watford (9 miles south-west), Hemel Hempstead (11 miles west), Stevenage (13 miles north), St Albans (5 miles north-west), Welwyn Garden City (6 miles north) and Harpenden (9 miles north-west).
Near you in North Mymms
Locally, jobs take us to homes and businesses close to Chancellor's School, North Mimms Park and The Old Maypole Public House and the streets around them. The nearest railway station is Brookmans Park station, about 0.7 miles east of the centre. Other landmarks nearby include Shenley Hospital (3.5 miles south-west) and Potters Bar Museum (2 miles south-east). Green spaces nearby include Furzefield Wood and Lower Halfpenny.
Questions from North Mymms
Does a conservation area affect roof work in North Mymms?
We cannot confirm that for you, but Historic England’s list and your council can. Both listing and conservation areas can limit changes of roofing material, and councils can also use Article 4 directions.
Do you cover smaller places like North Mymms?
Yes, we do. We cover the whole of London and South East England, and smaller places are part of that. The journey is planned ahead, so it is useful to know about access.
How experienced are you?
We’ve been surveying roofs for over 20 years and have carried out more than 5,000 surveys.
Is it the same as a RICS Level 2 or Level 3 survey?
No. This is a survey of the roof only, and it isn’t a RICS Level 2 or Level 3 survey. It can sit alongside a RICS survey if you want both.
Do you carry out surveys on Saturdays and Sundays?
Surveys run on weekdays and at weekends. To arrange a date, call 07833 053749 or email us.
Why doesn’t the damp patch line up with the hole?
Because water travels. It runs along rafters, battens or underlay before it drips, so the stain may be some distance from where it gets in. That is why we trace the route rather than patching above the stain.
How do you tell a leak from condensation?
Many apparent leaks turn out to be condensation. Leaks tend to follow wet weather and show in one place, while condensation is often spread out and worse in cold weather. We tell you which it is most likely to be.
Checking the roof from the ground
During heavy rain, look at the gutters from ground level or a window. Water spilling over the edge can point to a blockage or a sagging run.
After heavy rain, check ceilings and the tops of walls for new stains. Take a photo and write down when you saw it, which helps when we check the roof.
Prices for roof leak investigations in North Mymms
Every roof is different, so prices are confirmed before booking. This is what makes a difference:
- The shape of the roof and its details
- House, block, shop or office
- Extra roofs, like extensions, dormers or garages
- If the survey needs thermal imaging or a drone
Simple, low roofs take less time to survey than tall or complicated ones, and the package you pick makes a difference too. The price is always agreed first.
Helping us price your survey
To price your survey accurately, we’ll ask about:
- Any marks or damp showing indoors
- Your timetable, such as an exchange date
- What made you get in touch
- The kind of building and roof involved
Photos help, if you have them. Take them safely from ground level or a window. To get started, ring 07833 053749 or send us an email.
What we’re asked to look at in North Mymms
Flat roofs fail with age and wear. A felt roof often lasts around 15 to 20 years, and as it ages it splits, blisters and opens at the laps. Leaks frequently start at the edges, upstands and outlets.
Things that often lead to a survey include:
- Wet patches high on an inside wall
- Water marks that spread in wet weather
- Condensation that looks like a leak
- Water through the ceiling under a flat roof
Trees in and around North Mimms Park shed leaves that can end up in nearby gutters, and blocked gutters overflow and soak walls.
Before you book anyone
- What follow-up you get after the report
- What experience they bring
- How they plan to inspect the roof safely
- Will they check the loft as well as the outside?