Hertfordshire · England
Remedial Sealant in Colney Heath
Removing failed, mouldy or leaking sealant and putting it right for Colney Heath, backed by a one-year guarantee. Call for a quick quote.
- Over-sealed joints coming away
- Products that weren’t meant for the joint
- Thick, messy sealant smeared over tiles
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Remedial sealant for homes and businesses in Colney Heath
Movement and expansion joints fail when the sealant can’t stretch. We cut out the failed sealant and set the depth with backing, before resealing with a flexible product suited to the movement. We work on failed movement joints, leaking tray & enclosure joints and mouldy bath & shower sealant, and people most often call us about dark patches showing through the sealant and decorators’ caulk around a bath or shower.
Being in a small place like Colney Heath makes no difference to the job itself: the journey and access are simply agreed in advance. Once we’re there, the bathroom or kitchen gets the same care as anywhere else.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Colney Heath (AL4)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How the visit works
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours for most joints, depending on how much old sealant has to come out for a typical job. For a village or hamlet like Colney Heath, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking the joint for movement, leaks and the reason it failed.
- All the old sealant comes out, including any layers underneath.
- We clean the joint, treat any mould and let it dry.
- We use the right backing and sealant for any joint that moves.
- We tool the joint and tell you about anything else that needs attention.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
- Mention any parking rules near the property
Get a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job.
Related advice
Common questions in Colney Heath
Is it worth replacing old sealant in an older home in Colney Heath?
In most cases, yes, if it hasn’t been done for a while. Sealant is a maintenance item: how long it lasts depends on use, cleaning and exposure.
Do you work in hotels near Colney Heath?
Yes, hospitality work, including hotels, is part of what we do. Jobs can be programmed room by room, with out-of-hours working possible to arrange.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can failed expansion joints be resealed?
Yes. Backing sets the depth and stops the sealant sticking to the back.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Can you remove old sealant without damaging the bath?
Yes. We take our time over removal, particularly on softer surfaces like acrylic.
When something else is needed
A few problems are outside what sealant work can do:
- Cracks in the fitting rather than the joint
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A bath, tray or worktop that moves until it’s properly fixed
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Failed movement joints
- Botched or over-sealed joints
- Expansion joints
- Mouldy bath & shower sealant
- Leaking tray & enclosure joints
- Shrunken worktop sealant
Quotes for remedial sealant in Colney Heath
We do not publish a price list. What we look at:
- Any mould that needs treating
- Working hours on commercial sites
- Whether the work is at height
- Which sealant suits the joint
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
When you call or email, these details help:
- If someone has resealed it before
- Where the property is
- Roughly how big the job is
- Any access issues, like height or stairs
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Do you need remedial sealant in Colney Heath?
A lot of failed joints have been sealed over rather than replaced. New silicone cannot stick to the old bead, so the new layer peels, and damp and mould settle between them.
The most common problems we see are:
- Floor or wall movement joints that have failed
- Black mould underneath the bead
- Repeat leaks from the same joint
- Kitchen joints letting water behind the worktop
If you look after a building such as Colney Heath Junior Mixed Infant and Nursery School, washroom and kitchen sealant there needs the same care as at home, and schools and businesses are part of our work as well as homes.
Before booking anyone
- How long the guarantee is
- Whether they’re fully insured
- How the surfaces are prepared before sealing
- Whether you can choose the colour
Places near Colney Heath
Also in Colney Heath
Keeping the joints in good condition
After the cure time, these simple habits help:
- Check ceilings under showers for marks
- Never seal over old silicone
- Find out why the sealant failed first
- Keep movement joints clear of mortar and paint
Watch the joint over the first few weeks, particularly where the original failure was caused by movement. Should anything change, phone 0345 464 0079 or send us an email.
A failing joint rarely gets better on its own. Every shower or downpour sends more water through, into floors, walls or ceilings. Early action keeps it to a sealant job.
What the job involves on each surface
Mouldy bath & shower sealant
Repeat mould usually points to a damp, poorly aired room. Along with resealing, we’ll mention if the room needs better ventilation.
Leaking trays & enclosures
When failed joints are the cause, they’re all cut out and renewed, including the screen profile and tray edges.
Remedial sealant around Colney Heath
Colney Heath is part of Hatfield, one of the post-war new towns. With many homes dating from the post-war decades, plenty of bathrooms have been resealed or refitted more than once. Sealant laid over old sealant never bonds properly, so it all has to come out. There are hotels and other places to stay in and around Colney Heath. As well as homes, we work in hotel bathrooms, where resealing and regrouting can be done room by room.
Letting a property close to Welham Green station? Then a joint that keeps failing is best fixed properly while the property is empty. For an older house near a landmark such as Church of St Mark, walls and floors in older homes can move, and sealant and grout show it first.
Colney Heath is about 2 miles south-west of Hatfield, in Hertfordshire. Colney Heath gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Colney Heath is one of 381 towns and villages in Hertfordshire we cover. Our London page covers work nearby.
Work in AL4 is quoted and booked the same way as anywhere else. If you need remedial sealant at a property on High Street, Fair View and Roestock Lane or anywhere close by, our applicators can take on the job. We also cover Sleapshyde (1 mile north-west), Welham Green (1 mile east), Smallford (1 mile north-west), Hatfield (2 miles north-east) and Tyttenhanger (2 miles west). Further out, we also cover Watford (8 miles south-west), Hemel Hempstead (9 miles west), Stevenage (12 miles north), St Albans (3 miles west), Welwyn Garden City (5 miles north-east) and Harpenden (7 miles north-west).
Landmarks near Colney Heath
Locally, jobs take us to homes and businesses close to Chalkdrawers Arms, Bishop's Hatfield Girls' School and North Mimms Park. The closest station to Colney Heath is Welham Green station, about 1.7 miles east of the centre. A little further out are Hill End Hospital (2.3 miles west) and The Bunker at Hatfield Police Station (1.9 miles north). Not far away are Verulamium Lake and Colney Heath Local Nature Reserve.