Hertfordshire · England
Remedial sealant & repairs in Broad Colney, Hertfordshire
Removing failed, mouldy or leaking sealant and putting it right for homeowners, landlords and businesses in Broad Colney. Fully insured, ARBOMaster approved and guaranteed for a year.
- A shower that leaks however often it’s resealed
- Black mould underneath the bead
- Sealant applied over old sealant that has lifted
How to look after the new joints
After the cure time, these simple habits help:
- Find out why the sealant failed first
- Never seal over old silicone
- Run the fan after every shower
- Use a soft cloth, not a scourer, on silicone
Go easy on the new sealant: no scraping, scouring pads or harsh chemicals.
Mould under a second layer of sealant keeps growing out of sight. By the time it shows through, the joint is well past saving.
Remedial sealant for homes and businesses in Broad Colney
Remedial work is what we do when sealant has failed or been done badly. Silicone laid over silicone, smears across tiles, the wrong product in a moving joint or mould trapped underneath all need stripping out before the joint can be done properly. If you’re dealing with kitchen joints letting water behind the worktop and wide, uneven beads that look worse than the old ones, we can put it right.
For a small place like Broad Colney, remedial sealant is planned like any other job: it just means planning the journey and access beforehand. In the bathroom or kitchen, the work is the same as in any town.
All of our work is guaranteed for twelve months, in Broad Colney and everywhere else we cover.
- Where
- Broad Colney (AL2)
- Wider area
- Hertfordshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and tidy away. It generally takes a few hours, depending on how many layers have to come out. For a village or hamlet like Broad Colney, 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 look at how the sealant has failed and check for movement or a leak path.
- Every layer of old sealant is cut and cleaned out.
- The joint is cleaned, treated for mould and left to dry.
- We use the right backing and sealant for any joint that moves.
- The new joint is tooled neatly and we explain anything else we found.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
If you’re in Broad Colney and need remedial sealant, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
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Broad Colney: your questions answered
Can you help a landlord with a rental near Park Street station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
Is Broad Colney within the area you cover?
Yes, Broad Colney is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can failed expansion joints be resealed?
Yes. If a joint has been filled with mortar or rigid filler, we rake it out where possible, then the joint is sealed properly.
What if the leak isn’t the sealant?
In that case, we tell you what we have found. A plumber or fitter may be needed before any new sealant goes on.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
How long will it take to strip and reseal the joint?
Allow a few hours for most joints, depending on how much old sealant has to come out. We’ll give you a timescale when we quote.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
What affects the quote in Broad Colney
The quote reflects the job in front of us. We look at:
- Whether old sealant or filler has to be cut out
- Access and height
- The type of sealant required
- Working hours on commercial sites
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Helping us quote
Before you ask for a quote, have a think about:
- The type of property
- Where the property is
- The problem you’ve noticed
- Any previous sealing or DIY work
Want a quote for remedial sealant? Please call 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before we start.
Landlords, agents and businesses in Broad Colney
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
What sealant work cannot fix
In fairness, there are a few things sealant will not fix:
- A cracked shower tray or bath (that needs repair or replacing)
- Plumbing leaks behind walls or under trays
- Failed tanking or loose tiles behind the sealant
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- Leaking tray & enclosure joints
- Shrunken worktop sealant
- Mouldy bath & shower sealant
- Failed movement joints
- Expansion joints
- Botched or over-sealed joints
Bathrooms and kitchens in Broad Colney
Hard water is the norm across most of the South East, so limescale builds up on sealant, grout and fittings.
If you let a flat or house near Park Street station, a joint that keeps failing is best fixed properly while the property is empty. Schools such as Saint Bernadette Catholic Primary School are buildings too, and 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.
Broad Colney is about 3 miles south-east of St Albans, in Hertfordshire. If you need remedial sealant in Broad Colney, please ring 0345 464 0079 or email us for a quick quote. We cover Hertfordshire from our Crawley base, Broad Colney included. Across Hertfordshire, we cover 381 places, Broad Colney among them. Our London page covers work nearby, about 17 miles away.
Jobs for remedial sealant in AL2 works the same way as everywhere else we cover. Neighbouring places we cover for remedial sealant include London Colney (1 mile north), Shenleybury (1 mile south-east), Tyttenhanger (2 miles north), Sleapshyde (3 miles north-east) and Colney Heath (3 miles north-east). Within a short drive, we also cover Watford (6 miles south-west), Hemel Hempstead (7 miles west), Stevenage (14 miles north), St Albans (3 miles north-west), Welwyn Garden City (7 miles north-east) and Harpenden (7 miles north).
Near you in Broad Colney
In Broad Colney, that means homes and buildings near The White Lion pub and Samuel Ryder Academy and the streets around them. Broad Colney’s nearest station is Park Street station, about 1.9 miles north-west. Nearby you’ll also find Hilfield Castle (4.5 miles south) and Radlett and District Museum (2.5 miles south). Not far away are Verulamium Lake and Broad Colney Lakes.
Different surfaces, different methods
Leaking trays & enclosures
A shower that leaks after resealing often has a tray that moves or an enclosure sealed on the wrong side. We check both before we reseal.
Mouldy bath & shower sealant
Where mould keeps coming back, ventilation is usually part of the cause. Along with resealing, we will mention if the room needs better ventilation.
Do you need remedial sealant in Broad Colney?
Silicone only bonds to surfaces that are clean and dry. Residue, moisture or dust left in the joint weaken the bond, and the joint starts to come away early.
Keep an eye out for these signs:
- Sealant that came away because the surface wasn’t prepared
- Smears and lumps from a botched reseal
- Sealant applied over old sealant that has lifted
- Repeat leaks from the same joint
In the older streets around Church of St Peter, bathrooms in older houses have often been refitted more than once, with sealant laid over sealant.
Before you book anyone
- Whether they seal over old material or remove it
- What preparation is included
- The length of the guarantee
- Whether they’re fully insured