Hertfordshire · England
Remedial sealant & repairs in Green Street, Hertfordshire
Problem with your failed sealant joints in Green Street? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Thick, messy sealant smeared over tiles
- Black mould underneath the bead
- Sealant peeling off a dusty or damp surface
Remedial sealant around Green Street
Hard water is the norm across most of the South East, which leaves limescale on sealant, grout and fittings, and it has to be cleaned off before new sealant goes in.
Homes close to St Michael and All Angels Church include some older properties, and older homes can move a little, which is hard on rigid grout and tired sealant. If you look after a building such as Parkside Community Primary School, we reseal washrooms and kitchens in schools and businesses as well as homes.
Green Street is about 1 mile north of Borehamwood, in Hertfordshire. Whether you are in the middle of Green Street or further out, remedial sealant is available for homes and businesses alike. 381 places in Hertfordshire are on our list, large and small. We also work in London, about 14 miles from Green Street.
All of WD6 is covered for remedial sealant, from the main roads to the quietest streets. Remedial sealant is available to properties on Stapleton Road, Green Street and Cowley Hill and the roads around them. If you are just outside Green Street, we cover Well End (1 mile south-east), Borehamwood (1 mile south), Shenley (1 mile north-west), Ridge (2 miles north-east) and Rowley Green (2 miles south-east). We also work in nearby towns such as Watford (5 miles west), Hemel Hempstead (10 miles north-west), St Albans (6 miles north-west), Welwyn Garden City (9 miles north), Harpenden (10 miles north) and Hoddesdon (12 miles north-east).
What’s near Green Street
Typical jobs here are in homes near The White Horse Public House and Hertswood Academy and the streets around them. The nearest railway station is Elstree & Borehamwood station, roughly 1.6 miles south. Other landmarks nearby include Hilfield Castle (3 miles south-west) and Shenley Hospital (1.6 miles north-west). Open spaces near Green Street include Darland's Lake and Arkley Lane and Pastures.
Remedial sealant in Green Street, done properly
A joint that keeps failing normally has a reason. Movement, the wrong product or a leak from somewhere else will defeat even a perfect bead. We look for the cause before we reseal. We are often asked to deal with leaks that keep coming back after resealing and mould trapped under a layer of silicone, across leaking tray & enclosure joints, failed movement joints and botched or over-sealed joints.
Around Green Street, it’s houses and cottages rather than flats. The work is the same as anywhere: everything old comes out before the new sealant or grout goes in.
You get a one-year guarantee, the same in Green Street as everywhere else we work.
- Where
- Green Street (WD6)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Green Street
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We work for letting agents and landlords as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
FAQs for Green Street
Do you cover smaller places like Green Street?
Yes. Green Street is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Elstree & Borehamwood station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Where are you based?
Mr Mastic is based in Crawley. We cover Green Street and the rest of Hertfordshire.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
When to call us in Green Street
Joint depth matters. A bead bonded on three sides, or laid too thick, cannot flex, and tears at the first real movement. Backing rod or bond-breaker tape prevents it.
Signs it’s time to call us include:
- Products that weren’t meant for the joint
- Repeat leaks from the same joint
- Sealant peeling off a dusty or damp surface
- Torn expansion joints
Rented homes near Elstree & Borehamwood station change hands often, and a joint that keeps failing is best fixed properly while the property is empty.
Questions to ask before you book
- What insurance they hold
- What the quote includes, VAT included or not
- What happens if the job turns out different
- What the cure time is
What we can’t put right
Before you book, it’s worth knowing the limits:
- Failed tanking or loose tiles behind the sealant
- Leaks from a shower valve, waste or pipework (a plumber’s job)
- A tray or bath that is cracked
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Green Street
- Mouldy bath & shower sealant
- Expansion joints
- Shrunken worktop sealant
- Botched or over-sealed joints
- Leaking tray & enclosure joints
- Failed movement joints
Also near Green Street
What else we do in Green Street
How to look after the new joints
Aftercare is simple:
- Keep the room well ventilated
- Never fill a movement joint with mortar or grout
- Look for stains below bathrooms now and then
- Do not add new sealant on top of old
If the joint ever needs renewing, have it cut out, not sealed over. Over-sealing is how many remedial jobs start, so the old bead should always come out first.
If a joint has failed more than once, stop resealing it. Get the cause found first, otherwise the next attempt will fail too.
Leave it or put it right?
Remedial work takes longer than a straight reseal, but not by much: the work takes a few hours for most joints, depending on how much old sealant has to come out. Compared with chasing the same leak every few months, it’s time well spent. Around Green Street, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why book with us
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- We leave the area clean and tidy
- We agree the colour with you first
See what affects the cost and what customers say.
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours for a typical bath or shower, longer where several layers have been applied. Somewhere as small as Green Street, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at how the sealant has failed and check for movement or a leak path.
- We strip the joint completely, removing any layers below.
- We clean the joint, treat any mould and let it dry.
- Moving joints get backing and a flexible sealant to suit.
- Finally we finish the joint and talk you through what we found.
Preparing for the visit
- Mention any tricky access
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
Get a quote
Want a quote for remedial sealant? Please ring 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and send you a clear quote before we start.
Read more
Different surfaces, different methods
Leaking trays & enclosures
When failed joints are the cause, they’re all cut out and renewed, including the screen profile and tray edges.
Mouldy bath & shower sealant
Mould often spreads under the bead as well as through it. We treat the exposed joint once the bead is out so the new sealant starts clean.