Buckinghamshire · England
New Build Mastic in Gerrards Cross
Problem with your new-build sealant joints in Gerrards Cross? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Second-fix sealing on new plots
- Sealant applied over dusty or wet surfaces
- Skirting joints opening in the first winter
How we handle new build mastic in Gerrards Cross
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. In both, preparation makes the difference since hurried prep is behind a lot of new-build failures. We work on plot handovers, skirting & floors and bathrooms & en suites, and the jobs we see most are gaps opening as the house dries out and settles and new-build shower sealant that has already split.
In and around Gerrards Cross, floors range from older timber boards to tiles and newer finishes, each moving in its own way. Skirting and threshold joints need a sealant that suits the floor.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Gerrards Cross (SL9)
- Wider area
- Buckinghamshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
New build mastic around Gerrards Cross
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Gerrards Cross, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. For new homes near Gerrards Cross station, it’s worth checking the sealant early, while snags are still fresh.
Gerrards Cross is about 5 miles north-east of Slough, in Buckinghamshire. Every kind of property in Gerrards Cross is covered for new build mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 263 places across Buckinghamshire. You can also see our page for Reading, roughly 20 miles from Gerrards Cross.
Postcode districts we cover here for new build mastic: SL9. New build mastic is available to properties on Station Road, East Common and Oxford Road and the roads around them. Main roads around Gerrards Cross include the A40 and A413, which makes travel easy. If you’re just outside Gerrards Cross, we cover Tatling End (1 mile south-east), Fulmer (1 mile south), Hedgerley Green (2 miles west), Higher Denham (2 miles east) and Baker's Wood (2 miles east). We also work in nearby towns such as High Wycombe (9 miles west), Chesham (9 miles north), Marlow (9 miles west), Amersham (7 miles north), Beaconsfield (4 miles north-west) and Princes Risborough (15 miles north-west).
Around Gerrards Cross
We work in homes and buildings around St Mary's School, The Chalfonts Community College and Bulstrode Park and the streets around them. Gerrards Cross has its own railway station: Gerrards Cross station. Well-known places in the area include Chiltern Open Air Museum (3.8 miles north) and Chalfonts and Gerrards Cross Hospital (1.7 miles north). The countryside around Gerrards Cross includes Horse Shoe Bay and Church Wood.
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Movement caused by a poorly fitted tray or bath
- Disputes or warranty claims with your builder
- Leaking fittings rather than failed sealant
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Kitchens
- Show homes
- Bathrooms & en suites
- Windows & doors
- Plot handovers
- Skirting & floors
Quotes for new build mastic in Gerrards Cross
Call for a quick quote. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- How many areas need sealing
- The size of the job
- Access and height
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Helping us quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- If someone has resealed it before
- Where the job is, and your postcode
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or send us an email with the details.
Aftercare tips
To keep the joints looking good and working properly:
- Open a window or run the fan after bathing
- Resist patching a failed seal with a tube from the DIY shop
- Keep pictures and emails about snagging items
- Do not wait for the house to settle if water is getting through
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries and can be resealed later.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in keeps the job straightforward.
How it works
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and tidy away. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a job in Gerrards Cross, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Get a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Advice
Places near Gerrards Cross
More services for Gerrards Cross
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
FAQs for Gerrards Cross
Can you help a landlord with a rental near Gerrards Cross station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover smaller places like Gerrards Cross?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early. Rushed application on dusty surfaces makes it worse.
What does new build mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before work begins.
How long does the job take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Larger jobs naturally take longer.
Is there any odour?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Leave it or put it right?
A quick bead over the top of the old sealant can look fine at first, but it will not bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. In a smaller place like Gerrards Cross, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Gerrards Cross
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
- White, clear, grey or coloured to suit, where the product allows
- Fully insured
Read what affects the cost and customer reviews.
What the job involves on each surface
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.