Windsor and Maidenhead · England
New-build mastic & snagging in Brookside, Windsor and Maidenhead
Problem with your new-build sealant joints in Brookside? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Worktop and upstand sealant coming away
- Cracks appearing as a new home settles
- Sealant applied over dusty or wet surfaces
New build mastic for homes and businesses in Brookside
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. Both get the same care over preparation, because that is what rushed new-build sealant usually lacks. We work on plot handovers, show homes and kitchens, and people most often call us about messy sealant that spoils new finishes and skirting joints opening in the first winter.
In a village or hamlet like Brookside, new homes are more likely to be a barn conversion or a handful of houses than a big estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
All our work is covered by a 12-month guarantee, wherever you are in Windsor and Maidenhead.
- Place
- Brookside (SL5, SL4)
- Wider area
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Towns and villages near Brookside
Also in Brookside
What affects the quote in Brookside
We do not publish a price list. What we look at:
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- Working hours on commercial sites
The cost reflects the work involved, not guesswork. That’s why we ask about the job first.
Helping us quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- Where the property is
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We will send you a clear quote before any work starts.
Brookside questions
Can you do new build mastic in Brookside?
Yes. We work across London and the South East, and Brookside is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing.
Do you cover smaller places like Brookside?
Yes, Brookside is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Will you just run a new bead over the existing one?
No. We always remove the existing bead, the joint cleaned and primed where needed, and a new bead applied.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Brookside.
Is it normal for sealant to crack in a new home?
Cracking in the first couple of years is common. Poor preparation at handover adds to it.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Avoid running a DIY bead over the old one
- Raise failed sealant with the developer while you’re covered
- Act quickly if a seal starts to leak
- Record problems with dated pictures
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small.
How the job changes by surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
Plot handovers
Developers can send the plot schedule and specification for a quote. Sealant work across the plot is covered to the agreed spec.
Joints and finishes in Brookside homes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Ascot station, the sealant around baths, showers and frames is worth checking in the first year or two.
Brookside is about 3 miles east of Wick Hill, in Windsor and Maidenhead. Wherever you are in the SL5 postcode area, we cover new build mastic for homes and businesses. Our area takes in 57 places across Windsor and Maidenhead. Our Reading page covers work nearby, about 13 miles away.
Here we cover the SL5 and SL4 postcode area for new build mastic. That includes homes and businesses on New Road, The Avenue and Coach Road and the roads around them. Close by, we work in North Ascot (1 mile south-west), Plaistow Green (1 mile north), Woodside (1 mile north-east), Ascot (1 mile south-east) and Winkfield (1 mile north-west). Further out, we also cover Maidenhead (7 miles north), Windsor (4 miles north-east), Boyn Hill (6 miles north-west), Cookham (9 miles north), Furze Platt (8 miles north) and Dedworth (4 miles north).
Landmarks near Brookside
We work in homes and buildings around Ascot Heath Church of England Junior School and Royal Hunt pub. The closest station to Brookside is Ascot station, roughly 1.3 miles south. Well-known places in the area include Heatherwood Hospital (1 mile south) and The Lexicon (3 miles west). The countryside around Brookside includes Virginia Water Lake.
Common problems we fix in Brookside
Not every new-build joint gets the right sealant: caulk where water collects, or a rigid product on a moving joint. Both fail early.
These are the problems we’re asked about most:
- Gaps opening as the house dries out and settles
- New-build shower sealant that has already split
- Second-fix sealing on new plots
- Messy sealant that spoils new finishes
In and around Brookside, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- Who turns up on the day
- What guarantee comes with the work
- How the surfaces are prepared before sealing
- Whether you can choose the colour
Why act early in Brookside
Running a new bead over the builder’s sealant might look tidy for a few weeks, 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. Around Brookside, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in Brookside
- Quality sealants from Arbo and Everbuild
- Over 20 years’ experience
- Anti-fungal sanitary silicone in wet areas
- White, clear, grey or coloured to suit, where the product allows
Read our cost guide or what customers say.
What happens on the day
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for most snagging lists, longer for a run of plots from start to finish. Somewhere like Brookside needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- We check every joint and tell you how long each needs to cure.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.