Windsor and Maidenhead · England
New Build Mastic in Frogmill
Plot mastic for developers and snagging failed sealant in new homes for Frogmill, backed by a one-year guarantee. Ask us for a quote.
- Gaps behind new kitchen upstands
- Shower seals failing in the first year or two
- Sealant work across a run of new homes
Your questions about new build mastic in Frogmill
Is Frogmill within the area you cover?
Yes. Frogmill is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Henley-On-Thames station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Are you insured?
Yes, we are fully insured.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
How long will you be here?
As a guide, most jobs take a few hours for most snagging lists, longer for a run of plots. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Will you just run a new bead over the existing one?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before we start.
New build mastic in Frogmill
Snagging sealant properly means taking the failed bead out completely. Fresh silicone cannot bond to the old layer, so it all comes out before we clean, dry and reseal. Typical jobs include messy sealant that spoils new finishes and leaking shower tray seals in a new home, across kitchens, windows & doors and show homes.
Older homes in small places like Frogmill often have timber floors that move with the seasons, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Place
- Frogmill (SL6)
- Region
- Windsor and Maidenhead
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
If you manage several properties in or around Frogmill, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Why it’s worth doing now in Frogmill
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. A lasting seal starts with removing the old one completely. Older cottages and farmhouses around Frogmill can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Frogmill
- Arbo and Everbuild products
- Rated 4.9 stars on Google
- Every job guaranteed for a year
- Any old sealant cut out fully, not covered over
See our cost guide and what customers say.
Joints and finishes in Frogmill homes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Henley-On-Thames station, the sealant around baths, showers and frames is worth checking in the first year or two.
Frogmill is about 3 miles south-west of Marlow, in Windsor and Maidenhead. Anywhere in SL6, we can carry out new build mastic at your property. Our Windsor and Maidenhead coverage runs to 57 places, Frogmill among them. There’s also a page for Reading, roughly 9 miles from Frogmill.
Work in SL6 is quoted and booked the same way as anywhere else. We also cover Medmenham (1 mile north-west), Hurley (1 mile east), Danesfield (1 mile north), Bockmer End (1 mile north) and Cockpole Green (2 miles south-west). Further out, we also cover Maidenhead (4 miles east), Windsor (10 miles south-east), Boyn Hill (5 miles south-east), North Ascot (11 miles south-east), Cookham (4 miles east) and Furze Platt (4 miles east).
What’s near Frogmill
We work in homes and buildings around Black Boys Inn. The closest station to Frogmill is Henley-On-Thames station, roughly 3.1 miles west of the centre. Nearby you will also find Marlow Community Hospital (3.2 miles north-east) and Marlow Museum (2.7 miles north-east). The countryside around Frogmill includes Hurley Chalk Pit and Weycock Hill.
When to call us in Frogmill
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart.
These are the problems we are asked about most:
- Second-fix sealing on new plots
- Sealant that never bonded to the surface
- Frame joints opening as the plaster dries
- Gaps opening as the house dries out and settles
Around Frogmill, as everywhere, new build mastic is only as good as the preparation behind it.
Before booking anyone
- Whether all the old sealant comes out first
- What preparation is included
- What the cure time is
- Who does the work, and how experienced they are
Towns and villages near Frogmill
Also in Frogmill
When something else is needed
We’ll always be straight with you, so here’s what new sealant won’t do:
- Broken tiles or a split tray
- A tray or bath that is not properly supported, until it’s fixed
- Deciding who is responsible under a builder’s warranty
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Bathrooms & en suites
- Kitchens
- Windows & doors
- Show homes
- Plot handovers
- Skirting & floors
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Record problems with dated pictures
- Keep water off fresh sealant until it has cured
- Open a window or run the fan after bathing
- Look at the sealant regularly in the first couple of years
Keep an eye on the joints over the first couple of years. Hairline gaps can open as timber and plaster dry and can be resealed later.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black keeps the job straightforward.
What happens on the day
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours in a single home. Somewhere as small as Frogmill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- Joints are vacuumed and cleaned of building dust.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
Get a quote
If you’re in Frogmill and need new build mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Advice
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
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.