Greater London · England
Sand mastic for sash & case windows in Brasted, Greater London
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Brasted, backed by a 12-month guarantee. Call for a quick quote.
- Draughty sash windows at the surround
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
What sand mastic looks like in Brasted
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
As a London address, Brasted can be tricky for parking: let us know about parking bays, permits or a driveway. Rented homes near Dunton Green station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Brasted is about 3 miles west of Sevenoaks, in Greater London. Every kind of property in Brasted can book us for sand mastic. The work is guaranteed for a year. We cover 764 towns and villages across Greater London. There’s also a page for Crawley, roughly 17 miles from Brasted.
Our applicators cover all of the TN16 postcode area for sand mastic. Streets in the area include High Street, Station Road and Watermill Close, and we cover them all. Close by, we work in Sundridge (1 mile east), Brasted Chart (1 mile south), Chipstead (2 miles east), Chevening (2 miles north-east) and Bessels Green (2 miles east). Further out, we also cover Orpington (7 miles north), New Cross (15 miles north-west), Thornton Heath (13 miles north-west), Croydon (11 miles north-west), East Dulwich (15 miles north-west) and Plumstead (15 miles north).
Near you in Brasted
Around Brasted, our work takes us to homes and buildings near The White Hart pub and the streets around them. The closest station to Brasted is Dunton Green station, about 3.1 miles north-east. Well-known places in the area include Sevenoaks Museum (3.8 miles east) and Tandridge Priory (3.8 miles south-west). Open spaces near Brasted include Betsom's Hill and Dryhill Nature Reserve.
Sand mastic in Brasted
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. We work on brick reveals, period & listed homes and sash and case windows, and the jobs we see most are a silicone bead on a sash window that spoils the look and tired mastic found when preparing windows for paint.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Brasted as anywhere.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Brasted (TN16)
- Region
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- The amount of work
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- Any working-time requirements on site
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- A few photos by email, if you can
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
- Any access issues, like height or stairs
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or drop us an email.
More services for Brasted
How the visit works
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours per window, depending on the condition of the joints. In Brasted, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
Get a quote
For sand mastic in Brasted, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Advice
How the job changes by surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Leave it or put it right?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Brasted, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why book with us
- One-year guarantee on every job
- Anti-fungal silicone where joints get wet
- An ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
Signs you need sand mastic in Brasted
Timber frames move with the seasons. That movement opens up the mastic joint little by little.
Signs it’s time to call us include:
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
- Mastic worn away on windows facing the weather
- Open joints round the window box
For site and facilities teams at buildings such as Combe Bank School, the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- Is VAT in the price?
- What product goes in the joint
- How the colour is chosen
- What the cure time is
For landlords and businesses
Landlords and letting agents in Brasted can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
If you manage several properties in or around Brasted, several properties can be quoted together. Just tell us the addresses and what each one needs.
Questions from Brasted
Is parking a problem for a job in Brasted?
Parking in Brasted, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you help a landlord with a rental near Dunton Green station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you will get one quote.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can you match the sealant colour?
In most cases you can choose. We will explain which colours are available.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Keep modern sealant off the mastic
- Renew mastic before redecorating the windows
- Look over the window mastic once a year
- Get any rot dealt with first
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.