Surrey · England
Brockham Window Mastic
Professional window mastic in and around Brockham, with every bit of old sealant taken out first and a one-year guarantee.
- White mastic on grey or black frames
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
How the job changes by surface
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match suits the frame.
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
Window mastic for homes and businesses in Brockham
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. We work on uPVC windows, timber windows & doors and window sills, and people most often call us about water coming in at the bottom corners of a door and old mastic that has gone black or come away.
Somewhere as small as Brockham, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Brockham (RH3)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. The old mastic has to come out. Where a wall is exposed, as many are in small places like Brockham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why choose Mr Mastic in Brockham
- Homes, businesses and hotels
- A choice of colours where the product allows
- 20+ years of sealant experience
- Neat joints and a tidy finish
Take a look at what affects the cost and our reviews.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Keep timber frames painted
- Keep paint off silicone joints
- Clean frames with a soft cloth and soapy water
- Do not use solvent cleaners on the joint
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Draughts through the window seals rather than the frame
- Damp problems in the wall away from the window
- A sash or casement that won’t close properly
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Brockham
- Composite doors
- Timber windows & doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Window sills
Brockham: your questions answered
Is Brockham in your area for window mastic?
Yes, Brockham is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
I let a flat near Betchworth station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
Will new mastic stop draughts?
It will if the frame joint is the problem. We check where the draught is before we start.
Can you do several jobs on one visit?
Yes. Just list everything you need and you will get one quote.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you reach windows above the ground floor?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Can new window sealant be painted?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
What happens on the day
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a morning for a couple of windows and a door. For a village or hamlet like Brockham, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Clear items away from the joints we’re working on
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or send us an email.
Related advice
Brockham homes and the weather
Historic houses like Polesden Lacey (about 4.2 miles west) are a reminder that the area around Brockham has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Christ Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Betchworth station, renewing tired window mastic between tenants heads off draught and damp complaints. If you look after a building such as North Downs Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Brockham is about 2 miles east of Dorking, in Surrey. Our applicators cover window mastic for homeowners, landlords and businesses in Brockham and the surrounding area, as part of our work across Surrey. Brockham is one of 395 towns and villages in Surrey we cover. For nearby work, see our Crawley page, about 9 miles away.
All of RH3 is covered for window mastic. Streets in the area include Holly Close, Nutwood Avenue and Kiln Lane, all of which we cover. If you are just outside Brockham, we cover Betchworth (1 mile north-east), Strood Green (1 mile south), Box Hill (1 mile north), Buckland (1 mile east) and Bunce Common (2 miles south). Larger places within reach include Guildford (13 miles west), Woking (14 miles north-west), Epsom (7 miles north), Horley (6 miles south-east), Redhill (5 miles east) and Ewell (8 miles north).
Near you in Brockham
Around Brockham, our work takes us to homes and buildings near The Ashcombe School, Pippbrook House and Inn on The Green and the streets around them. The nearest railway station is Betchworth station, about 1.1 miles north-east. Other landmarks nearby include Reigate Priory Museum (3.3 miles east) and Headley Court (3.9 miles north). For a walk, there’s Reigate Heath and Box Hill.
What affects the quote in Brockham
Some jobs are bigger than they look, and some smaller. What affects the quote:
- When we can work, for business premises
- The size of the job
- Mould in or behind the old joints
- Whether the work is at height
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you contact us, these details help:
- The problem you’ve noticed
- The address or postcode of the job
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.