Greater London · England
Window & door mastic in Farnborough, Greater London
Problem with your window and door frames in Farnborough? We remove the old material, prepare the joints and seal them properly.
- Draughty joints inside around the window
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
About our window mastic in Farnborough
Frames and walls don’t move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on window sills, timber windows & doors and composite doors, and people most often call us about a bead that doesn’t match the frame and leaking joints at the ends of sills.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Farnborough.
All our work is covered by a 12-month guarantee.
- Place
- Farnborough (BR6)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Farnborough
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
The most common problems we see are:
- Black, perished sealant on frames
- Rain getting in at the frame or under the sill
- Untidy mastic left by window fitters
- Cold air getting in at the frame edge
For an older house near a landmark such as Church of St Giles the Abbot, the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- What product goes in the joint
- What the quote includes, VAT included or not
- Whether you can choose the colour
- Are they insured?
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Keep solvents and bleach off the sealant
- Do not aim a pressure washer at the joints
- Wash the frames with mild soapy water
- Keep timber frames painted
Keep the new mastic undisturbed while it cures, for as long as we advise. Don’t point a pressure washer at the joints.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Leave it or put it right?
Draughts and leaks do not always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we will say so. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
Combining jobs into one visit is generally more efficient than separate visits. You’ll get one clear quote for the whole job.
Why book with us
- A sealant colour to suit the surroundings
- Every job guaranteed for a year
- ARBOMaster approved applicator
- We agree the colour with you first
Read how sealant jobs are priced and our reviews.
Also near Farnborough
Other services in Farnborough
What window mastic looks like in Farnborough
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Down House (about 2.1 miles south-west) are a reminder that the area around Farnborough has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Rented homes near Orpington station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. As a London address, Farnborough can be tricky for parking: let us know about parking bays, permits or a driveway.
Farnborough is about 2 miles south-west of Orpington, in Greater London. Wherever you are in the BR6 postcode area, we cover window mastic for homes and businesses. Across Greater London, we cover 764 places, Farnborough among them. London is on our list too, around 12 miles away.
Every address in BR6 is within our area for window mastic. You’ll find streets such as Tye Lane, Peel Road and Pitt Road, all of which we cover. We also cover Green Street Green (1 mile south-east), Locksbottom (1 mile north-west), Crofton (1 mile north), Farthing Street (1 mile south-west) and Downe (2 miles south-west). We also work in nearby towns such as London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (13 miles north-west).
Local landmarks in Farnborough
In Farnborough, that means homes and buildings near Newstead Wood School, South Park and The Buff pub and the streets around them. The nearest railway station is Orpington station, roughly 1.2 miles north-east. Nearby you will also find Orpington Hospital (0.9 miles east) and Crofton Roman Villa (1.1 miles north-east). The countryside around Farnborough includes Downe Bank Nature Reserve and Summer Hill.
How we quote for window mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- The number and length of the joints
- The product the joint needs
- The number of rooms or windows
- How easy the joints are to reach
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
How the visit works
On the day, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work starts. The work generally takes a few hours for a few frames, or a day or more for a whole house. For a job in Farnborough, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- On commercial sites, let us know about site rules
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
How to get a quote
If you are in Farnborough and need window mastic, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Related advice
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Your questions about window mastic in Farnborough
Do you cover Farnborough for window mastic?
Yes. Our work covers London and the South East, and Farnborough is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Can parking be tricky for a visit in Farnborough?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Do you seal inside as well as outside?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
Can you do upstairs windows?
Yes, where they can be reached safely. Tell us about access when you get in touch and we’ll plan for it.
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- A frame that has rotted at the joint
- Damp coming through the wall itself rather than the frame joint
- Faulty window hardware
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Aluminium frames
- Patio & French doors
- uPVC windows
- Window sills
- Composite doors
- Timber windows & doors