Hampshire · England
Window & door mastic in Farnborough, Hampshire
Mastic around window and door frames, sills and patio doors in Farnborough, with a 12-month guarantee on every job. Call for a quick quote.
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
- Draughty joints inside around the window
About our window mastic in Farnborough
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. If you’re dealing with draughts coming in around windows and doors and leaking joints at the ends of sills, we can help, whatever the surface.
Walls in Farnborough that face the prevailing wind take the most weather, and that is usually where the sealant gives up first. It’s worth looking at every frame, not just the one that leaks.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Farnborough (GU14, GU11, GU17)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Places near Farnborough
More services for Farnborough
What we cannot put right
Sealant isn’t the answer to every problem, and we will tell you before work begins. Sealant will not put right:
- A sash or casement that will not close properly
- Damp coming through the wall itself rather than the frame joint
- Condensation trapped between the panes
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Joints and surfaces we work on
- Window sills
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Composite doors
Why deal with it now?
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Black mould and gaps in sealant do not fix themselves, and in a busy household in Farnborough they spread with every shower and every downpour. Now is the easy time to put it right.
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why book with us
- White, clear, grey or coloured to suit, where the product allows
- Colour picked to suit the job
- Anti-fungal silicone where joints get wet
- You choose the colour before work begins
Read what affects the cost or our reviews.
When to call us in Farnborough
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
It’s worth asking for a quote if you see:
- Mastic that’s falling out in pieces
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
- Leaking joints at the ends of sills
For landlords with property near Farnborough Main station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- Who turns up on the day
- What happens if the job turns out different
- Whether VAT is included
- How long the guarantee is
Windows and doors in Farnborough
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Christopher, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like Tower Hill Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Farnborough is about 31 miles south-west of City of Westminster, in Hampshire. Whether you’re in the middle of Farnborough or further out, we cover window mastic for every kind of property. Farnborough is one of 683 places in Hampshire we cover for window mastic. We also work in Reading, about 14 miles from Farnborough.
Jobs for window mastic in GU14, GU11 and GU17 works the same way as everywhere else we cover. Whether your property is on Wallis Square, Church Road West and Longleat Square or a nearby road, we can help. With the A325 and A327 close by, Farnborough is easy for our applicators to reach. Neighbouring places we cover for window mastic include Cove (1 mile west), North Camp (1 mile south-east), Southwood (1 mile west), Mytchett (2 miles east) and Ash Vale (3 miles south-east). We also work in nearby towns such as Basingstoke (15 miles west), Fleet (3 miles south-west), Alton (13 miles south-west), Yateley (4 miles north-west), Bordon (13 miles south) and Hook (8 miles west). Farnborough is one of the larger places we cover in Hampshire.
What’s near Farnborough
Locally, jobs take us to homes and businesses close to The Tilly Shilling pub, Henry Tyndale School and Snaky Lane Community Wildlife Area. Other local landmarks include National Aerospace Library (0.8 miles south-east) and Cove School (0.6 miles north-west). For rail, the closest station is Farnborough Main station, about 0.5 miles east. Nearby you will also find Frimley Park Hospital (2 miles north-east) and Hart Shopping Centre (3.3 miles west). Green spaces nearby include Aunt's Pool and Ball Hill.
What the job involves on each surface
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that’s what we find.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
FAQs for Farnborough
Is window mastic in Farnborough guaranteed?
All our work, in Farnborough and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you help a landlord with a rental near Farnborough Main station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
How much does window mastic cost in Farnborough?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Is the new sealant paintable?
That depends on the product. Silicone is not paintable, but some hybrid sealants are. Tell us if you are decorating and we’ll choose accordingly.
How many windows can you do in a day?
A few frames take a few hours, while a whole house takes longer. We confirm the timing with your quote.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
The process
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of frames, longer for a whole house. A visit in Farnborough needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, 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.
How to prepare
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Ask for a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Related advice
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
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 be quoted together.