Surrey · England
Chertsey Window Mastic
Our applicators work in Chertsey on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cold air getting in at the frame edge
- Mastic that is falling out in pieces
- A bead that does not match the frame
FAQs for Chertsey
Can you do window mastic in Chertsey?
Yes. We work across London and the South East, and Chertsey is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Chertsey?
Yes, Chertsey is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Can you reach windows above the ground floor?
Yes, in most cases. We plan safe access before the job.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
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 guarantee window mastic?
Yes, for 12 months. A yearly look at the joints helps them last.
How we handle window mastic in Chertsey
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. If you are dealing with white mastic on grey or black frames and cracked sealant at the sill ends, we can help, whatever the surface.
Houses in smaller places like Chertsey can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- Chertsey (KT16, KT15)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Do not use solvent cleaners on the joint
- Clean frames with a soft cloth and soapy water
- Make sure the drainage slots are not blocked
- Look round the frames every year or so
Most silicone sealants won’t take paint, so mention any painting plans before work begins. There are paintable sealants for joints that need it.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
Do you need window mastic in Chertsey?
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 problems people usually mention when they call include:
- Old mastic that has gone black or come away
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
- Water coming in at the bottom corners of a door
Rented homes near Chertsey station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- How hidden problems are handled
- How long to leave it before use
- How the surfaces are prepared before sealing
- How much experience the applicator has
What affects the cost of window mastic
There’s no set price list. What we look at:
- The product the joint needs
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- The number and length of the joints
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
To make quoting easier, let us know:
- Where the job is, and your postcode
- Whether it’s a home or a business
- If someone has resealed it before
- A few photos by email, if you can
If you are in Chertsey and need window mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
More services for Chertsey
The process
When we arrive, we look over the joints with you first. Surfaces next to the work are protected before any work starts. The work generally takes anything from an hour or two to a full day, depending on how many frames there are. For a job in Chertsey, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- 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.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
Ask for a quote
Want a quote for window mastic? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear quote before any work starts.
Read more
Landlords, agents and businesses in Chertsey
If you manage several properties in or around Chertsey, several properties can be quoted together. Send us the addresses and the work at each.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
How the job changes by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.
Composite doors
Composite doors are normally hung in an uPVC-type frame, and the joint around it is sealed like a window. We match the colour to the frame.
Frames and glazing around Chertsey
Historic houses like Botleys Mansion (about 1.5 miles south-west) are a reminder that the area around Chertsey has older buildings as well as new. In older buildings, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Peter, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as St Anne's Catholic Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Chertsey is about 6 miles north-east of Woking, in Surrey. Whether you’re in the middle of Chertsey or further out, we cover window mastic for every kind of property. Our Surrey coverage runs to 395 places, and Chertsey is one of them. We also work in London, about 19 miles from Chertsey.
Jobs for window mastic in KT16 and KT15 works the same way as everywhere else we cover. We cover properties on Station Road, Charles Street and King Street. Chertsey is on the A317 and A320, which makes it straightforward to reach. Other places close to Chertsey include Lyne (1 mile west), Row Town (2 miles south), Ottershaw (2 miles south-west), Trumps Green (3 miles west) and Stonehill (3 miles south-west). Larger places within reach include Guildford (10 miles south), Woking (6 miles south-west), Camberley (10 miles west), Epsom (11 miles east), Ewell (11 miles east) and Egham (3 miles north-west).
Landmarks near Chertsey
Locally, jobs take us to homes and businesses close to Chertsey High School, Sir William Perkins's School and Woburn Park, among other places. Chertsey has its own railway station: Chertsey station. Nearby you’ll also find Runnymede Hospital (1 mile south-west) and Spelthorne Museum (3.2 miles north). For a walk, there’s St Ann's Hill and Gracious Pond.
Leave it or put it right?
Failed mastic isn’t a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we’ll tell you. In a smaller place like Chertsey, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Leaving a failed joint generally makes the job bigger, not smaller. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why Chertsey clients choose us
- White, clear, grey or another colour, product permitting
- A 12-month guarantee on all work
- Anti-fungal sanitary silicone in wet areas
- You choose the colour before work begins
See our cost guide or what customers say.