Windsor and Maidenhead · England
Window Mastic in Maidenhead
Window mastic for Maidenhead and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Rain getting in at the frame or under the sill
- Rushed sealant from a window installation
- Mastic that is falling out in pieces
About our window mastic in Maidenhead
Homes in Maidenhead have every kind of window: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you are dealing with draughts coming in around windows and doors and cracked internal joints between frame and plaster, we can put it right, whatever the surface.
Plenty of homes in a town like Maidenhead have had conservatories, patio doors or new windows added over the years. Each one adds more joints to look after, and those joints age at different rates. Leaks generally start at a sill, a frame head or a glazing joint.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Maidenhead (SL6)
- Region
- Windsor and Maidenhead
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Avoid harsh chemicals near the mastic
- Avoid blasting the frames with a pressure washer
- Clear any debris from frame drain holes
- Paint up to the joint, not over it
Check the drainage slots in the frames are not blocked, so rain drains out rather than building up at the sealant.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Condensation trapped between the panes
- Worn gaskets, brush seals or a door that has dropped
- Soft or decayed wood in the frame
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Aluminium frames
- Patio & French doors
- Composite doors
- Window sills
- Timber windows & doors
- uPVC windows
How we quote for window mastic
The quote reflects the job in front of us. We look at:
- Access and height
- The product the joint needs
- Whether old sealant or filler has to be cut out
- The amount of work
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- A few photos by email, if you can
- Where the property is
- If someone has resealed it before
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Also near Maidenhead
More services for Maidenhead
Leave it or put it right?
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. In a family home in Maidenhead, a failed seal around a bath or a frame lets water into places you can’t see, such as under the floor, behind a panel or into a wall. Left alone, that means rot, damp and a bigger repair.
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why book with us
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- Tidy, careful work
- Experience in homes, commercial sites and hotels
Take a look at what affects the cost and customer reviews.
Surface by surface
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Window sills
Where a sill meets brick or render, the ends often crack first. A tight seal at each end keeps rain out of the wall.
Maidenhead homes and the weather
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. Historic houses like Dorney Court (about 3 miles south-east) are a reminder that the area around Maidenhead 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.
If you live in an older home near All Saints' Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Maidenhead station? Then renewing tired window mastic between tenants heads off draught and damp complaints. If you look after a building such as Claires Court Schools, the mastic around its windows and doors needs looking after like any other building’s.
Maidenhead is about 27 miles west of London, in Windsor and Maidenhead. Whether you’re in the middle of Maidenhead or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 57 places across Windsor and Maidenhead, large and small. Reading is on our list too, around 12 miles away.
We work across SL6 for window mastic and the streets around it. Streets in the area include High Street Mall, High Street and Laggan Square. With the A4 and A308 close by, Maidenhead is simple for us to get to. Close by, we work in Boyn Hill (1 mile south-west), Furze Platt (1 mile north), Cox Green (1 mile south-west), Pinkneys Green (1 mile north-west) and Bray Wick (2 miles south-east). Larger places within reach include Windsor (5 miles south-east), North Ascot (7 miles south), Dedworth (5 miles south-east), Broomhall (10 miles south-east), South Ascot (9 miles south) and Old Windsor (8 miles south-east). Being one of Windsor and Maidenhead’s larger places, Maidenhead has homes, rented property and businesses of every kind.
Landmarks near Maidenhead
In Maidenhead, that means homes and buildings near Boyne Hill CofE Infant and Nursery School, Desborough College and The Windsor Castle pub and the streets around them. Maidenhead’s nearest station is Maidenhead station, roughly 0.5 miles south-east of the centre. Other landmarks nearby include The Reitlinger Bequest Museum (1.2 miles east) and St Mark's Hospital (0.6 miles west). For a walk, there’s Weycock Hill and Taplow Lake.
The process
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours for a few frames, or a day or more for a whole house for a typical job. In Maidenhead, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Getting a quote
If you’re in Maidenhead and need window mastic, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Questions from Maidenhead
Can you do window mastic in Maidenhead?
Yes. We work across London and the South East, and Maidenhead is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Do you work for landlords with property near Maidenhead station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
Can you do upstairs windows?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Will there be a smell?
Some sealants have a smell while they cure. Opening a window helps.
How long will my window job take?
Allow a few hours for a handful of frames, longer for a whole house. Access and how stubborn the old mastic is affect the time most.