Slough · England
Wexham Street Window Mastic
Mastic around window and door frames, sills and patio doors in Wexham Street, with a one-year guarantee on every job. Ask us for a quote.
- Water coming in at the bottom corners of a door
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
How we handle window mastic in Wexham Street
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 aluminium frames, composite doors and window sills, and the jobs we see most are untidy mastic left by window fitters and a bead that doesn’t match the frame.
Around Wexham Street, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Wexham Street (SL2, SL3)
- Wider area
- Slough
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work cannot fix
To be straight with you, there are a few things sealant will not fix:
- Condensation trapped between the panes
- Penetrating damp from a failed cavity tray or render
- A door that needs adjusting, rehanging or new seals
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Window sills
- uPVC windows
What the job involves on each 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
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. Those corners get the most care.
Nearby places to Wexham Street
Also in Wexham Street
Landlord and commercial work in Wexham Street
Landlords and agents in Wexham Street can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
For anyone letting property in or around Wexham Street, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Questions from Wexham Street
I let a flat near Slough station. Can you help?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Wexham Street?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Do you have sealant for grey or black windows?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will use the nearest match.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
When to call us in Wexham Street
Sun, frost and rain wear sealant out. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
The most common problems we see are:
- Sealant in the wrong colour for the frame
- Cracked internal joints between frame and plaster
- Rain getting in at the frame or under the sill
- Rushed sealant from a window installation
If you look after a building such as Khalsa Secondary Academy, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before you book
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- Is VAT in the price?
- How the joint is cleaned and prepared
Why deal with it now?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Around Wexham Street, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- One-year guarantee on every job
- Experience in homes, commercial sites and hotels
- Anti-fungal sanitary silicone in wet areas
- ARBOMaster approved applicator
Read what affects the cost or our reviews.
How it works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Wexham Street, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, 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.
Before we arrive
- Let us know about parking restrictions
- Mention any tricky access
- Clear items away from the joints we’re working on
Ask for a quote
For window mastic in Wexham Street, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Read more
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How much there is to do
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- Any mould that needs treating
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
There’s no standard price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Windows and doors in Wexham Street
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Windsor Castle (about 4.3 miles south) are a reminder that the area around Wexham Street 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.
If you live in an older home near St Andrew's Church Centre, the joint between an old wall and a newer frame is normally the first place rain gets in. If you let a flat or house near Slough station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Wexham Street is about 2 miles north-east of Slough, in Slough. We carry out window mastic for householders, landlords and businesses in Wexham Street and nearby, as part of our work across Slough. Wexham Street is one of 31 towns and villages in Slough where we work. You can also see our page for Reading, about 19 miles away.
Jobs for window mastic in SL2 and SL3 is quoted and booked the same way as anywhere else. Streets in the area include Larkings Lane, Hartley Close and Tubwell Road. We also cover Stoke Poges (1 mile west), Wexham Court (1 mile south), Fulmer (1 mile north-east), George Green (2 miles south-east) and Iver Heath (2 miles east). Further out, we also cover Cippenham (3 miles south-west), Chalvey (3 miles south-west), Langley (3 miles south), Upton (3 miles south), Burnham (4 miles west) and Datchet (4 miles south).
Near you in Wexham Street
Around Wexham Street, our work takes us to homes and buildings near The Plough Public House and The Stoke Poges School. Wexham Street’s nearest station is Slough station, roughly 2.3 miles south. A little further out are The Pavilions (4 miles east) and Windsor Castle (4.3 miles south). For a walk, there’s Stoke Common.