Surrey · England
Window Mastic in Englefield Green
We cover Englefield Green for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Gaps where the sill meets the wall
- Sealant in the wrong colour for the frame
- Gaps left after new windows were fitted
Window mastic for homes and businesses in Englefield Green
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We’re often asked to deal with draughty joints inside around the window and white mastic on grey or black frames, on aluminium frames, patio & French doors and uPVC windows.
Homes around Englefield Green range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
All of our work is guaranteed for twelve months.
- Place
- Englefield Green (TW20)
- Wider area
- Surrey
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Window mastic in Englefield Green: local notes
Historic houses like Frogmore House (about 3.2 miles north) are a reminder that the area around Englefield Green 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’s traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of Our Lady of the Assumption, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to Egham station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Englefield Green is about 1 mile west of Egham, in Surrey. Homes, rented property, offices and hotels in Englefield Green can book us for window mastic. The work is guaranteed for a year. We cover 395 towns and villages across Surrey. Our Reading page covers work nearby.
Postcode districts we cover here for window mastic: TW20. If you need window mastic at a property on South Road, Albert Road and Willson Road or a nearby road, our applicators can take on the job. Englefield Green sits on or near the A328, which makes travel easy. Other places close to Englefield Green include Bishopsgate (1 mile north-west), Egham Wick (1 mile south-west), Egham (1 mile east), Stroude (1 mile south-east) and Hythe End (2 miles north-east). Within a short drive, we also cover Guildford (13 miles south), Woking (8 miles south), Camberley (10 miles south-west), Epsom (14 miles south-east), Ewell (15 miles east) and Walton-on-Thames (8 miles south-east).
Around Englefield Green
Typical jobs here are in homes near The Magna Carta School, Strode's College and The Barley Mow Public House, among other places. The nearest railway station is Egham station, roughly 1 mile east of the centre. A little further out are Windsor Castle (4 miles north) and Spelthorne Museum (2.4 miles east). Green spaces nearby include Virginia Water Lake and St Ann's Hill.
When something else is needed
Before booking, it’s worth knowing the limits too:
- Draughts through the window seals rather than the frame
- Faulty window hardware
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
Nearby places to Englefield Green
Also in Englefield Green
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Signs you need window mastic in Englefield Green
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
If you can see any of these, it’s time to have the joints looked at:
- Gaps left after new windows were fitted
- Rain getting in at the frame or under the sill
- Hard, cracked sealant around windows
- Old mastic that has gone black or come away
Managing a site like Englefield Green Infant School and Nurseries? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Which sealant they’ll use, and why
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
- What the cure time is
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. A visit to Englefield Green is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
How to get a quote
If you’re in Englefield Green and need window mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Advice
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Keep drainage slots and sill grooves clear
- Do not paint over the silicone
- Wipe condensation off the frames
- Check the mastic once a year
Keep the new mastic undisturbed while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Englefield Green questions
Do you work for landlords with property near Egham station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Is Englefield Green within the area you cover?
Yes, Englefield Green is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can I paint over the new sealant?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit.
When is the sealant fully cured?
Cure times vary by product. We tell you how long to leave it before we go.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before any work starts, so mention the height and anything in the way.
How the job changes by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that without cracking.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.