Bracknell Forest · England
Window & door mastic in Newell Green, Bracknell Forest
Window mastic across Newell Green and nearby, with every bit of old sealant taken out first.
- Leaking joints at the ends of sills
- Water coming in at the bottom corners of a door
- Draughty joints inside around the window
How we handle window mastic in Newell Green
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Typical jobs include water coming in at the bottom corners of a door and rushed sealant from a window installation, on uPVC windows, aluminium frames and composite doors.
Around Newell Green, 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.
Our work is backed for twelve months, in Newell Green and everywhere else we cover.
- Place
- Newell Green (RG42)
- Wider area
- Bracknell Forest
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes most of a day for a typical house, less for a few frames from start to finish. In a small place like Newell Green, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
Getting a quote
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Read more
Common problems we fix in Newell Green
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
It’s worth asking for a quote if you see:
- Mastic that has split away from the wall
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
- Rushed sealant from a window installation
Homes close to Church of St Michael and All Angels include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Are they insured?
- What preparation is included
- What guarantee comes with the work
- How long to leave it before use
Newell Green homes and the weather
Bracknell, which Newell Green is part of, is one of England’s post-war new towns. With many homes from the post-war decades, replacement windows and doors are common. That mastic ages as well, and sills and frame heads are where leaks start. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Sandy Lane Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Bracknell station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Newell Green is about 2 miles north of Bracknell, in Bracknell Forest. Our applicators cover window mastic for homes and businesses in Newell Green and nearby. Across Bracknell Forest, we cover 41 places, Newell Green among them. For nearby work, see our Reading page, about 10 miles away.
Work in RG42 works the same way as everywhere else we cover. Whether your property is on Sutton Road, Abbey Place and Burge Place or anywhere close by, our applicators can take on the job. Newell Green is on the B3034, which makes it straightforward to reach. Neighbouring places we cover for window mastic include Quelm Park (1 mile south-west), Lawrence Hill (1 mile south-east), Wick Hill (1 mile south), Whitegrove (1 mile south-east) and Warfield (1 mile north-east). Larger places within reach include Sandhurst (6 miles south), Great Hollands (3 miles south-west), Hanworth (3 miles south), College Town (6 miles south), Little Sandhurst (6 miles south-west) and Birch Hill (3 miles south).
Around Newell Green
We work in homes and buildings around Garth Hill College and Lambrook, among other places. Newell Green’s nearest station is Bracknell station, about 1.4 miles south of the centre. Well-known places in the area include Heatherwood Hospital (3 miles south-east) and The Lexicon (1.1 miles south). Open spaces near Newell Green include Heath Lake and Holt Copse & Joel Park.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Damp problems in the wall away from the window
- Broken hinges, locks or handles
- Condensation trapped between the panes
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Window sills
- Composite doors
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Patio & French doors
What happens if it’s left?
Getting a straight, even bead on an outside frame takes practice, 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. Where a wall is exposed, as many are in small places like Newell Green, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why book with us
- Anti-fungal silicone where joints get wet
- Trusted Arbo and Everbuild sealants
- We agree the colour with you first
- Domestic, commercial and hotel work
See how sealant jobs are priced and our reviews.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Check the mastic once a year
- Use gentle cleaners on frames and sealant
- Paint up to the joint, not over it
- Keep paint and stain on wooden frames in good order
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
What affects the cost of window mastic
You’ll get a clear quote before work begins. It’s based on:
- How much there is to do
- The product the joint needs
- How easy the joints are to reach
- How many areas need sealing
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
When you contact us, it’s useful to know:
- The problem you’ve noticed
- How we’d reach the joints
- Roughly how big the job is
- Where the job is, and your postcode
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Your questions about window mastic in Newell Green
Is it worth replacing old sealant in an older home in Newell Green?
Usually, yes, if it’s cracked, shrunk, mouldy or coming away. New sealant won’t stick to old, so the old bead has to come out completely first.
Can you help a landlord with a rental near Bracknell station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Does the work come with a guarantee?
Yes. Every job comes with our one-year guarantee, and we’re fully insured.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
How long does it take to reseal the windows on a house?
The work takes 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.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.