West Sussex · England
Window Mastic in Twineham
Mastic around window and door frames, sills and patio doors for homes and businesses in Twineham and across West Sussex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Twineham: your questions answered
Can you do window mastic in Twineham?
Yes. We work across London and the South East, and Twineham is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
Will you come out to Twineham?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What does window mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Where do you work from?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or send us an email.
Can resealing stop a draught around my window?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
Do you guarantee window mastic?
Yes, with our one-year guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Window mastic in Twineham, done properly
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on aluminium frames, composite doors and uPVC windows, and the jobs we see most are old mastic that has gone black or come away and gaps between the frame and the inside reveal.
Somewhere as small as Twineham, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Big or small, you get the same 12-month guarantee.
- Place
- Twineham (RH17)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from an hour or two to a full day, depending on how many frames there are. In a small place like Twineham, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Related advice
Aftercare tips
So the new joints stay in good condition:
- Wash the frames with mild soapy water
- Avoid blasting the frames with a pressure washer
- Keep paint and stain on wooden frames in good order
- Do not paint over the silicone
Try not to touch the new joint while it cures, following the cure time we give you. Keep jet washers away from the frames.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
Why deal with it now?
Resealing frames is a short job: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. Around Twineham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
What you get with us
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- Full insurance on every job
- Sealant colour chosen to suit
Also in Twineham
Landlords, agents and businesses in Twineham
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we are fully insured.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
What the job involves on each surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. Those are sealed with a product suited to stone or concrete.
Frames and glazing around Twineham
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 Ockenden Manor (about 4.1 miles north-east) are a reminder that the area around Twineham 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.
For an older house near a landmark such as The Parish Church of St Peter, the joint between an old wall and a newer frame is usually the first place rain gets in. Schools such as Twineham CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Twineham is about 4 miles west of Burgess Hill, in West Sussex. Our applicators cover window mastic for homes and businesses in Twineham and nearby, as part of our work across West Sussex. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. Crawley is on our list too, about 10 miles from Twineham.
Jobs for window mastic in RH17 is quoted and booked the same way as anywhere else. We also cover Twineham Green (1 mile north), Wineham (1 mile west), Crosspost (2 miles north), High Cross (2 miles south) and Kent Street (2 miles north-west). We also work in nearby towns such as Crawley (10 miles north), Horsham (8 miles north-west), Worthing (13 miles south-west), Haywards Heath (6 miles north-east), Burgess Hill (4 miles east) and East Grinstead (14 miles north-east).
What’s near Twineham
Typical jobs here are in homes near St Paul's Catholic College. Twineham’s nearest station is Burgess Hill station, roughly 3.7 miles east of the centre. A little further out are The Dene Hospital (2 miles east) and Burgess Hill Museum (3.6 miles east). For a walk, there’s Bedelands Farm Nature Reserve and Wolstonbury Hill.
What we are called out for in Twineham
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Most people get in touch after spotting one of these:
- Black, perished sealant on frames
- Draughty joints inside around the window
- A bead that doesn’t match the frame
- Untidy mastic left by window fitters
For landlords with property near Burgess Hill station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- What guarantee comes with the work
- Whether all the old sealant comes out first
- What insurance they hold
- How much experience the applicator has
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.