West Sussex · England
Selsfield Common Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Selsfield Common and across West Sussex. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Rain getting in at the frame or under the sill
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work starts. Most jobs take a morning for a couple of windows and a door. For a village or hamlet like Selsfield Common, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Clear the area around the work
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
Window mastic in Selsfield Common
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on uPVC windows, patio & French doors and aluminium frames, and the jobs we see most are old mastic that has gone black or come away and cracked or shrunken mastic around the frame.
Around Selsfield Common, 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.
All of our work is guaranteed for twelve months.
- Place
- Selsfield Common (RH19)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
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 fails, we can still redo it.
Selsfield Common: your questions answered
Do you work for landlords with property near East Grinstead station?
Yes. We work for landlords and letting agents as well as homeowners. You can call 0345 464 0079 or email us with the details for a clear quote.
Do you cover smaller places like Selsfield Common?
Yes, Selsfield Common 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 you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Where do you work from?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is the work guaranteed?
Yes, with our one-year guarantee. A yearly look at the joints helps them last.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
How many windows can you do in a day?
A few frames take a few hours. You’ll get a timescale with the quote.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
What we are called out for in Selsfield Common
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. If the sealant cannot stretch, it splits.
If you can see any of these, it’s time to have the joints looked at:
- Draughts coming in around windows and doors
- Black, perished sealant on frames
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
Schools such as Turners Hill CofE Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- The length of the guarantee
- When the joint can take water or movement
- Whether you can choose the colour
- How hidden problems are handled
What affects the cost of window mastic
The quote reflects the job in front of us. We look at:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- The size of the job
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
Asking for a quote
To make quoting easier, please include:
- The type of property
- The address or postcode of the job
- Whether it has been sealed before
- A few photos by email, if you can
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
What happens if it’s left?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we will say so. Around Selsfield Common, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why book with us
- A choice of colours where the product allows
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
- Fully insured
Take a look at our cost guide and what customers say.
What window mastic looks like in Selsfield Common
With historic houses such as Gravetye Manor (about 0.8 miles east) nearby, there’s older building stock in the area around Selsfield Common as well as newer homes. In older buildings, 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.
If you live in an older home near Church of St Leonard, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near East Grinstead station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Selsfield Common is about 4 miles south-west of East Grinstead, in West Sussex. If you need window mastic in Selsfield Common, please call 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover West Sussex, Selsfield Common included. We cover 371 towns and villages across West Sussex.
We cover every part of RH19 for window mastic. Selsfield Common is on the B2028, so it’s easy for us to get to with everything needed for window mastic. Close by, we work in West Hoathly (1 mile south-east), Sharpthorne (2 miles south-east), Little London (2 miles south), Highbrook (3 miles south) and Ardingly (3 miles south). Further out, we also cover Crawley (5 miles west), Horsham (11 miles west), Haywards Heath (6 miles south), Burgess Hill (10 miles south), East Grinstead (4 miles north-east) and Broadfield (6 miles west).
Landmarks near Selsfield Common
Around Selsfield Common, our work takes us to homes and buildings near The Crown Public House, among other places. Selsfield Common’s nearest station is East Grinstead station, roughly 3.5 miles north-east of the centre. Well-known places in the area include Queen Victoria Hospital (4.5 miles north-east) and Waterbury Castle (4 miles south-east). The countryside around Selsfield Common includes Hedgecourt Lake.
What sealant work can’t fix
We will not take on work that won’t last, so these are the limits:
- Faulty window hardware
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Window sills
- Aluminium frames
- Composite doors
- Timber windows & doors
- Patio & French doors
- uPVC windows
Places near Selsfield Common
What else we do in Selsfield Common
How the job changes by surface
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. White is the usual colour, with brown, anthracite grey and black for coloured frames.