West Sussex · England
Window Mastic in Dial Post
Mastic around window and door frames, sills and patio doors for homes and businesses in Dial Post and across West Sussex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Rain getting in at the frame or under the sill
- Gaps where the sill meets the wall
- Mastic that is falling out in pieces
Window mastic for homes and businesses in Dial Post
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, ring 0345 464 0079 or email us with the number of frames and any access details. We work on aluminium frames, patio & French doors and uPVC windows, and the jobs we see most are draughty joints inside around the window and sealant in the wrong colour for the frame.
Mastic can only go onto a dry, clean joint, so window work in Dial Post is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Dial Post (RH13)
- Region
- West Sussex
- Cover
- One year on every job
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around Dial Post
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Dial Post, as everywhere, window mastic is only as good as the preparation behind it.
Dial Post is about 7 miles south of Horsham, in West Sussex. We provide window mastic to householders, landlords and businesses in Dial Post and nearby, as part of our work across West Sussex. 371 places in West Sussex are on our list, from the larger towns to small villages. There’s also a page for Crawley, roughly 13 miles from Dial Post.
Every address in RH13 is within our area for window mastic. Streets in the area include The Green, Swallows Lane and Bentons Lane, all of which we cover. We also cover the places around Dial Post: Whitehall (2 miles north-west), Shipley (2 miles north), West Grinstead (2 miles north-east), Broomer's Corner (2 miles north-west) and Partridge Green (2 miles east). We also work in nearby towns such as Crawley (13 miles north-east), Horsham (7 miles north), Worthing (10 miles south), Haywards Heath (12 miles east), Burgess Hill (10 miles east) and Littlehampton (13 miles south-west).
Local landmarks in Dial Post
Not far away are Knepp Wildland and Chanctonbury Hill.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Ventilate rooms so frames don’t stay wet inside
- Walk round the house once a year and look at the joints
- Do not paint over the silicone
- Don’t aim a pressure washer at the joints
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just ring 0345 464 0079 or email us.
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.
Do you need window mastic in Dial Post?
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, and it lets go sooner than it should.
Most people get in touch when they notice something like this:
- Gaps between the frame and the inside reveal
- Leaking joints at the ends of sills
- Black, perished sealant on frames
- A bead that does not match the frame
Whether the job is in Dial Post itself or nearby, the right material for each joint matters as much as a neat finish.
Comparing quotes
- How much experience the applicator has
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Whether VAT is included
Dial Post: your questions answered
Will you come out to Dial Post?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is there a guarantee on window mastic in Dial Post?
All our work, in Dial Post and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Is it messy?
No. We protect the surfaces around the joints, and we tidy up before we go.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Can I paint over the new sealant?
Most silicone cannot be painted. Let us know beforehand, and we will use a paintable product where it suits.
How the visit works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. For a village or hamlet like Dial Post, 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.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Related advice
Why it’s worth doing now in Dial Post
Not every sealant suits a window. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Around Dial Post, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why us?
- 180+ five-star Google reviews
- 12-month guarantee on every job
- You choose the colour before work begins
- Arbo and Everbuild products
Read our cost guide or customer reviews.
How the job changes by surface
Window sills
Where a sill meets brick or render, the ends often crack first. A tight seal at each end keeps rain out of the wall.
Patio & French doors
Water at the foot of a door frame is not always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We check before we reseal.
Landlords, agents and businesses in Dial Post
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Other services in Dial Post
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.