West Sussex · England
Window & door mastic in Coates, West Sussex
Window and door frames in Coates need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Water coming in at the bottom corners of a door
- White mastic on grey or black frames
- Draughty joints inside around the window
How the visit works
When we arrive, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before any work begins. Most jobs take a morning for a couple of windows and a door. In a small place like Coates, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
How we handle window mastic in Coates
Around Coates we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you are dealing with gaps where the sill meets the wall and gaps left after new windows were fitted, we can put it right, on patio & French doors, aluminium frames and window sills alike.
In a village or hamlet like Coates, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Location
- Coates (RH20)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Keep timber frames painted
- Walk round the house once a year and look at the joints
- Paint up to the joint, not over it
- Keep solvents and bleach off the sealant
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
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.
What affects the quote in Coates
There’s no set price list. The quote depends on:
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- The number and length of the joints
- How many rooms, windows or areas are involved
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Pictures of the joints, sent by email
- What’s wrong with the joints now
- Roughly how big the job is
- If someone has resealed it before
Want a quote for window mastic? Please phone 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Housing providers, facilities teams and property managers book us too in Coates and across West Sussex. We can quote a run of properties together.
Towns and villages near Coates
Also in Coates
What window mastic looks like in Coates
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Bignor Roman Villa (about 2.1 miles south) are a reminder that the area around Coates 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 landlords with property near Pulborough station, renewing tired window mastic between tenants heads off draught and damp complaints. Schools such as Fittleworth CofE Village School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as Church of St Agatha, the joint between an old wall and a newer frame is usually the first place rain gets in.
Coates is about 10 miles north of Littlehampton, in West Sussex. We provide window mastic to homeowners, landlords and businesses in Coates and the surrounding area, as part of our work across West Sussex. Coates is one of 371 towns and villages in West Sussex we cover for window mastic. Crawley is on our list too, around 20 miles away.
Every address in RH20 is covered for window mastic, from the main roads to the quietest streets. We also cover Lower Horncroft (1 mile east), Fittleworth (1 mile north-east), Bedham (1 mile north-east), Watersfield (2 miles south-east) and Coldwaltham (2 miles south-east). Further out, we also cover Horsham (14 miles north-east), Worthing (12 miles south-east), Bognor Regis (12 miles south-west), Chichester (12 miles south-west), Littlehampton (10 miles south) and Lancing (14 miles south-east).
Near you in Coates
Typical jobs here are in homes near The Swan Hotel. Coates’s nearest station is Pulborough station, about 2.7 miles east of the centre. Nearby you’ll also find Coates Castle (0.5 miles south-west) and Coultershaw Heritage Site (2 miles north-west). Open spaces near Coates include Bignor Hill and Amberley Wild Brooks.
How the job changes by surface
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We will tell you if that is what we find.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall.
Can I do it myself?
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.
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.
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- A door that needs adjusting, rehanging or new seals
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Coates
- Patio & French doors
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
Common questions in Coates
Can you help a landlord with a rental near Pulborough station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Coates for window mastic?
Yes, Coates is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
When is the sealant fully cured?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.