West Sussex · England
Window & door mastic in River, West Sussex
Specialist window mastic for River: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- Draughty joints inside around the window
Window mastic for homes and businesses in River
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. Just phone 0345 464 0079 or drop us an email and tell us how many frames there are and how they’re reached. We work on aluminium frames, patio & French doors and window sills, and people most often call us about draughts coming in around windows and doors and old mastic that has gone black or come away.
Outdoor sealant needs dry, clean surfaces, so work on frames around River is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- River (GU28)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need window mastic in River
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
Most people get in touch when they notice something like this:
- Mastic that is falling out in pieces
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Untidy mastic left by window fitters
Homes close to The Parish Church of St Peter include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before you book anyone
- What insurance they hold
- What guarantee comes with the work
- How long to leave it before use
- Whether the sealant suits the joint
Why deal with it now?
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. Problems with the glass or gaskets are for a window company, and we’ll say so. In a small place like River, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and send you a clear quote before work begins.
Why River customers choose us
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
- Colour picked to suit the job
- We agree the colour with you first
Read our cost guide or customer reviews.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Different surfaces, different methods
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
Questions from River
Is River in your area for window mastic?
Yes. We work across London and the South East, and River is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
What guarantee comes with window mastic in River?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Do you work on first-floor windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
How long should I leave it?
Cure times vary by product. We tell you how long to leave it before we go.
Can tenants book the work?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we will say so.
Landlords, agents and businesses in River
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams. We can quote a run of properties together.
Also in River
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a morning for a couple of windows and a door, depending on how much there is to do. Somewhere like River needs a little journey planning: 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.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Ask for 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, call 0345 464 0079 or email us.
Read more
What window mastic looks like in River
With historic houses such as Petworth House (about 2.4 miles east) nearby, there’s older building stock in the area around River 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around River, as everywhere, window mastic is only as good as the preparation behind it.
River is about 12 miles east of Petersfield, in West Sussex. Whether you are in the middle of River or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, and River is one of them. Our Crawley page covers work nearby, about 22 miles away.
Every address in GU28 is covered for window mastic, from the main roads to the quietest streets. We also cover Upperton (1 mile east), Selham (2 miles south), Tillington (2 miles south-east), South Ambersham (2 miles south-west) and Hampers Green (2 miles east). Further out, we also cover Bognor Regis (14 miles south), Chichester (12 miles south-west), Littlehampton (14 miles south-east), Rustington (15 miles south-east), Storrington (11 miles south-east) and Billingshurst (9 miles east).
Near you in River
Around River, our work takes us to homes and buildings near The Hollist Arms Public House. Other landmarks nearby include Lodsworth Castle (1.3 miles south) and Coultershaw Heritage Site (3 miles south-east). Green spaces nearby include Graffham Common and Blackdown.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Keep solvents and bleach off the sealant
- Air rooms to keep condensation down around windows
- Keep drainage slots and sill grooves clear
- Walk round the house once a year and look at the joints
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.