West Sussex · England
Window & door mastic in Offington, West Sussex
We cover Offington for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Draughty joints inside around the window
- Cracked or shrunken mastic around the frame
- Cold air getting in at the frame edge
What we can’t put right
New sealant cannot fix everything, and we will tell you before we start. Sealant will not put right:
- A frame that has rotted at the joint
- Draughts through the window seals rather than the frame
- Damp coming through the wall itself rather than the frame joint
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Joints and surfaces we work on
- Patio & French doors
- uPVC windows
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
How we handle window mastic in Offington
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. We work on timber windows & doors, uPVC windows and composite doors, and people most often call us about white mastic on grey or black frames and cracked or shrunken mastic around the frame.
Somewhere as small as Offington, 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.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Location
- Offington (BN14, BN13)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Offington
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, and it lets go sooner than it should.
People usually contact us after spotting something like this:
- Damp patches on the reveal after heavy rain
- Cracked sealant at the sill ends
- Mastic that has split away from the wall
- Draughty joints inside around the window
If you live in an older home near St Andrew's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- Are they insured?
- Whether all the old sealant comes out first
- How the colour is chosen
- How long the guarantee is
Your questions about window mastic in Offington
Will you come out to Offington?
Yes, Offington is covered. 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 window mastic in a coastal place like Offington any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
What does window mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Is the work guaranteed?
Yes. Our 12-month guarantee covers every job.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Nearby places to Offington
What else we do in Offington
Windows and doors in Offington
Offington is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. With historic houses such as Ecclesden Manor (about 3.6 miles west) nearby, there’s older building stock in the area around Offington as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to West Worthing station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For site and facilities teams at buildings such as Thomas A Becket Junior School, the mastic around its windows and doors needs looking after like any other building’s.
Offington is about 1 mile north-east of Worthing, in West Sussex. We carry out window mastic for householders, landlords and businesses in Offington and nearby, as part of our work across West Sussex. Our West Sussex coverage runs to 371 places, and Offington is one of them. We also work in Brighton, around 11 miles away.
Every address in BN14 and BN13 is within our area for window mastic, from the main roads to the quietest streets. We cover properties on Rogate Road, Warren Road and Hall Avenue and the roads around them. Offington is on the A24 and A27, so it’s easy for us to get to with everything needed for window mastic. Close by, we work in Salvington (1 mile west), Broadwater (1 mile south-east), Worthing (1 mile south-west), Findon Valley (1 mile north) and Sompting (2 miles east). We also work in nearby towns such as Bognor Regis (13 miles west), Burgess Hill (14 miles north-east), Littlehampton (6 miles west), Shoreham-by-Sea (5 miles east), Lancing (3 miles east) and Rustington (5 miles west).
Around Offington
Typical jobs here are in homes near Thomas A Becket First School, The Thomas a Becket pub and Durrington Minature Railway and the streets around them. For rail, the closest station is West Worthing station, about 1.1 miles south of the centre. Well-known places in the area include Old Castle (0.6 miles south) and Museum of Sussex Folklore (0.6 miles south). Open spaces near Offington include Widewater Lagoon and Steep Down.
Work for landlords, hotels and businesses
Letting agents and landlords in Offington can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
How it works
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before any work starts. The work usually takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Offington needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Mention any parking rules near the property
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
Getting a quote
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Advice
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
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.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Make sure the drainage slots are not blocked
- Clean frames with a soft cloth and soapy water
- Do not aim a pressure washer at the joints
- Do not paint over the silicone
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Surface by surface
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.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.