West Sussex · England
Window & door mastic in Shopwyke, West Sussex
Mastic around window and door frames, sills and patio doors in Shopwyke, with a 12-month guarantee on every job. Call for a quick quote.
- White mastic on grey or black frames
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
Questions from Shopwyke
Do you cover smaller places like Shopwyke?
Yes, Shopwyke is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Shopwyke in your area for window mastic?
Yes. Our work covers London and the South East, and Shopwyke is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We’ll tell you what we’re using and why.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you when we finish.
Do you have insurance?
Yes. We’re fully insured for domestic and commercial work.
Can landlords and businesses book you?
Yes, often. Several properties can be quoted together.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or drop us an email.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Window mastic for homes and businesses in Shopwyke
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. Typical jobs include untidy mastic left by window fitters and hard, cracked sealant around windows, across timber windows & doors, patio & French doors and window sills.
Outdoor sealant needs dry, clean surfaces, so work on frames around Shopwyke is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Your job is guaranteed for a year, as with all our work.
- Place
- Shopwyke (PO20)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. In a small place like Shopwyke, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why book with us
- Tidy, careful work
- You choose the colour before work begins
- Anti-fungal silicone where joints get wet
- 180+ five-star Google reviews
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll give you a quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. 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.
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.
Surface by surface
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We’ll point out any rot we find, as that’s a job for a joiner.
The process
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a morning for a couple of windows and a door. Somewhere like Shopwyke needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
How to get a quote
Getting a quote is simple: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we will take it from there.
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Towns and villages near Shopwyke
More services for Shopwyke
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. Our tips:
- Ventilate rooms so frames don’t stay wet inside
- Avoid harsh chemicals near the mastic
- Paint up to the joint, not over it
- Do not aim a pressure washer at the joints
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What window mastic looks like in Shopwyke
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. With historic houses such as Goodwood House (about 2.1 miles north) nearby, there’s older building stock in the area around Shopwyke as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like Westbourne House School? Then its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Chichester station, renewing tired window mastic between tenants heads off draught and damp complaints.
Shopwyke is about 2 miles east of Chichester, in West Sussex. If you need window mastic in Shopwyke, please phone 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover West Sussex, Shopwyke included. Our West Sussex coverage runs to 371 places, and Shopwyke is one of them. Portsmouth is on our list too, around 15 miles away.
All of PO20 is within our area for window mastic. We cover properties on Coach Road and Drayton Lane. Other places close to Shopwyke include Maudlin (1 mile north), Westhampnett (1 mile north-west), Oving (1 mile east), Portfield (1 mile west) and Strettington (1 mile north). We also work in nearby towns such as Worthing (15 miles east), Bognor Regis (4 miles south-east), Selsey (8 miles south), Littlehampton (9 miles east), Emsworth (9 miles west) and Rustington (10 miles east).
Near you in Shopwyke
Around Shopwyke, our work takes us to homes and buildings near The Coach And Horses Public House, The March CofE Primary School and Chichester High School For Girls. The closest station to Shopwyke is Chichester station, about 1.9 miles west. A little further out are Chichester Castle (1.5 miles west) and St Richard's Hospital (1.3 miles west). Open spaces near Shopwyke include Stoke Down.
Signs you need window mastic in Shopwyke
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
Look out for any of the following:
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
- Gaps where the sill meets the wall
- Old mastic that has gone black or come away
In the older streets around The Parish Church of St Peter, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before you book anyone
- Is VAT in the price?
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- Which sealant they’ll use, and why