Hampshire · England
Kings Worthy External Mastic
External mastic for Kings Worthy and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Cracked joints where brick meets render or frames
How we handle external mastic in Kings Worthy
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we’ll confirm what’s needed to reach them safely. We work on render & cladding joints, copings & trims and concrete & block, and common reasons people get in touch are movement joints with cracked, split or missing sealant and failed sealant between panels on a façade.
External sealant needs dry, clean surfaces, so work around Kings Worthy is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, it’s backed by our one-year guarantee in Kings Worthy and across Hampshire.
- Location
- Kings Worthy (SO23)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
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. Everything old must be removed first.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
The process
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours to a few days, depending on the length of joint and the access from start to finish. In a small place like Kings Worthy, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Related advice
Towns and villages near Kings Worthy
Other services in Kings Worthy
Keeping the joints in good condition
So the new joints stay in good condition:
- Leave the joints unpainted unless we’ve said otherwise
- Make sure movement joints aren’t pointed over
- Walk round the building once a year and look at the joints
- Tell anyone working on the walls about the movement joints
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead over time.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Common questions in Kings Worthy
Is Kings Worthy within the area you cover?
Yes. Kings Worthy is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Winchester station. Can you help?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is there a guarantee?
Yes. Every job comes with a one-year guarantee.
How long does external mastic last?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away, and reseal at that point.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you when we finish.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. In a small place like Kings Worthy, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Why book with us
- Every job guaranteed for a year
- You choose the colour before work begins
- We never seal over old sealant
- Tidy, careful work
See how sealant jobs are priced and our reviews.
What affects the quote in Kings Worthy
Jobs vary more than people expect. What affects the quote:
- The number of rooms or windows
- Which sealant suits the joint
- Working hours on commercial sites
- Whether there’s mould to deal with
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
When you contact us, it’s useful to know:
- The problem you’ve noticed
- Whether it has been sealed before
- Photos by email, if that is easy
- If it’s domestic, commercial or a hotel
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Joints and surfaces we work on
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Façade panels
What external mastic looks like in Kings Worthy
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Winchester station? Then split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain. Managing a site like Kings Worthy Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Kings Worthy is about 2 miles north of Winchester, in Hampshire. Jobs in Kings Worthy get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. 683 places in Hampshire are on our list, from the larger towns to small villages. Our Southampton page covers work nearby (13 miles or so).
We work across SO23 for external mastic and the streets around it. If you need external mastic at a property on London Road, Church Lane and The Woodlands or anywhere close by, we can help. We also cover Abbots Worthy (1 mile north-east), Easton (1 mile east), Winnall (2 miles south), Martyr Worthy (2 miles east) and Itchen Abbas (3 miles east). Within a short drive, we also cover Basingstoke (15 miles north-east), Eastleigh (9 miles south), Andover (11 miles north-west), Totton (15 miles south-west), Chandler's Ford (8 miles south-west) and Alton (15 miles east).
Near you in Kings Worthy
In Kings Worthy, that means homes and buildings near Henry Beaufort School and The Cart And Horses Public House, among other places. The closest station to Kings Worthy is Winchester station, about 1.8 miles south-west of the centre. A little further out are St John's Rooms And Chapel (2 miles south) and Winchester Castle (2.1 miles south-west). Green spaces nearby include Winnall Moors and Twyford Down.
Landlord and commercial work in Kings Worthy
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
If you manage several properties in or around Kings Worthy, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.