Hampshire · England
External & façade joints in Whiteley, Hampshire
Professional external mastic in and around Whiteley, with every bit of old sealant taken out first and a one-year guarantee.
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
- Failed seals between different materials
External mastic in Whiteley, done properly
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. We’re often asked to deal with hard, crazed mastic that has stopped moving and movement joints with cracked, split or missing sealant, across joints between brick and frames, brickwork movement joints and concrete & block.
Outbuildings, garages and conservatories around homes in places like Whiteley add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Whiteley (PO15)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we are called out for in Whiteley
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
The most common problems we see are:
- Plants rooting in failed movement joints
- Panel joints letting water in
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
For landlords with property near Swanwick station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Which colour the sealant will be
- How hidden problems are handled
- What product goes in the joint
- When the joint can take water or movement
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Whiteley questions
Is Whiteley in your area for external mastic?
Yes. We work across London and the South East, and Whiteley is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you cover smaller places like Whiteley?
Yes, we do. 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.
Can I add another job to the visit?
Yes. Just list everything you need and you will get one quote.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we’ll confirm the access.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
When will the joints need doing again?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
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.
What affects the cost of external mastic
We do not publish a price list. What we look at:
- Working hours on commercial sites
- The product the joint needs
- How much there is to do
- Access and height
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What we need to know
When you call or email, these details help:
- How many joints, rooms or windows are involved
- How we’d reach the joints
- What’s wrong with the joints now
- Where the property is
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Landlords, agents and businesses in Whiteley
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
We also work for property managers and facilities teams in Whiteley and across Hampshire. Several sites can be quoted together, and we’re fully insured.
Towns and villages near Whiteley
Other services in Whiteley
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Have failed joints looked at early
- Deal with leaking gutters that soak the joints below
- Walk round the building once a year and look at the joints
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
How the visit works
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a handful of joints, longer for a whole elevation. Parking around Whiteley is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
Get a quote
For external mastic in Whiteley, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Read more
Outside joints around Whiteley
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Whiteley Primary School, its movement joints, gutters and trims need looking after like any other building’s. Homes close to St Margaret Mary include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Whiteley is about 3 miles south-east of Hedge End, in Hampshire. For external mastic in and around Whiteley, please phone 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base. Whiteley is one of 683 towns and villages in Hampshire we cover for external mastic. There’s also a page for Southampton, roughly 6 miles from Whiteley.
Here we cover the PO15 postcode area for external mastic. Streets in the area include Oak Coppice Road, Thyme Avenue and Christie Avenue, all of which we cover. We also cover the places around Whiteley: Burridge (1 mile north-west), Park Gate (1 mile south-west), Segensworth (1 mile south), Sarisbury (1 mile south-west) and Swanwick (1 mile west). Larger places within reach include Winchester (12 miles north), Gosport (7 miles south-east), Havant (12 miles east), Eastleigh (7 miles north-west), Fareham (3 miles south-east) and Horndean (11 miles east).
What’s near Whiteley
Typical jobs here are in homes near Brookfield Community School and Language College, among other places. Whiteley’s nearest station is Swanwick station, about 0.8 miles south-west of the centre. A little further out are St Andrew's Castle (3.5 miles south-west) and Fareham Community Hospital (1.4 miles south-west). Open spaces near Whiteley include Swanwick Lakes.