Hampshire · England
External & façade joints in Wallington, Hampshire
Professional external mastic in and around Wallington, with every bit of old sealant taken out first.
- Sealant pulling away from one side of the joint
- Rigid filler in a joint that should flex
- Leaking joints around cladding and façade panels
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Keep high-pressure jets off the joints
- Do not let climbing plants root in the sealant
- Make sure movement joints are not pointed over
- Tell anyone working on the walls about the movement joints
Keep pressure washers away from the sealant. High-pressure water can lift the edges.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage.
How we handle external mastic in Wallington
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. We’re often asked to deal with moss and dirt in joints with no sealant left and cracked joints where brick meets render or frames, on brickwork movement joints, render & cladding joints and façade panels.
Homes around Wallington range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Your job is guaranteed for a year, as with all our work.
- Place
- Wallington (PO16, PO14, PO17)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Wallington
Also in Wallington
Different surfaces, different methods
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. We reseal them with a low-modulus sealant over backing rod.
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
FAQs for Wallington
I let a flat near Fareham station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Is Wallington within the area you cover?
Yes. Wallington is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Wallington, along with the rest of our area.
Are you fully insured?
Yes, we are fully insured.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can you match the colour of my brickwork?
The sealant colour is picked to suit the wall. There’s a wide choice of exterior colours.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we will confirm the access.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Honest limits
We won’t take on work that won’t last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
- Movement that’s more than a sealant joint can take
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Wallington
- Façade panels
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
What happens on the day
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to several days, depending on the building from start to finish. A visit to Wallington is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
Getting a quote
Asking for a quote is easy: tell us 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.
Read more
Do you need external mastic in Wallington?
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and speed up the damage.
It’s worth asking for a quote if you see:
- Water getting into walls through failed joints
- Movement joints filled with mortar instead of sealant
- Plants rooting in failed movement joints
- Old sealant gone brittle and cracked
For an older house near a landmark such as Parish Church of St Peter and St Paul, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Whether you can choose the colour
- Whether all the old sealant comes out first
Outside joints around Wallington
Wallington is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Fareham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Wykeham House School, larger buildings have long runs of movement joint that eventually need resealing.
Wallington is about 1 mile east of Fareham, in Hampshire. Every kind of property in Wallington can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Our Hampshire coverage runs to 683 places, Wallington among them.
Here we cover the PO16, PO14 and PO17 postcode area for external mastic. Local streets include Bath Lane, Drift Road and Osborn Road, and we cover them all. Being close to the A32, Wallington is easy for our applicators to reach. If you’re just outside Wallington, we cover Fareham Common (1 mile south-west), North Fareham (1 mile north), Fareham (1 mile west), Boarhunt (2 miles north-east) and Crockerhill (2 miles north). Within a short drive, we also cover Gosport (4 miles south), Havant (8 miles east), Eastleigh (11 miles north-west), Horndean (8 miles north-east), Totton (15 miles west) and Chandler's Ford (13 miles north-west).
Landmarks near Wallington
In Wallington, that means homes and buildings near Harrison Primary School, Cams Hill School and The Golden Lion Public House. The closest station to Wallington is Fareham station, about 1 mile west of the centre. Other landmarks nearby include Fareham Shopping Centre (less than half a mile west) and Knowle Hospital (2.3 miles north-west). The countryside around Wallington includes Portsdown Hill and West of the River Alver.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Homes in smaller places like Wallington can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why book with us
- Anti-fungal sanitary silicone in wet areas
- Sealant colour chosen to suit
- Domestic, commercial and hotel work
- Old sealant always removed completely
Read what affects the cost and what customers say.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.