Hampshire · England
External & façade joints in South Warnborough, Hampshire
External mastic for South Warnborough, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Plants rooting in failed movement joints
- Panel joints letting water in
- Cracked joints where brick meets render or frames
What affects the cost of external mastic
Your quote is based on your job. We look at:
- How many areas need sealing
- The type of sealant required
- The old material and how stubborn it is
- Mould in or behind the old joints
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
If you are in South Warnborough and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
How we handle external mastic in South Warnborough
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on copings & trims, brickwork movement joints and façade panels, and common reasons people get in touch are rigid filler in a joint that should flex and gaps where render, brick and frames meet.
External sealant needs dry, clean surfaces, so work around South Warnborough is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- South Warnborough (RG29)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to South Warnborough
What else we do in South Warnborough
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The process
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the work takes anything from a few hours to several days, depending on the building in most cases. In a small place like South Warnborough, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
- 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 are ready, phone 0345 464 0079 or send us an email.
Advice
Landlords, agents and businesses in South Warnborough
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
If you manage several properties in or around South Warnborough, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Different surfaces, different methods
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
FAQs for South Warnborough
Can you do external mastic in South Warnborough?
Yes. Our work covers London and the South East, and South Warnborough is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Do you cover smaller places like South Warnborough?
Yes. South Warnborough 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.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. We’ll talk through colour options before we start from the range available.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What is a movement joint?
A vertical gap in a long brick wall is normally a movement joint. It gives the wall room to move and needs a flexible seal, not mortar.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will 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.
How much does external mastic cost in South Warnborough?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Why it’s worth doing now in South Warnborough
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Around South Warnborough, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
Why us?
- Every job guaranteed for a year
- More than 20 years in sealant work
- An ARBOMaster approved applicator
- Colour picked to suit the job
Take a look at what affects the cost and customer reviews.
South Warnborough buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Robert May's School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Andrew, an extension built onto an older house moves differently, and the joint between them takes the strain. For landlords with property near Hook station, outside joints that have cracked can let damp into a rental, so check them between lets.
South Warnborough is about 5 miles north of Alton, in Hampshire. We carry out external mastic for homes and businesses in South Warnborough and the surrounding area, as part of our work across Hampshire. South Warnborough is one of 683 places in Hampshire where we work. We also work in Reading, about 16 miles from South Warnborough.
We work across the RG29 postcode area for external mastic. Local streets include Gaston Lane, Tigwells Field and Alton Road, all of which we cover. Close by, we work in Long Sutton (1 mile east), Bidden (1 mile north-west), Little Hoddington (1 mile north-west), Well (2 miles east) and Greywell (3 miles north). Within a short drive, we also cover Basingstoke (7 miles north-west), Farnborough (10 miles north-east), Fleet (7 miles north-east), Aldershot (9 miles east), Alton (5 miles south) and Petersfield (15 miles south).
What’s near South Warnborough
The nearest railway station is Hook station, about 3.9 miles north of the centre. Nearby you will also find Odiham Castle (2.7 miles north) and Gliding Heritage Centre (3.5 miles south-west). Open spaces near South Warnborough include Holybourne Hill and Dogmersfield Lake.
What we can’t put right
We won’t take on work that won’t last, so these are the limits:
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
- Render that’s blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in South Warnborough
- Copings & trims
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Façade panels