Hampshire · England
South Harewood External Mastic
Specialist external mastic for South Harewood: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Joints with sealant missing in places
- Rigid filler in a joint that should flex
- Rain getting behind render or cladding at a joint
About our external mastic in South Harewood
Movement joints let brickwork, render and cladding expand and shrink without cracking. 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. Typical jobs include weathered mastic that no longer stretches and weeds or debris growing in open joints, across façade panels, concrete & block and joints between brick and frames.
Around South Harewood, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Every job comes with our 12-month guarantee.
- Place
- South Harewood (SP11)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
South Harewood questions
Will you come out to South Harewood?
Yes, South Harewood is covered. 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.
Do you cover South Harewood for external mastic?
Yes. Our work covers London and the South East, and South Harewood is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Can a movement joint be filled with mortar?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Do you have insurance?
Yes. We are fully insured, and we can confirm the details when we quote.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Can you reach joints on upper floors?
Each building is different. Tell us the height, the number of joints and what’s below them.
How we quote for external mastic
For a quick quote, just ask. What matters most is:
- Which sealant suits the joint
- Mould in or behind the old joints
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
Doing several joints on one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Where the property is
- The rough size of the job
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Nearby places to South Harewood
Other services in South Harewood
How it works
The work is kept neat and contained to the joints we are treating, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the building. For a village or hamlet like South Harewood, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- On commercial sites, let us know about site rules
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Read more
For landlords and businesses
We also work for property managers and facilities teams in South Harewood and across Hampshire. Several sites can go on one quote, and we’re fully insured.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
When to call us in South Harewood
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Most people get in touch when they notice something like this:
- Rigid filler in a joint that should flex
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
Rented homes near Andover station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- What guarantee comes with the work
- Whether they’re fully insured
- What happens if the job turns out different
- Whether they seal over old material or remove it
Aftercare tips
So the new joints stay in good condition:
- Make sure movement joints are not pointed over
- Walk round the building once a year and look at the joints
- Keep soil, plants and ivy away from the joints
- Deal with leaking gutters that soak the joints below
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
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. Where a wall is exposed, as many are in small places like South Harewood, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- Colour agreed with you before work begins
- A sealant colour to suit the surroundings
- Anti-fungal silicone where joints get wet
- Full insurance on every job
Take a look at our cost guide and what customers say.
External mastic in South Harewood: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Wherwell Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
South Harewood is about 4 miles south-east of Andover, in Hampshire. Our applicators cover external mastic for homeowners, landlords and businesses in South Harewood and the surrounding area, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, and South Harewood is one of them. Southampton is on our list too, about 18 miles from South Harewood.
All of SP11 is covered for external mastic, from the main roads to the quietest streets. Close by, we work in Wherwell (1 mile south-west), Wherwell Wood (2 miles west), Chilbolton (2 miles south-west), Cottonworth (2 miles south-west) and Fullerton (3 miles south-west). Within a short drive, we also cover Basingstoke (15 miles north-east), Winchester (9 miles south-east), Eastleigh (15 miles south), Andover (4 miles north-west), Chandler's Ford (13 miles south) and Romsey (13 miles south).
Local landmarks in South Harewood
South Harewood’s nearest station is Andover station, about 4 miles north-west of the centre. A little further out are Andover War Memorial Hospital (4.3 miles north-west) and Finkley Down Farm Museum (3.5 miles north-west). Green spaces nearby include Mill Lake and Anton Lakes.
Different surfaces, different methods
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it. Tell us what the building has when you get in touch.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out and helps it last.