Hampshire · England
Harestock External Mastic
We cover Harestock for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
- Brick movement joints where the sealant has split
Do you need external mastic in Harestock?
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Most people get in touch when they notice one of these:
- Failed seals between different materials
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Winchester station, split movement joints are easy to miss on a rental until damp shows inside.
Questions to ask before you book
- Whether VAT is included
- The length of the guarantee
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
External mastic in Harestock
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement. We work on façade panels, concrete & block and joints between brick and frames, and the jobs we see most are leaking joints around cladding and façade panels and weathered mastic that no longer stretches.
In a smaller place like Harestock, some homes face open ground, and walls and rooflines facing the weather take the worst of it. Joints on those sides are generally the first to go.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Place
- Harestock (SO22)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Harestock
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
For anyone letting property in or around Harestock, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Outside joints around Harestock
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.
If you look after a building such as Harestock Primary School, larger buildings have long runs of movement joint that eventually need resealing. In the older streets around Saint Barnabas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Harestock is about 2 miles north-west of Winchester, in Hampshire. From the centre of Harestock to the outskirts, external mastic is available for homes and businesses alike. Our Hampshire coverage runs to 683 places, Harestock among them. There’s also a page for Southampton, about 12 miles away.
All of SO22 is within our area for external mastic. Whether your property is on Kennel Lane, Burley Road and Stoney Lane or a nearby road, we can help. We also cover Littleton (1 mile north-west), Weeke (1 mile south), Abbotts Barton (1 mile south-east), Hyde (1 mile south-east) and Headbourne Worthy (1 mile north-east). Larger places within reach include Eastleigh (8 miles south), Andover (11 miles north-west), Totton (14 miles south-west), Chandler's Ford (7 miles south), Hedge End (12 miles south) and Romsey (9 miles south-west).
What’s near Harestock
Typical jobs here are in homes near Henry Beaufort School and The Running Horse pub. For rail, the closest station is Winchester station, roughly 1.2 miles south-east of the centre. Nearby you’ll also find Royal Observer Corps Museum (1.1 miles south-east) and Royal Hampshire County Hospital (1.5 miles south). The countryside around Harestock includes Twyford Down and Winnall Moors.
Harestock: your questions answered
Do you work for landlords with property near Winchester station?
Yes. We work for landlords and agents as well as homeowners. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Do you cover smaller places like Harestock?
Yes, Harestock is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. We choose one that suits both surfaces.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you use backing rod?
That is backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is usually more efficient.
What does external mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Will the new joint stand out?
The sealant colour is picked to suit the wall, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
Towns and villages near Harestock
More services for Harestock
What we do, step by step
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 for a handful of joints, longer for a whole elevation from start to finish. Parking around Harestock 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.
- 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.
- 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.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
Get a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
Quotes for external mastic in Harestock
There’s no set price list, because jobs vary so much. What we look at:
- When we can work, for business premises
- Any mould that needs treating
- How many areas need sealing
- The type of sealant required
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
When you call or email, these details help:
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- The rough size of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Do not let climbing plants root in the sealant
- Have failed joints looked at early
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead and let water in behind.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
What sealant work can’t fix
It helps to know what we can’t do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
If in doubt, phone 0345 464 0079 or email us and we will say what we think before you book.
Where we work in Harestock
- Copings & trims
- Concrete & block
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Joints between brick and frames