Hampshire · England
Tidworth External Mastic
We cover Tidworth for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Failed seals between different materials
- Joints where the bead has come unstuck
- Failed sealant between panels on a façade
External mastic in Tidworth, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. We are often asked to deal with cracked joints where brick meets render or frames and leaking joints around cladding and façade panels, across render & cladding joints, brickwork movement joints and copings & trims.
Houses in smaller places like Tidworth can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. Joints on those sides are generally the first to go.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Tidworth (SP9)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we are called out for in Tidworth
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
It’s worth asking for a quote if you see:
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Sealant that has lost its bond to the brick or render
- Panel joints letting water in
Managing a site like The Wellington Academy? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- What happens if the job turns out different
- Whether they seal over old material or remove it
- How the colour is chosen
- What the quote includes, VAT included or not
Nearby places to Tidworth
Other services in Tidworth
Tidworth: your questions answered
Is there a guarantee on external mastic in Tidworth?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Is Tidworth in your area for external mastic?
Yes, Tidworth is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How long does external mastic last?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
How do I get a quote for external mastic in Tidworth?
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’ll get a clear quote before any work starts.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. It generally takes a few hours for a handful of joints, longer for a whole elevation. For a job in Tidworth, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Getting a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Related advice
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not let climbing plants root in the sealant
- Act on the first splits you see
- Show decorators and builders where the movement joints are
- Keep high-pressure jets off the joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- When we can work, for business premises
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- The amount of work
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Roughly how big the job is
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
- Where the property is
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details and send pictures if you have them.
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
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.
What external mastic looks like in Tidworth
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of the Holy Trinity, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Tidworth is about 8 miles west of Andover, in Hampshire. Jobs in Tidworth get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. 683 places in Hampshire are on our list, large and small. Our Southampton page covers work nearby (25 miles or so).
Our applicators cover all of the SP9 postcode area for external mastic and the streets around it. You will find streets such as Station Road, Pennings Road and Ebble Close, and we cover them all. Tidworth sits on or near the A338 and A3026, which makes travel easy. Close by, we work in Perham Down (1 mile east), Ludgershall (2 miles north-east), Shipton Bellinger (2 miles south), Great Shoddesden (2 miles east) and Kimpton (3 miles east). Further out, we also cover Andover (8 miles east), Whitchurch (14 miles east), East Anton (9 miles east), Picket Piece (10 miles east), Picket Twenty (9 miles east) and Finkley Down (10 miles east).
Near you in Tidworth
In Tidworth, that means homes and buildings near Clarendon Infants' School. Well-known places in the area include Ludgershall Castle (2.2 miles north-east). Open spaces near Tidworth include Quarley Hill.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and does not last. In an older home around Tidworth, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- Trusted Arbo and Everbuild sealants
- Neat joints and a tidy finish
- Sanitary silicone with an anti-fungal additive in wet areas
- One-year guarantee on every job
See what affects the cost and our reviews.
How the job changes by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.