Hampshire · England
External & façade joints in Finkley, Hampshire
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Finkley and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
External mastic in Finkley
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product. Common call-outs are for joints with sealant missing in places and weathered mastic that no longer stretches, on joints between brick and frames, concrete & block and façade panels.
Somewhere as small as Finkley, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Finkley (SP11)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Structural movement, which needs a surveyor or engineer
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Concrete & block
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
Leave it or put it right?
Resealing a run of joints in one go is usually better than patching one at a time. Joints of the same age tend to fail together. Older cottages and farmhouses around Finkley can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why choose Mr Mastic in Finkley
- Any old sealant cut out fully, not covered over
- Anti-fungal silicone where joints get wet
- Rated 4.9 stars on Google
- Every job guaranteed for a year
Take a look at what affects the cost and our reviews.
Signs you need external mastic in Finkley
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
Look out for these signs:
- Rigid filler in a joint that should flex
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Weathered mastic that no longer stretches
In the older streets around Christ Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- Whether you can choose the colour
- Who does the work, and how experienced they are
- Whether all the old sealant comes out first
- Is VAT in the price?
How it works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Somewhere like Finkley needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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
- Plan for the work area to be out of bounds to pets and children
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
Getting a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will talk you through the work.
Read more
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
- Clear growth from the base of walls and joints
- Avoid pressure-washing directly into sealant joints
Don’t paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
What else we do in Finkley
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- The size of the job
- The number of rooms or windows
- How easy the joints are to reach
What you pay reflects the work, not guesswork. That is why we ask about the job first.
Helping us quote
There’s no need for technical detail. Just tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or send us an email.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Questions from Finkley
Is Finkley in your area for external mastic?
Yes, Finkley is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Andover station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Is the work guaranteed?
Yes, always. Each job is guaranteed for twelve months, large or small.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
How much does external mastic cost in Finkley?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Walls and rooflines in Finkley
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 landlords with property near Andover station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as Smannell and Enham Church of England (Aided) Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Finkley is about 2 miles north-east of Andover, in Hampshire. For external mastic in and around Finkley, please call 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Hampshire. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. For nearby work, see our Southampton page (22 miles or so).
Jobs for external mastic in SP11 works the same way as everywhere else we cover. Other places close to Finkley include Smannell (1 mile north-west), Finkley Down (1 mile south), Picket Piece (1 mile south-east), East Anton (1 mile south-west) and Little London (1 mile north-west). We also work in nearby towns such as Basingstoke (15 miles east), Winchester (13 miles south-east), Hyde (13 miles south-east), Tidworth (9 miles west), Weeke (12 miles south-east) and Kempshott (13 miles east).
Local landmarks in Finkley
Around Finkley, our work takes us to homes and buildings near The Oak pub and Winton Community Academy, among other places. The nearest railway station is Andover station, about 2.4 miles south-west. Nearby you’ll also find Finkley Down Farm Museum (0.8 miles south) and Andover War Memorial Hospital (2.4 miles south-west). Open spaces near Finkley include Mill Lake and Anton Lakes.