Hampshire · England
Anthill Common External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for householders, landlords and businesses in Anthill Common. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Old sealant gone brittle and cracked
- Plants rooting in failed movement joints
- Brick movement joints where the sealant has split
External mastic in Anthill Common
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. Common call-outs are for failed sealant between panels on a façade and weeds or debris growing in open joints, on joints between brick and frames, copings & trims and concrete & block.
Older homes in small places like Anthill Common may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
There’s a 12-month guarantee on every job, large or small.
- Location
- Anthill Common (PO7)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
Before you book, it’s worth knowing the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Subsidence or other structural problems
- Adding movement joints to masonry that has none
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Façade panels
- Joints between brick and frames
Do you need external mastic in Anthill Common?
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Old sealant gone brittle and cracked
- Rigid filler in a joint that should flex
- Moss and dirt in joints with no sealant left
- Water getting into walls through failed joints
If you let a flat or house near Portchester station, outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before booking
- Who turns up on the day
- Whether the sealant suits the joint
- Is VAT in the price?
- How hidden problems are handled
Landlord and commercial work in Anthill Common
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Landlords and agents in Anthill Common can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Common questions in Anthill Common
Do you cover Anthill Common for external mastic?
Yes. We work across London and the South East, and Anthill Common is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Portchester station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best.
What is a movement joint?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Nearby places to Anthill Common
Also in Anthill Common
Looking after it afterwards
Looking after new joints is easy:
- Avoid pressure-washing directly into sealant joints
- Keep soil, plants and ivy away from the joints
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
Don’t paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint and spoil the finish.
Once a joint can’t move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. For a village or hamlet like Anthill Common, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Tell us if parking is tricky
- Clear items away from the joints we’re working on
- Let us know if you’ve seen damp or leaks
Get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and send you a clear quote.
Read more
Anthill Common buildings and the weather
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 live in an older home near Church of All Saints, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Anthill Common is about 3 miles north-west of Waterlooville, in Hampshire. Every kind of property in Anthill Common is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Anthill Common is one of 683 places in Hampshire where we work. For nearby work, see our Portsmouth page.
Our applicators cover all of PO7 for external mastic and the streets around it. That includes homes and businesses on Broad Lane, School Lane and Uplands Road. Close by, we work in Denmead (1 mile south-east), Hambledon (1 mile north), Anmore (2 miles east), Wecock Farm (2 miles east) and Lovedean (3 miles east). We also work in nearby towns such as Winchester (14 miles north-west), Gosport (8 miles south), Havant (5 miles south-east), Eastleigh (12 miles west), Fareham (6 miles south-west) and Chandler's Ford (14 miles west).
Around Anthill Common
Typical jobs here are in homes near Fox and Hounds pub, among other places. The closest station to Anthill Common is Portchester station, about 4.6 miles south of the centre. Well-known places in the area include Queen Alexandra Hospital (4.2 miles south). Open spaces near Anthill Common include St Clair's Meadow and Portsdown Hill.
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- How much there is to do
- Working hours on commercial sites
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
To make quoting easier, please include:
- Photos by email, if that is easy
- How we’d reach the joints
- The problem you’ve noticed
- Whether it’s a home or a business
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or drop us an email with the details and send pictures if you have them.