Hampshire · England
Little Posbrook External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Little Posbrook, with a 12-month guarantee on every job. Ask us for a quote.
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
Your questions about external mastic in Little Posbrook
Is external mastic in a coastal place like Little Posbrook any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Little Posbrook?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
What should I tell you?
A short description and the location. If we need more, we’ll ask.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
External mastic in Little Posbrook
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. Common call-outs are for hard, crazed mastic that has stopped moving and gaps where render, brick and frames meet, on façade panels, brickwork movement joints and concrete & block.
Older homes in small places like Little Posbrook may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Little Posbrook (PO14)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
External mastic in Little Posbrook: local notes
Little Posbrook is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Stubbington House School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near Fareham station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Little Posbrook is about 2 miles south-west of Fareham, in Hampshire. We provide external mastic to homes and businesses in Little Posbrook, as part of our work across Hampshire. 683 places in Hampshire are on our list, from the larger towns to small villages. There’s also a page for Portsmouth, roughly 8 miles from Little Posbrook.
Work in PO14 is quoted and booked the same way as anywhere else. Neighbouring places we cover for external mastic include Titchfield (1 mile north), Abshot (1 mile north-west), Hill Head (1 mile south-east), Stubbington (1 mile south-east) and Titchfield Common (2 miles north-west). Further out, we also cover Gosport (5 miles south-east), Havant (11 miles east), Eastleigh (10 miles north-west), Horndean (11 miles north-east), Totton (13 miles north-west) and Chandler's Ford (12 miles north-west).
What’s near Little Posbrook
In Little Posbrook, that means homes and buildings near Coach & Horses pub and Crofton School and the streets around them. Little Posbrook’s nearest station is Fareham station, about 2.6 miles north-east of the centre. A little further out are Fareham Community Hospital (2.8 miles north-west) and Fareham Shopping Centre (3.2 miles north-east). Green spaces nearby include Holly Hill Woodland Park.
Why deal with it now?
Sealing over the top of old mastic does not hold for long. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Around Little Posbrook, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why Little Posbrook clients choose us
- White, clear, grey or coloured to suit, where the product allows
- Over 20 years’ experience
- You choose the colour before work begins
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide and customer reviews.
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- The type of sealant required
- Working hours on commercial sites
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 play a part, and we’ll explain the quote if you ask.
Asking for a quote
What to tell us when you ask for a quote:
- Roughly how big the job is
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- What’s wrong with the joints now
To get a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Check the sealant is paintable before painting near it
- Keep high-pressure jets off the joints
- Never let anyone fill a movement joint with mortar
- Act on the first splits you see
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Common problems we fix in Little Posbrook
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Keep an eye out for any of the following:
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
In the older streets around Church of St Peter, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- Are they insured?
- Is the old sealant removed completely?
- Whether the sealant suits the joint
- How long to leave it before use
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Nearby places to Little Posbrook
Other services in Little Posbrook
Landlords, agents and businesses in Little Posbrook
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
For anyone letting property in or around Little Posbrook, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
What happens on the day
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Little Posbrook, 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.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work.