Hampshire · England
External Mastic in The Hangers
External mastic for The Hangers and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Joints where the bead has come unstuck
- Failed seals between different materials
- Water getting into walls through failed joints
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
External mastic for homes and businesses in The Hangers
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. We work on brickwork movement joints, façade panels and copings & trims, and people most often call us about rigid filler in a joint that should flex and rain getting behind render or cladding at a joint.
Older homes in small places like The Hangers may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
A one-year guarantee comes as standard, so you’re covered after we have gone.
- Where
- The Hangers (SO32)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Ask before painting over external sealant
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
- Clear growth from the base of walls and joints
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Once a joint cannot move, the wall finds another way, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Walls and rooflines in The Hangers
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Bishops Waltham Infant School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
The Hangers is about 6 miles north-east of Hedge End, in Hampshire. If you need external mastic in The Hangers, please call 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Hampshire, The Hangers included. The Hangers is one of 683 towns and villages in Hampshire we cover for external mastic. You can also see our page for Southampton, roughly 10 miles from The Hangers.
We work across SO32 for external mastic. Other places close to The Hangers include Dean (1 mile west), Upper Swanmore (1 mile south-east), Swanmore (2 miles south), Hill Grove (2 miles south) and Droxford (2 miles east). Further out, we also cover Winchester (8 miles north-west), Gosport (11 miles south), Havant (11 miles south-east), Eastleigh (7 miles west), Fareham (8 miles south) and Horndean (9 miles south-east).
Landmarks near The Hangers
In The Hangers, that means homes and buildings near Swanmore College of Technology. The Hangers’s nearest station is Botley station, roughly 4.7 miles south-west. Other landmarks nearby include Bishop's Waltham Museum (1.6 miles south-west). Not far away are Beacon Hill and Bishops Waltham Branch LNR.
Signs you need external mastic in The Hangers
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
These are the problems we’re asked about most:
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
- Panel joints letting water in
If you let a flat or house near Botley station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- How hidden problems are handled
- How much experience the applicator has
- Whether they’re fully insured
- What the quote includes, VAT included or not
How the visit works
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like The Hangers needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- 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 about any water getting in
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
How to get a quote
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Related advice
Questions from The Hangers
I let a flat near Botley station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Is The Hangers in your area for external mastic?
Yes. Our work covers London and the South East, and The Hangers is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can you reach joints on upper floors?
It depends on the building. Where joints can be reached safely, we’ll do them. Give us some details and we will confirm the access.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and reseal when it splits.
How do I get a quote for external mastic in The Hangers?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
Are you fully insured?
Yes. Full insurance covers our work.
Leave it or put it right?
Resealing a run of joints in one go is generally better than patching one at a time. Joints of the same age tend to fail together and it means sorting access once. Around The Hangers, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in The Hangers
- We’re fully insured
- We agree the colour with you first
- Anti-fungal silicone where joints get wet
- 20+ years of sealant experience
Take a look at what affects the cost and our reviews.
Different surfaces, different methods
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so neither cracks the other.
For landlords and businesses
Housing providers, facilities teams and property managers book us too in The Hangers and across Hampshire. Several sites can go on one quote, and we’re fully insured for the work.
For anyone letting property in or around The Hangers, several properties can be quoted together. Send us the addresses and the work at each.