Hampshire · England
External Mastic in Hedge End
Sealing brickwork movement joints, render, cladding and façade joints for Hedge End, backed by a 12-month guarantee. Ask us for a quote.
- Rigid filler in a joint that should flex
- Failed seals between different materials
- Panel joints letting water in
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
How we handle external mastic in Hedge End
Getting the depth right is half the job. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We work on façade panels, render & cladding joints and concrete & block, and people most often call us about movement joints filled with mortar instead of sealant and sealant that has lost its bond to the brick or render.
Extensions are a common sight on houses around Hedge End, and the line where an extension meets the original house is a common leak point. Sealing it properly means the right joint depth and a flexible sealant, not a quick bead.
Every job comes with a 12-month guarantee.
- Place
- Hedge End (SO30, SO31)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Walls and rooflines in Hedge End
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like South Stoneham House (about 3.5 miles north-west) are a reminder that the area around Hedge End has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near Hedge End station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as Shamblehurst Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Hedge End is about 4 miles east of Southampton, in Hampshire. For external mastic in and around Hedge End, please ring 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base. 683 places in Hampshire are on our list.
Here we cover the SO30 and SO31 postcode area for external mastic. External mastic is available to properties on Lynton Road, Watts Road and Dean Court. Hedge End is on the A334 and B3033, which makes it straightforward to reach. If you’re just outside Hedge End, we cover Thornhill (2 miles west), Harefield (2 miles west), West End (2 miles north-west), Chartwell Green (2 miles north-west) and Sholing (3 miles south-west). Within a short drive, we also cover Winchester (10 miles north), Gosport (10 miles south-east), Havant (14 miles east), Eastleigh (4 miles north-west), Fareham (6 miles south-east) and Horndean (13 miles east).
Around Hedge End
Typical jobs here are in homes near Wildern School and Wildern School. For rail, the closest station is Hedge End station, roughly 1.2 miles north of the centre. Nearby you will also find Netley Castle (3.6 miles south-west) and Bursledon Brickworks Industrial Museum (2 miles south). Open spaces near Hedge End include Netley Common.
When to call us in Hedge End
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall.
People normally contact us when they notice something like this:
- Brick movement joints where the sealant has split
- Rain getting behind render or cladding at a joint
- Cracked joints where brick meets render or frames
- Leaking joints around cladding and façade panels
Homes close to Church of St John the Evangelist include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- Whether all the old sealant comes out first
- Which colour the sealant will be
- What preparation is included
- What guarantee comes with the work
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Copings & trims
The process
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a few hours to a few days, depending on the length of joint and the access. A visit in Hedge End needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Tell us about any water getting in
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
Get a quote
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. You will have a clear quote before we start.
Read more
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What you get with us
- 4.9 on Google from 180+ five-star reviews
- Anti-fungal sanitary silicone in wet areas
- We leave the area clean and tidy
- Trusted Arbo and Everbuild sealants
Read our cost guide and customer reviews.
Nearby places to Hedge End
Also in Hedge End
What affects the quote in Hedge End
The price is agreed before any work begins. It takes into account:
- How many areas need sealing
- The product the joint needs
- How easy the joints are to reach
- The size of the job
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 make a difference.
Asking for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- Any access issues, like height or stairs
- Photos by email, if that’s easy
- Where the property is
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
Hedge End: your questions answered
Is there a guarantee on external mastic in Hedge End?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
I let a flat near Hedge End station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Where do you work from?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. We remove it all first.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or send us an email with a short description of the job.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
Landlord and commercial work in Hedge End
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.