Hampshire · England
External & façade joints in Broughton, Hampshire
External mastic for Broughton, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
External mastic in Broughton
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what access is needed. We work on copings & trims, façade panels and joints between brick and frames, and the jobs we see most are hard, crazed mastic that has stopped moving and sealant pulling away from one side of the joint.
Older homes in small places like Broughton may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water usually gets in, and they need the right sealant at the right depth.
You get a one-year guarantee, the same in Broughton as everywhere else we work.
- Place
- Broughton (SO20)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Broughton
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Where a wall is exposed, as many are in small places like Broughton, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
What you get with us
- We leave the area clean and tidy
- White, clear, grey or coloured to suit, where the product allows
- 180+ five-star Google reviews
- Approved under the ARBOMaster scheme
Read our cost guide and what customers say.
Nearby places to Broughton
What else we do in Broughton
Outside joints around Broughton
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Mottisfont Abbey (about 3.9 miles south) are a reminder that the area around Broughton has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
In the older streets around Church of St Mary the Virgin, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Mottisfont & Dunbridge station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Broughton is about 8 miles north-west of Romsey, in Hampshire. Anywhere in SO20, we can carry out external mastic at your property. Broughton is one of 683 places in Hampshire we cover. You can also see our page for Southampton, roughly 14 miles from Broughton.
Work in SO20 works the same way as everywhere else we cover. Streets in the area include High Street, Greyhound Mews and Plough Gardens. Neighbouring places we cover for external mastic include Houghton (2 miles east), Horsebridge (3 miles south-east), Mottisfont (4 miles south), Stonymarsh (4 miles south-east) and Lockerley (4 miles south). We also work in nearby towns such as Winchester (11 miles east), Eastleigh (13 miles south-east), Andover (9 miles north-east), Totton (12 miles south), Chandler's Ford (11 miles south-east) and Romsey (8 miles south-east).
Landmarks near Broughton
Typical jobs here are in homes near The Tally Ho Public House and the streets around them. The closest station to Broughton is Mottisfont & Dunbridge station, about 4.3 miles south.
When something else is needed
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
- Cracks in the bricks or render themselves, away from the joints
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Broughton
- Façade panels
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
How the job changes by surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to several days, depending on the building, including the tidy-up. Somewhere as small as Broughton, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, the joints are inspected and the access agreed.
- 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.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work before giving you a price.
Related advice
Your questions about external mastic in Broughton
Do you cover smaller places like Broughton?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Mottisfont & Dunbridge station. Can you help?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you have insurance?
Yes. We’re fully insured.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Landlord and commercial work in Broughton
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Do you need external mastic in Broughton?
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
The problems people normally mention when they call are:
- Movement joints with cracked, split or missing sealant
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
For site and facilities teams at buildings such as Broughton Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- Is VAT in the price?
- Is the old sealant removed completely?
- The length of the guarantee
- When the joint can take water or movement