Hampshire · England
Broadgate External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Broadgate and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Damp patches traced to an open external joint
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Render that’s blown, hollow or coming away
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Walls that need new movement joints cut into them
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
What we seal
- Render & cladding joints
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
How we handle external mastic in Broadgate
A movement joint is only as good as its depth. 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. If you’re dealing with leaking joints around cladding and façade panels and sealant pulling away from one side of the joint, we can help, whatever the surface.
Somewhere as small as Broadgate, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Each job carries a 12-month guarantee.
- Location
- Broadgate (SO51)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Your questions about external mastic in Broadgate
Can you do external mastic in Broadgate?
Yes, Broadgate is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Chandlers Ford station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Broadgate and the rest of Hampshire, along with the rest of our area.
Can you reach joints on upper floors?
That depends on the building and the joints. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Looking after it afterwards
After the cure time, these simple habits help:
- Keep water from gutters off the wall
- Leave the joints unpainted unless we have said otherwise
- Tell anyone working on the walls about the movement joints
- Never let anyone fill a movement joint with mortar
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.
For landlords and businesses
Letting agents and landlords in Broadgate can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
If you manage several properties in or around Broadgate, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.
What affects the quote in Broadgate
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How many areas need sealing
- The product the joint needs
- Any working-time requirements on site
- Whether there’s mould to deal with
Doing several joints on one visit is usually more efficient than separate visits. You’ll get one clear quote for the whole job.
What we need to know
Photos by email are helpful but not essential. Please mention:
- Access, such as stairs, a lift or height
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details, and photos are welcome.
What external mastic looks like in Broadgate
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like South Stoneham House (about 4.9 miles south) are a reminder that the area around Broadgate has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
In the older streets around Church of St Mark, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Chandlers Ford station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Broadgate is about 2 miles north-west of Chandler's Ford, in Hampshire. From the centre of Broadgate to the outskirts, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 683 places in Hampshire are on our list. We also work in Southampton, about 6 miles from Broadgate.
Work in SO51 works the same way as everywhere else we cover. That includes homes and businesses on Hook Road, Broadgate Farm and Woodlea Way and the roads around them. We also cover the places around Broadgate: Knapp (1 mile north-west), Ampfield (1 mile west), Gosport (1 mile west), Crampmoor (2 miles west) and Lower Slackstead (2 miles north-west). Further out, we also cover Winchester (6 miles north-east), Eastleigh (4 miles south-east), Fareham (14 miles south-east), Andover (15 miles north), Totton (7 miles south-west) and Hedge End (8 miles south-east).
What’s near Broadgate
Locally, jobs take us to homes and businesses close to White Horse Public House and Thornden School. The closest station to Broadgate is Chandlers Ford station, about 1.8 miles south-east. Nearby you’ll also find Romsey Community Hospital (3.2 miles west) and Eastleigh Museum (3.5 miles south-east). The countryside around Broadgate includes Flexford Nature Reserve.
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Where a wall is exposed, as many are in small places like Broadgate, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Why Broadgate clients choose us
- Colour picked to suit the job
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
See what affects the cost and what customers say.
Places near Broadgate
Other services in Broadgate
Do you need external mastic in Broadgate?
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
The most common problems we see are:
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
- Sealant pulling away from one side of the joint
- Movement joints filled with mortar instead of sealant
If you look after a building such as Ampfield Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- How the colour is chosen
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- How long the guarantee is
What we do, step by step
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Broadgate, 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 start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
- Mention any tricky access
Getting a quote
For external mastic in Broadgate, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.