Southampton · England
Mansbridge External Mastic
External mastic across Mansbridge and nearby, with old sealant always removed completely and a 12-month guarantee.
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
- Gaps where render, brick and frames meet
About our external mastic in Mansbridge
Low-level joints can usually be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. Common call-outs are for plants rooting in failed movement joints and joints where the bead has come unstuck, across copings & trims, joints between brick and frames and concrete & block.
In a smaller place like Mansbridge, some homes face open ground, and walls and rooflines facing the weather take the worst of it. That is where gutter joints and wall joints tend to fail first.
You get a 12-month guarantee, the same in Mansbridge as everywhere else we work.
- Place
- Mansbridge (SO18, SO16, SO17)
- Region
- Southampton
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. For a job in Mansbridge, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Related advice
What external mastic looks like in Mansbridge
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. With historic houses such as South Stoneham House (about 0.5 miles west) nearby, there’s older building stock in the area around Mansbridge as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For site and facilities teams at buildings such as Mansbridge Primary School, larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Swaythling station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Mansbridge is about 2 miles north-east of Southampton, in Southampton. Homes, rented property, offices and hotels in Mansbridge can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Mansbridge is one of 40 places in Southampton where we work.
Postcode districts we cover here for external mastic: SO18, SO16 and SO17. Whether your property is on Wide Lane, Dart Road and Copse Road or a nearby road, we can help. Main roads around Mansbridge include the A27. Neighbouring places we cover for external mastic include Townhill Park (1 mile south-east), Swaythling (1 mile west), Midanbury (1 mile south), Chartwell Green (1 mile south-east) and Bitterne Park (1 mile south). Larger places within reach include Shirley (3 miles west), Regents Park (3 miles west), Sholing (3 miles south), Maybush (4 miles west), Woolston (3 miles south) and Coxford (3 miles west).
Landmarks near Mansbridge
Typical jobs here are in homes near The Gregg School, Bitterne Park School and Riverside Park, among other places. For rail, the closest station is Swaythling station, about 0.6 miles north-west of the centre. Nearby you will also find Bitterne Local History Society Heritage And Research Centre (1.6 miles south) and Netley Castle (4.1 miles south). Not far away are Netley Common.
Aftercare tips
To keep the joints looking good and working properly:
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
- Ask before painting over external sealant
- Don’t let climbing plants root in the sealant
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a smaller place like Mansbridge, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Mansbridge
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
- Fully insured
- Experience in homes, commercial sites and hotels
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
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.
When to call us in Mansbridge
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Common reasons people contact us are:
- Weeds or debris growing in open joints
- Sealant that has lost its bond to the brick or render
- Failed seals between different materials
- Failed sealant between panels on a façade
If you live in an older home near St. Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- Is VAT in the price?
- The length of the guarantee
- What insurance they hold
- Who turns up on the day
Questions from Mansbridge
Will you come out to Mansbridge?
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.
Do you cover Mansbridge for external mastic?
Yes, Mansbridge is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Is the work guaranteed?
Yes, always. Each job is guaranteed for twelve months.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Where do you work from?
Mr Mastic is based in Crawley. We cover Mansbridge and the rest of Southampton.
Are you fully insured?
Yes. We’re fully insured.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Quotes for external mastic in Mansbridge
Your quote is based on your job. We take into account:
- Any mould that needs treating
- The old material and how stubborn it is
- Access and height
- Which sealant suits the joint
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before we start.
Helping us quote
When you contact us, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- The address or postcode of the job
- How many joints, rooms or windows are involved
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details.
What the job involves on each surface
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. Priming is done where the sealant calls for it.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap and keep the sealant to the right depth.