Hampshire · England
External & façade joints in Kingsmead, Hampshire
We cover Kingsmead for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Joints with sealant missing in places
- Plants rooting in failed movement joints
- Panel joints letting water in
External mastic in Kingsmead, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the line blends in. If you are dealing with gaps where render, brick and frames meet and weathered mastic that no longer stretches, we can help.
Around Kingsmead, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Your job is guaranteed for a year, as with all our work.
- Location
- Kingsmead (PO17)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Kingsmead, the journey is planned in advance: 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 look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work.
Read more
Your questions about external mastic in Kingsmead
Is Kingsmead within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Botley station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Are you insured?
Yes. We’re fully insured.
Should I point up the gap in my brickwork?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you when we finish.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
How much does external mastic cost in Kingsmead?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
- Keep water from gutters off the wall
- Point out the joints to other trades
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
Different surfaces, different methods
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Cladding and façade panels
Where a cladding system has its own specified sealant, we follow it, or one the system allows. Send us any details you have about the façade.
When it is not the sealant
It helps to know what we cannot do:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
- Adding movement joints to masonry that has none
If you’re not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Kingsmead
- Render & cladding joints
- Copings & trims
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Where a wall is exposed, as many are in small places like Kingsmead, 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 choose Mr Mastic in Kingsmead
- Domestic, commercial and hotel work
- We agree the colour with you first
- Rated 4.9 stars on Google
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost and customer reviews.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. 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.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Places near Kingsmead
Other services in Kingsmead
What external mastic looks like in Kingsmead
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Botley station, outside joints that have cracked can let damp into a rental, so check them between lets.
Kingsmead is about 5 miles north of Fareham, in Hampshire. Whether you’re in the middle of Kingsmead or further out, we cover external mastic for every kind of property. Our area takes in 683 places across Hampshire. Portsmouth is on our list too, about 9 miles from Kingsmead.
Every address in PO17 is covered for external mastic, from the main roads to the quietest streets. Neighbouring places we cover for external mastic include Woodend (1 mile east), Mislingford (1 mile north), Shirrell Heath (1 mile west), Soberton Heath (1 mile east) and Shedfield (1 mile west). Further out, we also cover Winchester (12 miles north-west), Gosport (8 miles south), Havant (9 miles south-east), Eastleigh (8 miles north-west), Fareham (5 miles south) and Horndean (7 miles east).
What’s near Kingsmead
Locally, jobs take us to homes and businesses close to The Roebuck pub and the streets around them. The nearest railway station is Botley station, about 4 miles west. Nearby you’ll also find Bishop's Waltham Museum (3.2 miles north-west) and Knowle Hospital (3.1 miles south-west). Green spaces nearby include Portsdown Hill and St Clair's Meadow.
When to call us in Kingsmead
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Brick movement joints where the sealant has split
- Leaking joints around cladding and façade panels
Schools such as Swanmore College of Technology are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- What insurance they hold
- How the surfaces are prepared before sealing
- The length of the guarantee
- What the cure time is