Hampshire · England
External & façade joints in Shawford, Hampshire
External mastic across Shawford and nearby, with every bit of old sealant taken out first.
- Joints with sealant missing in places
- Plants rooting in failed movement joints
- Weathered mastic that no longer stretches
Looking after it afterwards
To keep the joints looking good and working properly:
- Show decorators and builders where the movement joints are
- Walk round the building once a year and look at the joints
- Clear growth from the base of walls and joints
- Make sure movement joints aren’t pointed over
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
External mastic for homes and businesses in Shawford
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. We work on render & cladding joints, façade panels and copings & trims, and the jobs we see most are weeds or debris growing in open joints and leaking joints around cladding and façade panels.
Around Shawford, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points.
Every job comes with our 12-month guarantee.
- Location
- Shawford (SO21)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What external mastic looks like in Shawford
Compared with the north and west, the South East gets less rain, 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 Shawford station, outside joints that have cracked can let damp into a rental, so check them between lets. For site and facilities teams at buildings such as Compton All Saints Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Shawford is about 3 miles south of Winchester, in Hampshire. Across the SO21 area, our applicators can take on external mastic. Our area takes in 683 places across Hampshire, large and small. You can also see our page for Southampton, roughly 8 miles from Shawford.
Postcode districts we cover here for external mastic: SO21. You will find streets such as Shawford Road and Pearson Lane, all of which we cover. Other places close to Shawford include Compton (1 mile west), Twyford (1 mile south-east), South Down (1 mile south-west), Otterbourne (1 mile south-west) and St Cross (2 miles north). We also work in nearby towns such as Winchester (3 miles north), Eastleigh (4 miles south), Fareham (13 miles south-east), Andover (15 miles north-west), Totton (11 miles south-west) and Chandler's Ford (4 miles south-west).
What’s near Shawford
In Shawford, that means homes and buildings near The Bridge Inn and St. Cross Park. There’s a railway station in Shawford itself: Shawford station. Well-known places in the area include The Gurkha Museum (2.3 miles north) and Royal Hampshire County Hospital (2.7 miles north). The countryside around Shawford includes Twyford Down and Hockley Meadows.
What affects the cost of external mastic
You will get a clear quote before work begins. It’s based on:
- Which sealant suits the joint
- The old material and how stubborn it is
- Whether the work is at height
- Mould in or behind the old joints
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The type of property
- Any previous sealing or DIY work
- A few photos by email, if you can
- How many joints, rooms or windows are involved
Want a quote for external mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear quote before we start.
How the visit works
You don’t need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. Somewhere as small as Shawford, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Tell us about any previous sealing or DIY attempts
Getting a quote
For external mastic in Shawford, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Related advice
Shawford questions
Do you cover smaller places like Shawford?
Yes, Shawford is covered. 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.
Do you cover Shawford for external mastic?
Yes. We work across London and the South East, and Shawford is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces, primed where needed.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
Common problems we fix in Shawford
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Keep an eye out for any of the following:
- Leaking joints around cladding and façade panels
- Failed seals between different materials
- Rigid filler in a joint that should flex
- Joints where the bead has come unstuck
For an older house near a landmark such as Church of St Mary, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- Who turns up on the day
- Are they insured?
- Whether VAT is included
- Whether they seal over old material or remove it
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Render that is blown, hollow or coming away
- Adding movement joints to masonry that has none
- Cracked brickwork or render that needs a builder or plasterer
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Surfaces we seal
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Concrete & block
- Copings & trims
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed 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, then guaranteed for a year.
Leave it or put it right?
A failed movement joint lets water into the wall. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Around Shawford, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Colour agreed with you before we start
- Over 20 years’ experience
- A choice of colours where the product allows
- 12-month guarantee on every job
Take a look at our cost guide or what customers say.