Oxfordshire · England
Uffington External Mastic
External mastic in Uffington from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
- Plants rooting in failed movement joints
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
- Fix overflowing gutters above sealed joints
- Never let anyone fill a movement joint with mortar
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
External mastic in Uffington, 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 joint doesn’t stand out. We work on façade panels, render & cladding joints and concrete & block, and the jobs we see most are joints pointed up with cement by mistake and weathered mastic that no longer stretches.
Outside joints can only be sealed when they’re dry, so work in Uffington is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
All our work is covered by a one-year guarantee, wherever you are in Oxfordshire.
- Location
- Uffington (SN7)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
For anyone letting property in or around Uffington, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
DIY versus a professional finish
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.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Common problems we fix in Uffington
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
The problems people usually mention when they call include:
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
Schools such as Uffington Church of England Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Before booking anyone
- Whether VAT is included
- What guarantee comes with the work
- What insurance they hold
- Which colour the sealant will be
Surface by surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Questions from Uffington
What guarantee comes with external mastic in Uffington?
All our work, in Uffington and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you cover Uffington for external mastic?
Yes. Our work covers London and the South East, and Uffington is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
Also near Uffington
Other services in Uffington
What external mastic looks like in Uffington
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. With historic houses such as Ashdown House (about 4.8 miles south) nearby, there’s older building stock in the area around Uffington as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Church of St Mary, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Uffington is about 6 miles west of Wantage, in Oxfordshire. Whether you are in the middle of Uffington or further out, we cover external mastic for every kind of property. Uffington is one of 443 towns and villages in Oxfordshire where we work. Our Oxford page covers work nearby, about 17 miles away.
Our applicators cover all of SN7 for external mastic. If you need external mastic at a property on High Street, Station Road and White Horse or anywhere close by, our applicators can take on the job. If you’re just outside Uffington, we cover Baulking (1 mile north-east), Fernham (2 miles north-west), Shellingford (3 miles north), Little Coxwell (3 miles north-west) and Stanford in the Vale (3 miles north-east). Larger places within reach include Didcot (13 miles east), Abingdon-on-Thames (13 miles north-east), Witney (13 miles north), Carterton (11 miles north), Wantage (6 miles east) and Grove (6 miles east).
Landmarks near Uffington
Typical jobs here are in homes near The Baker's Arms. Well-known places in the area include Uffington Museum (under half a mile west) and Faringdon Castle (4 miles north). Open spaces near Uffington include Seven Barrows and Dragon Hill.
Honest limits
To be straight with you, some problems need a different trade:
- Damp that isn’t coming from the joint
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Uffington
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building, and the area is left clean. For a village or hamlet like Uffington, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Clear items away from the joints we are working on
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
Get a quote
For external mastic in Uffington, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.