Oxfordshire · England
External Mastic in Upper Basildon
Professional external mastic in and around Upper Basildon, with old sealant always removed completely and a 12-month guarantee.
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
- Sealant pulling away from one side of the joint
About our external mastic in Upper Basildon
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. If you have damp patches traced to an open external joint and movement joints with cracked, split or missing sealant, we can help, whatever the surface.
External sealant needs dry, clean surfaces, so work around Upper Basildon is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Every job comes with a 12-month guarantee.
- Where
- Upper Basildon (RG8)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for external mastic in Upper Basildon
Some jobs are bigger than they look, and some smaller. The main factors:
- Any working-time requirements on site
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- Whether the work is at height
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- If someone has resealed it before
- A few pictures by email, if you can
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Places near Upper Basildon
More services for Upper Basildon
What sealant work cannot fix
Before you book, it’s worth knowing the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Loose or hollow render, which needs re-rendering
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Façade panels
What we are called out for in Upper Basildon
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
It’s worth asking for a quote if you see:
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Leaking joints around cladding and façade panels
For landlords with property near Pangbourne station, outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Whether you can choose the colour
- How hidden problems are handled
- What insurance they hold
- What the quote includes, VAT included or not
Upper Basildon: your questions answered
Do you cover Upper Basildon for external mastic?
Yes, Upper Basildon is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Will you come out to Upper Basildon?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
Can you do several jobs on one visit?
Yes. Just list everything you need and you will get one quote.
Are you fully insured?
Yes. Mr Mastic is fully insured.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away and have them redone then.
How long will you be here?
A typical job takes a few hours for a handful of joints, longer for a whole elevation. We’ll confirm how long when we quote.
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.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Upper Basildon buildings and the weather
Historic houses like Basildon Park (about 1.4 miles north-east) are a reminder that the area around Upper Basildon has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Schools such as Basildon C.E. Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around St Stephen's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Upper Basildon is about 7 miles north-east of Thatcham, in Oxfordshire. We carry out external mastic for homeowners, landlords and businesses in Upper Basildon and nearby, as part of our work across Oxfordshire. We cover 443 towns and villages across Oxfordshire. Reading is on our list too, around 8 miles away.
Work in RG8 works the same way as everywhere else we cover. If you need external mastic at a property on Aldworth Road, Beckfords and Emery Acres or a nearby road, our applicators can take on the job. Other places close to Upper Basildon include New Town (1 mile south-east), Stubbles (1 mile west), Ashampstead (2 miles west), Ashampstead Green (2 miles west) and Burnt Hill (2 miles south-west). Further out, we also cover Didcot (10 miles north-west), Abingdon-on-Thames (15 miles north-west), Wantage (14 miles north-west), Henley-on-Thames (11 miles east), Grove (15 miles north-west) and Benson (10 miles north).
Landmarks near Upper Basildon
Around Upper Basildon, our work takes us to homes and buildings near St Andrew's School and The Red Lion pub, among other places. The closest station to Upper Basildon is Pangbourne station, about 2.3 miles east of the centre. A little further out are Yattendon Castle (2.9 miles south-west). Open spaces near Upper Basildon include Hartslock.
Landlords, agents and businesses in Upper Basildon
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
What we do, step by step
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. For a village or hamlet like Upper Basildon, 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
- On commercial sites, let us know about site rules
Getting a quote
For external mastic in Upper Basildon, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Read more
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost near the open joint, so the damage spreads beyond the joint. Older cottages and farmhouses around Upper Basildon can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why Upper Basildon clients choose us
- We agree the colour with you first
- Every job guaranteed for a year
- We leave the area clean and tidy
- Homes, businesses and hotels
Read our cost guide and customer reviews.