Oxfordshire · England
External & façade joints in Ashampstead, Oxfordshire
Professional external mastic in and around Ashampstead, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
Ashampstead: your questions answered
Can you do external mastic in Ashampstead?
Yes. We work across London and the South East, and Ashampstead is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Do you cover smaller places like Ashampstead?
Yes. Ashampstead is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before any work starts.
Should I point up the gap in my brickwork?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Are you insured?
Yes. We’re fully insured.
Do you seal joints where cladding meets other 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.
About our external mastic in Ashampstead
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on brickwork movement joints, copings & trims and render & cladding joints, and people most often call us about old sealant gone brittle and cracked and failed seals between different materials.
External sealant needs dry, clean surfaces, so work around Ashampstead is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Big or small, you get the same 12-month guarantee.
- Where
- Ashampstead (RG8)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Landlords, agents and businesses in Ashampstead
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
Quotes for external mastic in Ashampstead
Your quote is based on your job. We take into account:
- The amount of work
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- Which sealant suits the joint
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- Where the job is, and your postcode
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details, and pictures are welcome.
Looking after it afterwards
To keep the joints looking good and working properly:
- Never let anyone fill a movement joint with mortar
- Check external joints each spring
- Check the sealant is paintable before painting near it
- Keep soil, plants and ivy away from the joints
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick, all bigger jobs than a reseal.
Places near Ashampstead
Also in Ashampstead
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Subsidence or other structural problems
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Façade panels
Walls and rooflines in Ashampstead
Historic houses like Basildon Park (about 2.9 miles east) are a reminder that the area around Ashampstead has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Clement, an extension built onto an older house moves differently, and the joint between them takes the strain.
Ashampstead is about 7 miles north-east of Thatcham, in Oxfordshire. Homes, rented property, offices and hotels in Ashampstead can book us for external mastic. Every job comes with our 12-month guarantee. Across Oxfordshire, we cover 443 places, and Ashampstead is one of them. We also work in Reading, around 10 miles away.
Every address in RG8 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Chapel Lane, Noakes Hill and Church Lane or anywhere close by, our applicators can take on the job. Neighbouring places we cover for external mastic include Ashampstead Green (1 mile north), Stubbles (1 mile south-east), Burnt Hill (2 miles south), Upper Basildon (2 miles east) and New Town (3 miles east). Larger places within reach include Didcot (9 miles north), Abingdon-on-Thames (14 miles north), Wantage (12 miles north-west), Henley-on-Thames (12 miles east), Grove (13 miles north-west) and Benson (10 miles north).
Local landmarks in Ashampstead
The nearest railway station is Goring & Streatley station, about 3.2 miles north-east of the centre. Well-known places in the area include Yattendon Castle (1.7 miles south-west). Not far away are Hartslock.
Do you need external mastic in Ashampstead?
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
If you can see any of these, it’s time to have the joints looked at:
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
- Joints with sealant missing in places
- Weathered mastic that no longer stretches
Letting a property close to Goring & Streatley station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- Whether they seal over old material or remove it
- How hidden problems are handled
- What guarantee comes with the work
- Who turns up on the day
How it works
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. For a village or hamlet like Ashampstead, 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 start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.