Oxfordshire · England
External Mastic in Checkendon
External mastic across Checkendon and nearby, with old sealant always removed completely and a 12-month guarantee.
- Movement joints with cracked, split or missing sealant
- Joints where the bead has come unstuck
- Failed seals between different materials
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Rising or penetrating damp from elsewhere in the wall
- Subsidence or other structural problems
- Cracked brickwork or render that needs a builder or plasterer
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
About our external mastic in Checkendon
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a matching colour. We work on concrete & block, render & cladding joints and façade panels, and the jobs we see most are damp patches traced to an open external joint and joints pointed up with cement by mistake.
Somewhere as small as Checkendon, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Checkendon (RG8)
- Region
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Checkendon
Can you do external mastic in Checkendon?
Yes, Checkendon is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Goring & Streatley station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Can a movement joint be filled with mortar?
No. Rigid materials cannot move with the wall, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Is there a guarantee?
Yes. Every job comes with our one-year guarantee.
How long does external mastic last?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and reseal when it splits.
How do I get a quote for external mastic in Checkendon?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or send us an email and tell us what needs doing and where.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
DIY sealant or a professional job?
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.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
External mastic in Checkendon: local notes
Historic houses like Greys Court (about 3.5 miles east) are a reminder that the area around Checkendon has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to St Peter and St Paul include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Checkendon Church of England (A) Primary School, larger buildings have long runs of movement joint that eventually need resealing.
Checkendon is about 6 miles north-west of Caversham, in Oxfordshire. Every kind of property in Checkendon can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 443 places across Oxfordshire, from the larger towns to small villages. There’s also a page for Reading, roughly 7 miles from Checkendon.
All of RG8 is covered for external mastic. Streets in the area include Uxmore Road, Whitehall Lane and Lovegrove's Lane, and we cover them all. Nearby, we also carry out external mastic in Stoke Row (1 mile east), Hook End (1 mile south), Woodcote (2 miles south-west), Heath End (2 miles north) and Ipsden (2 miles north-west). Within a short drive, we also cover Didcot (10 miles north-west), Abingdon-on-Thames (14 miles north-west), Thame (14 miles north), Henley-on-Thames (6 miles east), Benson (6 miles north-west) and Chinnor (12 miles north-east).
Landmarks near Checkendon
We work in homes and buildings around Langtree School and The Black Horse pub, among other places. The closest station to Checkendon is Goring & Streatley station, roughly 4.4 miles south-west. The countryside around Checkendon includes Hartslock.
Quotes for external mastic in Checkendon
The quote reflects the job in front of us. We look at:
- When we can work, for business premises
- How easy the joints are to reach
- How many rooms, windows or areas are involved
- Any mould that needs treating
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Whether it has been sealed before
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Also in Checkendon
What the job involves on each surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. In a small place like Checkendon, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Mention any parking rules near the property
- Mention any tricky access
- Keep pets and children clear of the area while we work
How to get a quote
For external mastic in Checkendon, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Read more
When to call us in Checkendon
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
Any of these means the joints need attention:
- Joints where the bead has come unstuck
- Old sealant gone brittle and cracked
- Plants rooting in failed movement joints
- Damp patches traced to an open external joint
Letting a property close to Goring & Streatley station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Whether they’re fully insured
- How long the guarantee is
- Which colour the sealant will be
- How the surfaces are prepared before sealing
For landlords and businesses
If you manage several properties in or around Checkendon, several properties can be quoted together. Just tell us the addresses and what each one needs.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.