Oxfordshire · England
Highmoor Cross External Mastic
We cover Highmoor Cross for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Panel joints letting water in
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
External mastic for homes and businesses in Highmoor Cross
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. We’re often asked to deal with cracked joints where brick meets render or frames and movement joints with cracked, split or missing sealant, across concrete & block, copings & trims and façade panels.
In a village or hamlet like Highmoor Cross, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Highmoor Cross (RG9)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that 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 Highmoor Cross, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Let us know about parking restrictions
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear price.
Advice
What affects the quote in Highmoor Cross
You will get a clear quote before any work starts. It takes into account:
- How easy the joints are to reach
- Whether there’s mould to deal with
- The size of the job
- The type of sealant required
What you pay reflects the work, not guesswork. That is why we ask about the job first.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- Roughly how big the job is
- A few photos by email, if you can
- How we’d reach the joints
We don’t publish a price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Walls and rooflines in Highmoor Cross
Historic houses like Greys Court (about 1.6 miles east) are a reminder that the area around Highmoor Cross has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Paul, an extension built onto an older house moves differently, and the joint between them takes the strain.
Highmoor Cross is about 5 miles north of Caversham, in Oxfordshire. We provide external mastic to homeowners, landlords and businesses in Highmoor Cross and the surrounding area. Highmoor Cross is one of 443 towns and villages in Oxfordshire we cover. We also work in Reading, about 7 miles from Highmoor Cross.
Postcode districts we cover here for external mastic: RG9. We cover properties on Holly Close and The Glebe. Neighbouring places we cover for external mastic include Highmoor (1 mile north-west), Shepherd's Green (1 mile south-east), Kingwood Common (1 mile south), Catslip (1 mile north) and Nettlebed (2 miles north). Within a short drive, we also cover Didcot (12 miles west), Abingdon-on-Thames (15 miles north-west), Thame (13 miles north), Henley-on-Thames (4 miles east), Benson (7 miles north-west) and Chinnor (11 miles north).
Near you in Highmoor Cross
We work in homes and buildings around The Dog and Duck pub, among other places. For rail, the closest station is Henley-On-Thames station, about 4.1 miles east of the centre. Open spaces near Highmoor Cross include Warburg Nature Reserve.
Questions from Highmoor Cross
Can you help a landlord with a rental near Henley-On-Thames station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Is Highmoor Cross in your area for external mastic?
Yes. Our work covers London and the South East, and Highmoor Cross is part of that. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear quote.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render. There’s a wide choice of exterior colours.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
How do you reach high-level joints?
It depends on the building. Tell us the height, the number of joints and what’s below them, and we will confirm what access is needed.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
Surface by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Also near Highmoor Cross
More services for Highmoor Cross
When to call us in Highmoor Cross
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and rips as the joint opens.
The most common problems we see are:
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Joints where the bead has come unstuck
- Weathered mastic that no longer stretches
Letting a property close to Henley-On-Thames station? Then split movement joints are easy to miss on a rental until damp shows inside.
Comparing quotes
- Which colour the sealant will be
- What insurance they hold
- When the joint can take water or movement
- What the quote includes, VAT included or not
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Around Highmoor Cross, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What you get with us
- Experience in homes, commercial sites and hotels
- Sealant colour chosen to suit
- You choose the colour before work begins
- Old sealant always removed completely
See what affects the cost and our reviews.
For landlords and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
For anyone letting property in or around Highmoor Cross, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Honest limits
New sealant cannot fix everything, and we’ll tell you before work begins. Sealant won’t put right:
- Movement that’s more than a sealant joint can take
- Failed render or damaged cladding panels
- Damp that isn’t coming from the joint
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Façade panels