Oxfordshire · England
External Mastic in Cutteslowe
Professional external mastic in and around Cutteslowe, with every bit of old sealant taken out first.
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
External mastic in Cutteslowe, done properly
For buildings in Cutteslowe, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. Typical jobs include movement joints with cracked, split or missing sealant and weathered mastic that no longer stretches, across copings & trims, render & cladding joints and concrete & block.
Homes around Cutteslowe range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Big or small, it’s backed by our 12-month guarantee.
- Location
- Cutteslowe (OX2)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work normally takes a few hours for a handful of joints, longer for a whole elevation. Parking around Cutteslowe is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, phone 0345 464 0079 or email us.
Advice
Questions from Cutteslowe
I let a flat near Oxford Parkway station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before we start.
Will you come out to Cutteslowe?
Yes, Cutteslowe is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
When will the joints need doing again?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Every job carries our one-year guarantee.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
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.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or send us an email.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Check external joints each spring
- Tell anyone working on the walls about the movement joints
- Clear growth from the base of walls and joints
- Never let anyone fill a movement joint with mortar
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
- Failed render or damaged cladding panels
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Cutteslowe
- Joints between brick and frames
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Copings & trims
- Concrete & block
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Whether there’s mould to deal with
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Whether it has been sealed before
- The address or postcode of the job
- Access, such as stairs, a lift or height
- Roughly how big the job is
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.
What the job involves on each surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap.
Cladding and façade panels
Cladding and façade panels are normally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Places near Cutteslowe
Other services in Cutteslowe
Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. Around Cutteslowe, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
The cost depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Cutteslowe
- We never seal over old sealant
- 20+ years of sealant experience
- We leave the area clean and tidy
- Fully insured
Take a look at our cost guide or customer reviews.
Walls and rooflines in Cutteslowe
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. With historic houses such as Holywell Manor (about 2.5 miles south) nearby, there’s older building stock in the area around Cutteslowe as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near Oxford Parkway station, outside joints that have cracked can let damp into a rental, so check them between lets. For site and facilities teams at buildings such as Cutteslowe Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Roman Catholic Church of St Gregory and St Augustine include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Cutteslowe is about 3 miles north-west of Oxford, in Oxfordshire. For external mastic in and around Cutteslowe, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We are based in Crawley and cover Oxfordshire. Our area takes in 443 places across Oxfordshire, from the larger towns to small villages.
Every address in OX2 is within our area for external mastic. Whether your property is on Wren Road, Scott Road and Wyatt Road or a nearby road, our applicators can take on the job. Main roads around Cutteslowe include the A4165, which makes travel easy. We also cover the places around Cutteslowe: Sunnymead (1 mile south), Summertown (1 mile south), North Oxford (1 mile south), Wolvercote (1 mile west) and Godstow (2 miles south-west). Further out, we also cover Oxford (3 miles south-east), Didcot (12 miles south), Bicester (9 miles north-east), Abingdon-on-Thames (8 miles south), Witney (10 miles west) and Carterton (14 miles west).
Landmarks near Cutteslowe
In Cutteslowe, that means homes and buildings near Oxford University Parks, St Hugh's College Main Building Including Library and The Plough pub, among other places. You’ll also find Oxford Academy (1.1 miles south) and Summer Fields School (0.8 miles south). The nearest railway station is Oxford Parkway station, about 1 mile north of the centre. A little further out are Acland Hospital (2 miles south) and Oxford University Museum of Natural History (2.2 miles south). Not far away are Headington Hill and Hook Meadow and The Trap Grounds.