Oxfordshire · England
External & façade joints in New Marston, Oxfordshire
Problem with your movement joints in New Marston? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Panel joints letting water in
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
What we cannot put right
We won’t take on work that will not last, so here’s what sealant can’t put right:
- Rising or penetrating damp from elsewhere in the wall
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracking across the wall rather than at a joint
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in New Marston
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Façade panels
About our external mastic in New Marston
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. Common call-outs are for failed sealant between panels on a façade and plants rooting in failed movement joints, on copings & trims, render & cladding joints and joints between brick and frames.
Houses in smaller places like New Marston can stand more in the open than those in a built-up town, and walls and rooflines facing the weather take the worst of it. Joints on those sides are normally the first to go.
A one-year guarantee comes as standard, so you are covered after we’ve gone.
- Location
- New Marston (OX3, OX1, OX4)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
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.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
What happens on the day
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. The job usually takes a few hours for a handful of joints, longer for a whole elevation, and we explain the cure time before we leave. A visit to New Marston is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Advice
New Marston questions
Do you cover smaller places like New Marston?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Oxford station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
How much does external mastic cost in New Marston?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Is it messy?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
Can you match the colour of my brickwork?
The aim is a neat, even joint in a colour that suits the wall. We will talk through colour options before any work starts from the range available.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including preparation and clearing up. Your quote will say how long we expect yours to take.
What affects the quote in New Marston
We do not publish a price list, because no two jobs are the same. The quote depends on:
- The number of rooms or windows
- The size of the job
- Any working-time requirements on site
- The old material and how stubborn it is
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the property is
- The rough size of the job
- Photos by email, if that’s easy
- What the problem is, such as mould, gaps, leaks or cracking
For external mastic in New Marston, ring 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.
Walls and rooflines in New Marston
With historic houses such as Holywell Manor (about 0.7 miles south-west) nearby, there’s older building stock in the area around New Marston as well as newer homes. Where a home is older, 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Oxford station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Saint Michael and All Angels, the joints between older walls, newer extensions and the roofline need a sealant that can move.
New Marston is about 1 mile north of Oxford, in Oxfordshire. If you need external mastic in New Marston, please ring 0345 464 0079 or email us for a quick quote. We cover Oxfordshire from our Crawley base, New Marston included. Our area takes in 443 places across Oxfordshire.
Every address in OX3, OX1 and OX4 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Ferry Road, Croft Road and Copse Lane or a nearby road, our applicators can take on the job. We also cover the places around New Marston: Headington Hill (1 mile south-east), Northway (1 mile north-east), Oxford (1 mile south), St Clement's (1 mile south) and Norham Manor (1 mile west). We also work in nearby towns such as Didcot (11 miles south), Bicester (10 miles north), Abingdon-on-Thames (6 miles south), Witney (11 miles west), Carterton (15 miles west) and Thame (11 miles east).
Landmarks near New Marston
Locally, jobs take us to homes and businesses close to English Faculty Library, Cheney School and Headington Hill Park. Nearby too are Rye St Antony School (0.5 miles south-east) and White Horse pub (0.8 miles south-east). For rail, the closest station is Oxford station, roughly 1.6 miles south-west of the centre. Other landmarks nearby include Clarendon Shopping Centre (1.2 miles south-west) and Churchill Hospital (0.7 miles east). For a walk, there’s Headington Hill and CS Lewis Nature Reserve.
Aftercare tips
Aftercare is simple:
- Do not let climbing plants root in the sealant
- Keep movement joints as flexible joints, not mortar
- Keep high-pressure jets off the joints
- Walk round the building once a year and look at the joints
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.
Landlord and commercial work in New Marston
Landlords and letting agents in New Marston can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
What we’re called out for in New Marston
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
It’s worth asking for a quote if you see:
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
- Failed seals between different materials
- Joints with sealant missing in places
If you look after a building such as St Michael's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What to look for in a quote
- Whether all the old sealant comes out first
- How much experience the applicator has
- Whether VAT is included
- Which colour the sealant will be