Oxfordshire · England
External & façade joints in Northmoor, Oxfordshire
Movement joints in Northmoor need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Failed seals between different materials
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
What happens on the day
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Northmoor, 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.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention if the joints have been sealed before
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.
Advice
About our external mastic in Northmoor
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. Common call-outs are for sealant that has lost its bond to the brick or render and weathered mastic that no longer stretches, on render & cladding joints, brickwork movement joints and concrete & block.
Older homes in small places like Northmoor may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Northmoor (OX29)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Northmoor
We do not publish a price list. The quote depends on:
- Mould in or behind the old joints
- How many areas need sealing
- Which sealant suits the joint
- Access and height
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
What to tell us when you ask for a quote:
- Where the property is
- If someone has resealed it before
- A few photos by email, if you can
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Why deal with it now?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Where a wall is exposed, as many are in small places like Northmoor, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Northmoor
- 180+ five-star Google reviews
- We are fully insured
- Tidy, careful work
- Every job guaranteed for a year
Read what affects the cost or customer reviews.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
FAQs for Northmoor
What guarantee comes with external mastic in Northmoor?
All our work, in Northmoor and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Northmoor within the area you cover?
Yes, Northmoor is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so the joint doesn’t draw the eye.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year and renew it when it starts to fail.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
Do you work for landlords and businesses?
Yes, often. Several properties can be quoted together.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Adding movement joints to masonry that has none
- Damp that is not coming from the joint
- Failed render or damaged cladding panels
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
What we seal
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Façade panels
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joints work hard every day. The sealant is chosen with that in mind.
Northmoor buildings and the weather
With historic houses such as Appleton Manor (about 1.7 miles south-east) nearby, there’s older building stock in the area around Northmoor as well as newer homes. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of St Denys include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant. Around Northmoor, as everywhere, external mastic is only as good as the preparation behind it.
Northmoor is about 6 miles north-west of Abingdon-on-Thames, in Oxfordshire. Jobs in Northmoor get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Oxfordshire, we cover 443 places, and Northmoor is one of them. We also work in Oxford, around 7 miles away.
Work in OX29 is quoted and booked the same way as anywhere else. External mastic is available to properties on Chapel Lane and Bints Place. Nearby, we also carry out external mastic in Appleton (2 miles south-east), Sutton (2 miles north), Cumnor (3 miles east), Filchampstead (3 miles north-east) and Farmoor (3 miles north-east). Within a short drive, we also cover Oxford (7 miles east), Didcot (10 miles south-east), Abingdon-on-Thames (6 miles south-east), Witney (6 miles north-west), Carterton (9 miles west) and Wantage (9 miles south).
Local landmarks in Northmoor
Typical jobs here are in homes near The Red Lion Public House, among other places. A little further out are Abingdon Community Hospital (5.4 miles south-east) and Hinton Waldrist Castle (3.7 miles south-west). The countryside around Northmoor includes Hitchcopse Pit and Cumnor Hill.
Also near Northmoor
What else we do in Northmoor
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.