Buckinghamshire · England
North Marston External Mastic
Movement joints in North Marston need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Leaking joints around cladding and façade panels
- Plants rooting in failed movement joints
- Joints with sealant missing in places
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
External mastic in North Marston, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We take the old material out and do it properly. If you’re dealing with brick movement joints where the sealant has split and movement joints filled with mortar instead of sealant, we can help, whatever the surface.
In a village or hamlet like North Marston, 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.
A 12-month guarantee comes as standard.
- Place
- North Marston (MK18)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
North Marston: your questions answered
Can you help a landlord with a rental near Aylesbury Vale Parkway station?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Will you come out to North Marston?
Yes, North Marston is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move and needs a flexible seal, not mortar.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months, large or small.
Where do you work from?
We work from Crawley. Our applicators cover North Marston, along with the rest of our area.
Are you insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
What the job involves on each 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
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Looking after it afterwards
So the new joints stay in good condition:
- Tell anyone working on the walls about the movement joints
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Keep soil, plants and ivy away from the joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Common problems we fix in North Marston
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.
If you can see any of these, it’s time to have the joints looked at:
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Failed sealant between panels on a façade
- Gaps where render, brick and frames meet
For site and facilities teams at buildings such as North Marston Church of England School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before you book
- What insurance they hold
- When the joint can take water or movement
- How the joint is cleaned and prepared
- Who turns up on the day
What affects the quote in North Marston
Every job gets its own quote. These are the things that affect it:
- How many areas need sealing
- Whether there’s mould to deal with
- The type of sealant required
- The number and length of the joints
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we’ll explain what it covers.
What we need to know
When you call or email, these details help:
- The problem you’ve noticed
- How we’d reach the joints
- A few photos by email, if you can
- Roughly how big the job is
Asking for a quote is easy: let us know what needs doing and where. Photos by email help us understand the job, and we’ll come back to you with a quote.
What we do, step by step
At the end, we look at the finished work together. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the amount of work. For a village or hamlet like North Marston, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Advice
External mastic in North Marston: local notes
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. With historic houses such as Claydon House (about 3.8 miles north-west) nearby, there’s older building stock in the area around North Marston as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Aylesbury Vale Parkway station, outside joints that have cracked can let damp into a rental, so check them between lets. Homes close to Church of St Mary include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
North Marston is about 6 miles north-west of Aylesbury, in Buckinghamshire. From the centre of North Marston to the outskirts, we cover external mastic for every kind of property. 263 places in Buckinghamshire are on our list, from the larger towns to small villages. We also work in Oxford, around 18 miles away.
We work across the MK18 postcode area for external mastic and the streets around it. If you need external mastic at a property on High Street, Elmers Meadow and Dudley Close or a nearby road, we can help. If you are just outside North Marston, we cover Oving (1 mile south-east), Pitchcott (1 mile south), Whitchurch (2 miles south-east), Hardwick (3 miles south-east) and Weedon (4 miles south-east). Further out, we also cover Aylesbury (6 miles south-east), Buckingham (8 miles north-west), Elmhurst (6 miles south-east), Southcourt (7 miles south), Princes Risborough (12 miles south) and Haydon Hill (5 miles south).
Around North Marston
In North Marston, that means homes and buildings near The Pilgrim pub. The nearest railway station is Aylesbury Vale Parkway station, about 4.7 miles south of the centre. Other landmarks nearby include Bolbec Castle (2 miles south-east) and Royal Buckinghamshire Hospital (5.9 miles south-east).
Work for landlords, hotels and businesses
Landlords and agents in North Marston can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.