Milton Keynes · England
External & façade joints in Great Brickhill, Milton Keynes
Our applicators work in Great Brickhill on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Plants rooting in failed movement joints
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
About our external mastic in Great Brickhill
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We take the old material out and do it properly. Common call-outs are for sealant pulling away from one side of the joint and failed seals between different materials, on joints between brick and frames, brickwork movement joints and render & cladding joints.
Around Great Brickhill, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- Great Brickhill (MK17)
- Region
- Milton Keynes
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Great Brickhill: your questions answered
I let a flat near Bow Brickhill station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Do you cover smaller places like Great Brickhill?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
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 it should be sealed with a flexible sealant.
How long does external mastic take?
It depends on the size of the job, but most jobs take a few hours to a few days, depending on the length of joint and the access. We will tell you when we quote.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you work at height?
It depends on the building. Where joints can be reached safely, we will do them. Tell us about the building and we’ll confirm what access is needed.
How the job changes by surface
Concrete and blockwork
The face of concrete or block is often dusty, so preparation is key. We prime where the sealant needs it.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Places near Great Brickhill
Also in Great Brickhill
What affects the cost of external mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- How easy the joints are to reach
- When we can work, for business premises
- The size of the job
- How much old sealant there is and how hard it is to remove
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear price before any work starts.
What to tell us for a quote
When you call or email, these details help:
- Pictures of the joints, sent by email
- What’s wrong with the joints now
- Whether it’s a home or a business
- Any previous sealing or DIY work
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Great Brickhill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
Getting a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Related advice
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Keep water from gutters off the wall
- Have failed joints looked at early
- Avoid pressure-washing directly into sealant joints
- Check the sealant is paintable before painting near it
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick.
DIY versus a professional finish
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
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. All the old material has to come out first.
Common problems we fix in Great Brickhill
Sometimes a movement joint was filled with mortar or a rigid filler. The joint can’t move, so the wall cracks somewhere else instead.
Most people get in touch after spotting something like this:
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
Schools such as High Ash Church of England Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- How long to leave it before use
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Which colour the sealant will be
External mastic in Great Brickhill: local notes
With historic houses such as Bletchley Park (about 3.4 miles north-west) nearby, there’s older building stock in the area around Great Brickhill 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. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Bow Brickhill station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around St Mary the Virgin, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Great Brickhill is about 3 miles south-east of Bletchley, in Milton Keynes. We carry out external mastic for homeowners, landlords and businesses in Great Brickhill and the surrounding area, as part of our work across Milton Keynes. Across Milton Keynes, we cover 73 places, Great Brickhill among them. Our Oxford page covers work nearby.
Work in MK17 works the same way as everywhere else we cover. We cover properties on Cuff Lane, Heath Road and Holts Green. We also cover Little Brickhill (1 mile north) and Woburn (3 miles north-east). Further out, we also cover Milton Keynes (6 miles north-west), Bletchley (3 miles north-west), Newport Pagnell (9 miles north), Bletchley and Fenny Stratford (3 miles north-west), Furzton (4 miles north-west) and Whitehouse (7 miles north-west).
Landmarks near Great Brickhill
We work in homes and buildings around Sir Herbert Leon Academy, Old Red Lion pub and Stockgrove Country Park. Great Brickhill’s nearest station is Bow Brickhill station, roughly 2.9 miles north. A little further out are Bletchley Community Hospital (3.6 miles north-west) and Hangmans Hill (3.9 miles west). The countryside around Great Brickhill includes Blue Lagoon and Kings and Bakers Woods and Heaths.
Why it’s worth doing now in Great Brickhill
Sealing over the top of old mastic doesn’t hold for long. New sealant does not bond well to old, weathered sealant, so we always take the old sealant out. Around Great Brickhill, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why book with us
- 4.9 on Google from 180+ five-star reviews
- Sealant colour chosen to suit
- 12-month guarantee on every job
- An ARBOMaster approved applicator