Brighton and Hove · England
Falmer External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Falmer and across Brighton and Hove. Fully insured, ARBOMaster approved and guaranteed for a year.
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
External mastic in Falmer
For buildings in Falmer, 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. If you are dealing with plants rooting in failed movement joints and failed sealant between panels on a façade, we can put it right, whatever the surface.
In a village or hamlet like Falmer, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Whatever the size of the job, you get the same 12-month guarantee in Falmer and across Brighton and Hove.
- Place
- Falmer (BN1)
- Region
- Brighton and Hove
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Loose or hollow render, which needs re-rendering
- Walls that need new movement joints cut into them
- Cracking across the wall rather than at a joint
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The old material and how stubborn it is
- When we can work, for business premises
- The type of sealant required
- Mould in or behind the old joints
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Roughly how big the job is
- What’s wrong with the joints now
- Where the job is, and your postcode
- If someone has resealed it before
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Act on the first splits you see
- Look over the joints every year, ideally after winter
- Fix overflowing gutters above sealed joints
- Do not let climbing plants root in the sealant
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Your questions about external mastic in Falmer
Is Falmer in your area for external mastic?
Yes. Our work covers London and the South East, and Falmer is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Is Falmer within the area you cover?
Yes. Falmer is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
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 12-month guarantee.
How long will you be here?
Typically it takes a few hours for a handful of joints, longer for a whole elevation. Larger jobs naturally take longer, and we’ll say how long yours will take.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render. There’s a wide choice of exterior colours.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you need external mastic in Falmer?
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Signs it’s time to call us include:
- Joints with sealant missing in places
- Joints pointed up with cement by mistake
- Weeds or debris growing in open joints
- Sealant that has lost its bond to the brick or render
If you look after a building such as Brighton Aldridge Community Academy, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How the surfaces are prepared before sealing
- How hidden problems are handled
- Who does the work, and how experienced they are
- How the colour is chosen
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Falmer can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Falmer
- Full insurance on every job
- Domestic, commercial and hotel work
- You choose the colour before work begins
- A 12-month guarantee on all work
What we do, step by step
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building and we leave things clean and tidy. Somewhere like Falmer needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any tricky access
- Tell us about any water getting in
Get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
Read more
Outside joints around Falmer
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. Historic houses like Preston Manor & Gardens (about 3.5 miles south-west) are a reminder that the area around Falmer has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Falmer station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as The Parish Church of St Lawrence, an extension built onto an older house moves differently, and the joint between them takes the strain.
Falmer is about 3 miles north-east of Brighton, in Brighton and Hove. Whether you’re in the middle of Falmer or further out, we cover external mastic for every kind of property. Our Brighton and Hove coverage runs to 30 places, Falmer among them.
Our applicators cover all of the BN1 postcode area for external mastic and the streets around it. Whether your property is on Middle Street, Park Street and Mill Street or anywhere close by, we can help. We also cover Kingston near Lewes (2 miles east), Iford (3 miles east), Ovingdean (3 miles south), Rottingdean (3 miles south) and Roedean (3 miles south). Further out, we also cover Brighton (3 miles south-west), Brighton and Hove (5 miles west), Hove (5 miles south-west), Carlton Hill (4 miles south-west), Hanover (3 miles south-west) and West Hill (4 miles south-west).
Around Falmer
In Falmer, that means homes and buildings near The Swan Inn, University of Sussex Library and Stanmer Park and the streets around them. There’s a railway station in Falmer itself: Falmer station. Well-known places in the area include Brighton And Hove Albion Football Club Museum (less than half a mile south-west) and Lewes Castle (3.8 miles east). Open spaces near Falmer include Bevendean Down and Newmarket Hill.
Also in Falmer
Surface by surface
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. We prime where the sealant needs it before sealing.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.