East Sussex · England
External Mastic in Chailey
External mastic in Chailey from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Damp patches traced to an open external joint
- Hard, crazed mastic that has stopped moving
- Joints where the bead has come unstuck
Signs you need external mastic in Chailey
Using the wrong sealant is another common reason. A high-modulus or general-purpose sealant can be too rigid for a busy joint, and it tears off the sides.
The most common problems we see are:
- Leaking joints around cladding and façade panels
- Movement joints filled with mortar instead of sealant
- Old sealant gone brittle and cracked
- Movement joints with cracked, split or missing sealant
Rented homes near Plumpton station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Before booking anyone
- How hidden problems are handled
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- What guarantee comes with the work
External mastic in Chailey
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We’re often asked to deal with gaps where render, brick and frames meet and sealant pulling away from one side of the joint, across brickwork movement joints, render & cladding joints and copings & trims.
Around Chailey, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Chailey (BN8)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes 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.
Keeping the joints in good condition
Looking after new joints is easy:
- Point out the joints to other trades
- Deal with leaking gutters that soak the joints below
- Keep movement joints as flexible joints, not mortar
- Check external joints each spring
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Landlord and commercial work in Chailey
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
What we do, step by step
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours to a few days, depending on the length of joint and the access. In a small place like Chailey, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
How to get a quote
Want a quote for external mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Nearby places to Chailey
What else we do in Chailey
Outside joints around Chailey
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.
For an older house near a landmark such as The Parish Church of St Peter, older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Chailey St Peter's Church of England Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Chailey is about 5 miles south-east of Haywards Heath, in East Sussex. We provide external mastic to homes and businesses in Chailey and nearby, as part of our work across East Sussex. Our area takes in 289 places across East Sussex, from the larger towns to small villages. Our Brighton page covers work nearby.
Our applicators cover all of BN8 for external mastic and the streets around it. Other places close to Chailey include North Chailey (1 mile north), South Street (1 mile south-west), Newick (1 mile north-east), Founthill (1 mile east) and South Chailey (2 miles south-west). Larger places within reach include Seaford (14 miles south), Lewes (6 miles south), Hailsham (13 miles south-east), Crowborough (10 miles north-east), Uckfield (5 miles east) and Newhaven (12 miles south).
Local landmarks in Chailey
We work in homes and buildings around Chailey School, The Five Bells Inn and Chailey Heritage School, among other places. The nearest railway station is Plumpton station, roughly 3.1 miles south-west of the centre. Well-known places in the area include Princess Royal Hospital (4.1 miles north-west). The countryside around Chailey includes Blackcap and Bedelands Farm Nature Reserve.
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Render that is blown, hollow or coming away
- Cracks in the bricks or render themselves, away from the joints
- Movement that’s more than a sealant joint can take
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in Chailey
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Concrete & block
Your questions about external mastic in Chailey
Is Chailey within the area you cover?
Yes, Chailey is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Chailey in your area for external mastic?
Yes. Our work covers London and the South East, and Chailey is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
How long does the job take?
That depends on how much there is to do, but most jobs take anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
What is a movement joint?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking and needs a flexible seal, not mortar.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
When is the sealant fully cured?
Cure times vary by product and the temperature. Before we leave, we will tell you the cure time.
Can you seal joints between render and window frames?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
What happens if it’s left?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around Chailey can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Chailey clients choose us
- Colour picked to suit the job
- Colour agreed with you before any work starts
- Domestic, commercial and hotel work
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost or our reviews.