East Sussex · England
Cock Marling External Mastic
External mastic for Cock Marling and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Old sealant gone brittle and cracked
- Failed seals between different materials
- Weeds or debris growing in open joints
External mastic for homes and businesses in Cock Marling
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. If you’re dealing with damp patches traced to an open external joint and failed seals between different materials, we can put it right.
Older homes in small places like Cock Marling 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.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Cock Marling (TN31)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Cock Marling buildings and the weather
Cock Marling is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Lamb House (about 2.5 miles east) nearby, there’s older building stock in the area around Cock Marling as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Lamb House, about 2.5 miles east, is one of the historic houses in the wider area around Cock Marling, and older homes nearby need a sealant that suits their walls.
Cock Marling is about 7 miles north-east of Hastings, in East Sussex. We provide external mastic to householders, landlords and businesses in Cock Marling and nearby. Cock Marling is one of 289 towns and villages in East Sussex where we work. Our Brighton page covers work nearby.
Every address in TN31 is within our area for external mastic, from the main roads to the quietest streets. Close by, we work in Udimore (1 mile west), Icklesham (2 miles south), Broad Street (2 miles south-west), Broadland Row (2 miles west) and Peasmarsh (2 miles north). Within a short drive, we also cover Hastings (7 miles south-west), Bexhill-on-Sea (11 miles south-west), St Leonards (8 miles south-west), Hastings Old Town (7 miles south-west), Belmont (7 miles south-west) and Hollington (7 miles south-west).
What’s near Cock Marling
The closest station to Cock Marling is Winchelsea station, roughly 1.1 miles east. Other landmarks nearby include Camber Castle (2.4 miles east) and Winchelsea Court Hall Museum (1.6 miles south-east). Green spaces nearby include Flatropers Wood.
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- Mould in or behind the old joints
- The type of sealant required
- Working hours on commercial sites
- Whether the work is at height
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Asking for a quote
To make quoting easier, let us know:
- The type of property
- Photos by email, if that’s easy
- The rough size of the job
- Any access issues, like height or stairs
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
How it works
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to several days, depending on the building for a typical job. In a small place like Cock Marling, access is usually the main thing to plan. 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.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Mention any sign-in or site rules at work premises
- Plan for the work area to be out of bounds to pets and children
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Advice
Leave it or put it right?
Sealing over the top of old mastic doesn’t hold for long. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. In a small place like Cock Marling, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why book with us
- Sealant colour chosen to suit
- Over 20 years’ experience
- Neat joints and a tidy finish
- White, clear, grey or another colour, product permitting
Read our cost guide and what customers say.
What we can’t put right
Before you book, it’s worth knowing the limits:
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
What we seal
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Copings & trims
Nearby places to Cock Marling
Also in Cock Marling
Cock Marling: your questions answered
Do you work for landlords with property near Winchelsea station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Will you come out to Cock Marling?
Yes. Cock Marling 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.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Can you seal joints between render and window frames?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. The sealant is matched to both sides.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
Is it OK to fill a movement joint with cement?
No. Rigid materials can’t move with the wall and the joint fails. If it has already been filled, we can generally cut it out and reseal it.
What we’re called out for in Cock Marling
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Keep an eye out for these signs:
- Joints where the bead has come unstuck
- Damp patches traced to an open external joint
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
Rented homes near Winchelsea station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before booking
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
- Whether you can choose the colour
- When the joint can take water or movement
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
For anyone letting property in or around Cock Marling, jobs at different addresses can be quoted together. Send us the addresses and the work at each.