Brighton and Hove · England
Carlton Hill External Mastic
Specialist external mastic for Carlton Hill: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
- Brick movement joints where the sealant has split
External mastic in Carlton Hill
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. Common call-outs are for movement joints with cracked, split or missing sealant and rain getting behind render or cladding at a joint, across render & cladding joints, joints between brick and frames and brickwork movement joints.
Around Carlton Hill, garages, outbuildings and extensions all add to the joints on the outside of a home. Leaks usually start at a gutter end, a garage door frame or where an extension meets the house.
All of our work is guaranteed for twelve months.
- Place
- Carlton Hill (BN2, BN1, BN50)
- Wider area
- Brighton and Hove
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Looking after new joints is easy:
- Never let anyone fill a movement joint with mortar
- Point out the joints to other trades
- Clear growth from the base of walls and joints
- Ask before painting over external sealant
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Once a joint cannot move, the wall finds another way, generally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
What happens on the day
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a handful of joints, longer for a whole elevation. For a job in Carlton Hill, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs 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
- Let us know if you’ve seen damp or leaks
- Mention if the joints have been sealed before
- Clear the area around the work
How to get a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.
Related advice
Your questions about external mastic in Carlton Hill
Is Carlton Hill within the area you cover?
Yes. Carlton Hill is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does living near the coast affect external mastic in Carlton Hill?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you seal joints where cladding meets other materials?
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.
How long before the joint can be used?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We will tell you when we quote.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, ring 0345 464 0079 or send us an email and let us know what needs doing and where.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Landlords, agents and businesses in Carlton Hill
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
More services for Carlton Hill
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Which sealant suits the joint
- How easy the joints are to reach
- How many areas need sealing
- When we can work, for business premises
Every job is a little different, 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.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Where the property is
- Photos by email, if that’s easy
- The type of property
- Any previous sealing or DIY work
If you are in Carlton Hill and need external mastic, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Surface by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Common problems we fix in Carlton Hill
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
If you can see any of these, it’s time to have the joints looked at:
- Sealant that has lost its bond to the brick or render
- Rain getting behind render or cladding at a joint
- Moss and dirt in joints with no sealant left
- Leaking joints around cladding and façade panels
Schools such as Carlton Hill Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- Are they insured?
- The length of the guarantee
- When the joint can take water or movement
- What happens if the job turns out different
Walls and rooflines in Carlton Hill
Carlton Hill is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Royal Pavilion (about 0.3 miles west) nearby, there’s older building stock in the area around Carlton Hill 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 Brighton station, split movement joints are easy to miss on a rental until damp shows inside. Homes close to Greek Orthodox Church of the Holy Trinity include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Carlton Hill is about 1 mile south of Brighton, in Brighton and Hove. Homes, rented property, offices and hotels in Carlton Hill can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across Brighton and Hove, we cover 30 places, Carlton Hill among them.
Work in BN2, BN1 and BN50 works the same way as everywhere else we cover. You’ll find streets such as New Road, North Road and Brills Lane, and we cover them all. With the A259 close by, Carlton Hill is easy for our applicators to reach. If you are just outside Carlton Hill, we cover Hanover (1 mile north), Brighton (1 mile north), West Hill (1 mile north-west), Kemptown (1 mile south-east) and Seven Dials (1 mile north-west). Within a short drive, we also cover Brighton and Hove (3 miles west), Aldrington (3 miles west), Hangleton (3 miles north-west), Patcham (3 miles north), Westdene (3 miles north-west) and Saltdean (4 miles east). Carlton Hill is one of the larger places we cover in Brighton and Hove.
Landmarks near Carlton Hill
Typical jobs here are in homes near Devonshire Arms, Queen's Park and Academy of Creative Training, among other places. Carlton Hill’s nearest station is Brighton station, roughly 0.5 miles north-west of the centre. Well-known places in the area include Sussex Eye Hospital (0.7 miles south-east) and Churchill Square (0.6 miles west). The countryside around Carlton Hill includes Whitehawk Hill and Newmarket Hill.
Why act early in Carlton Hill
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. In an older home around Carlton Hill, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and send you a clear quote before any work starts.
Why us?
- We are fully insured
- Arbo and Everbuild products
- A choice of colours where the product allows
- A 12-month guarantee on all work
Read our cost guide and what customers say.