West Sussex · England
External & façade joints in Charlton, West Sussex
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Charlton and across West Sussex. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Rigid filler in a joint that should flex
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
How we handle external mastic in Charlton
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. Common call-outs are for gaps where render, brick and frames meet and damp patches traced to an open external joint, on render & cladding joints, joints between brick and frames and façade panels.
Older homes in small places like Charlton may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Charlton (PO18)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- How many areas need sealing
- Any working-time requirements on site
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Helping us quote
To help us quote quickly, please include:
- The rough size of the job
- Whether it’s a home or a business
- How we’d reach the joints
- A few photos by email, if you can
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear quote before any work starts.
Common problems we fix in Charlton
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Plants rooting in failed movement joints
- Rigid filler in a joint that should flex
- Hard, crazed mastic that has stopped moving
If you live in an older home near The Parish Church of the Blessed Virgin Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- Is VAT in the price?
- How hidden problems are handled
- What the cure time is
- Which sealant they’ll use, and why
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Charlton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Tell us about any water getting in
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
How to get a quote
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we’ll come back to you with a quote.
Read more
What external mastic looks like in Charlton
Historic houses like West Dean House (about 1.7 miles west) are a reminder that the area around Charlton has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Singleton CofE Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Charlton is about 5 miles north of Chichester, in West Sussex. Homes, rented property, offices and hotels in Charlton can book us for external mastic. The work is guaranteed for a year. We cover 371 towns and villages across West Sussex. We also work in Portsmouth, about 16 miles from Charlton.
Here we cover the PO18 postcode area for external mastic. We cover properties on Charlton Road and Knight's Hill. Neighbouring places we cover for external mastic include Singleton (1 mile west), East Dean (1 mile east), West Dean (2 miles west), Cocking (3 miles north) and Heyshott (3 miles north). We also work in nearby towns such as Bognor Regis (9 miles south), Chichester (5 miles south), Selsey (12 miles south), Littlehampton (11 miles south-east), Emsworth (10 miles south-west) and Rustington (12 miles south-east).
Around Charlton
A little further out are Chichester Centre (4.6 miles south) and Weald and Downland Gridshell (0.8 miles west). Green spaces nearby include Levin Down and Kingley Vale National Nature Reserve.
Towns and villages near Charlton
Also in Charlton
Questions from Charlton
Will you come out to Charlton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is external mastic in Charlton guaranteed?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together and it means sorting access once. Where a wall is exposed, as many are in small places like Charlton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why book with us
- Old sealant always removed completely
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
Take a look at our cost guide and what customers say.
Landlord and commercial work in Charlton
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so here’s what sealant cannot put right:
- Walls that need new movement joints cut into them
- Rising or penetrating damp from elsewhere in the wall
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.