Mastic sealing for building owners and managing agents in Charlton, West Sussex
Sealant work in Charlton for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Estate-wide sealant that is simply worn out
- Draughts at frames across a block
- Water getting in round frames after rain
Need mastic sealing in Charlton?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our mastic sealing in Charlton
Mastic Doctor has sealed joints on commercial and residential blocks since 2005. Every applicator holds a CSCS card and we hold public liability insurance. Each building we complete carries a 12-month guarantee on our workmanship. We work on communal entrances and stairwells, external wall and movement joints and shopfronts below residential blocks, and the usual reasons a site gets in touch are failed external movement joints and mastic failing across several blocks on an estate. A specialist sealant contractor works differently from a general builder: in Charlton, that means joint design, primers and backing rod as standard.
In and around smaller places like Charlton, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Mastic around frames and on external joints wears out in time, whatever the building.
We sign every job off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Where
- Charlton (PO18)
- Region
- West Sussex
- Guarantee
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
For managing agents and facilities managers
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
Do you need mastic sealing in Charlton?
In communal areas, joints take knocks from bins, bikes, buggies and deliveries, with joints near the floor and around doors suffering most. Regular cleaning wears them further.
Typical triggers for a call:
- Estate-wide sealant that is simply worn out
- Movement joints with sealant missing
- Damp patches beside frames
- Complaints coming in block by block
Older buildings near Charlton, from historic houses such as West Dean House (to the west of Charlton) to more modest stock, need compatible products when frames are resealed.
Questions to ask before you book
- Can the work be phased to keep areas open?
- How the joint faces will be prepared and primed
- Are they CHAS accredited or on Constructionline?
- Will RAMS and insurance details be available?
Also near Charlton
What else we do in Charlton
Mastic sealing around Charlton: what changes locally
Central London is about 49 miles from Charlton. Managed blocks of flats are a big part of commuter-belt property. Charlton is in the South East, one of the UK’s drier regions. External mastic still waits for dry faces and the right temperature, while the elevations that take the most sun tend to show hardened mastic first.
If you are responsible for a building such as The Parish Church of the Blessed Virgin Mary, frame and door mastic needs the same attention as any other property. Student accommodation around universities such as University of Chichester (4.7 miles south of Charlton) is normally managed block by block, which suits a planned mastic programme.
Charlton is about 5 miles north of Chichester, in West Sussex. Charlton sits inside our coverage and the rest of West Sussex, with the same fixed quotes and 12-month guarantee as everywhere else. Charlton is one of 373 places we cover in West Sussex for mastic joints. Our Portsmouth page has more on work in that area.
Postcode districts covered here: PO18. If your site is on Charlton Road and Knight's Hill or close by, we can quote for mastic joints. Close to Charlton, our area also takes in Singleton (1 mile west), East Dean (1 mile east), West Dean (2 miles west), Cocking (3 miles north) and Heyshott (3 miles north). A short drive away, we cover Bognor Regis (9 miles south), Chichester (5 miles south), Selsey (12 miles south), Littlehampton (11 miles south-east), Rustington (12 miles south-east) and Storrington (13 miles east).
Around Charlton
Nearby you will also find Chichester Centre (4.6 miles south) and Weald and Downland Gridshell (0.8 miles west). Not far away are Levin Down and Kingley Vale National Nature Reserve.
Why deal with it now?
Adding sealant to cyclical maintenance is an easy win. Waiting until leaks appear means working under pressure with less control over timing. Halls, stores and units around places like Charlton may not be checked every day, which gives a failed joint time to do damage. Resealing early avoids that.
We don’t publish prices, since every building and every scope is different. For a fixed figure, call for a quote and we’ll price your job on its own details.
What you get with us
- One number for every site we cover
- Over 20 years of commercial sealing
- Colour agreed before work starts
- Work to your specification and the manufacturer’s guidance
Take a look at how commercial sealant jobs are priced or our accreditations and insurance.
When to bring in a specialist
Certain joints really need a specialist: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
After the work
Your facilities or cleaning team can help the joints last. Share these points with them:
- Track which buildings were done and when
- Reduce knocks to communal area joints
- Mention RAMS, insurance or CSCS requirements up front
- Check sealant joints during planned building inspections
Encourage occupiers to report water or draughts at frames. Early reports catch failures before damage spreads.
Budgets are easier to plan when sealant is part of planned maintenance. A programme can start with the worst buildings so spending is spread.
Questions about Charlton
Is a smaller place like Charlton outside your area?
Not at all. Charlton is within our area. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.
Will you price a mastic programme across our Charlton portfolio?
Yes, we quote for single buildings and for programmes across several blocks. We can phase the programme to suit your budgets and notice periods.
How long will the new sealant last?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.
Who decides which product is used?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Can weather delay the job?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
Can you send RAMS and CSCS details before starting?
Our credentials include CHAS, Constructionline and public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.
Do you check for asbestos in old sealant?
We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.
Our process
Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then handed back before the next one starts. Rural sites near Charlton may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- Joint faces are cleaned, backed and resealed.
- Buildings are completed in turn.
Preparing the site
- Tell us what induction or permit system the site runs
- Point out parking and an unloading spot
- Tell staff and tenants when we will be in
Ask for a quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, call the office on 01277 525 020 or use the quote form.