Hunston mastic sealing
Commercial sealant work in Hunston for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Draughts at frames across a block
- A mix of products and colours from past repairs
- Cracked, hardened mastic round windows on a block
Need mastic sealing in Hunston?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
When it isn’t the sealant
We check first that sealant really is the fix. It isn’t the answer for:
- Substrate edges that need repairing first
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Misted or failed double-glazed units
Not sure which it is? You can call the office on 01277 525 020 or use the quote form and we’ll tell you honestly.
Joints and surfaces we work on
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Balcony and threshold joints
- Shopfronts below residential blocks
- External wall and movement joints
- Communal kitchens and washrooms
Mastic sealing in Hunston, done properly
Our clients include managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios. A planned, building-by-building programme often works better than reacting to each complaint, with each block quoted and scheduled in turn. The enquiries we see most involve cracked, hardened mastic round windows on a block and worn sealant at communal door frames, on communal kitchens and washrooms, window and door perimeters on blocks and balcony and threshold joints. A specialist sealant contractor works differently from a general builder: in Hunston, that means joint design, primers and backing rod as standard.
Rural conversions near places like Hunston often set modern frames into older stone, flint or brick. Perimeter mastic there has to grip an uneven face and suit the building’s character.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we’re clear about what is covered before work starts.
- Where
- Hunston (PO20)
- Wider area
- West Sussex
- Guarantee
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Also near Hunston
Other services in Hunston
Signs you need mastic sealing in Hunston
The edges of the material itself sometimes break away, such as crumbling render, brick arrises or frame edges. If the edges are unsound, we say so before quoting the sealing.
Common reasons buildings call us in:
- Repeated reactive repairs to the same buildings
- Old repairs sealed over failed mastic
- Worn sealant at communal door frames
- Damp patches beside frames
Older community buildings, St Leodegar's Church among them, often have frames of mixed ages whose mastic varies.
Before you book anyone
- Whether their applicators hold CSCS cards
- Do they follow the manufacturer’s priming guidance?
- Whether old or failed sealant will be cut out, not overlaid
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Block-wide mastic in Hunston
Hunston is within about 3 miles of the coast. On buildings near the shore, the side facing the weather normally needs its mastic renewed first. Central London is about 56 miles from Hunston. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres.
If your remit includes a building such as North Mundham Primary School, frame and door mastic can be programmed for the holidays. Student accommodation around universities such as University of Chichester, 2.4 miles north of Hunston, is normally managed block by block, which suits a planned mastic programme.
Hunston is about 2 miles south of Chichester, in West Sussex. We cover commercial sites throughout Hunston, whether it’s a single job or part of a planned programme. Hunston is one of 373 places we cover in West Sussex. For work in that direction, see our Portsmouth page (13 miles or so).
We take on mastic joints across the PO20 postcode area, for business premises of every kind. We cover commercial and managed buildings on Heath Close, Westlands Road and St Leodegars Way. Nearby places we also cover include Donnington (1 mile west), North Mundham (1 mile east), Runcton (1 mile east), Portfield (2 miles north) and Chichester (2 miles north). Bigger towns within reach include Bognor Regis (4 miles east), Selsey (5 miles south), Littlehampton (11 miles east), Rustington (12 miles east), Angmering (13 miles east) and Yapton (7 miles east).
Around Hunston
Locally, jobs take us to sites close to Chichester High School For Girls and The Spotted Cow Public House and the streets around them. The closest station to Hunston is Chichester station, about 1.5 miles north. Nearby you will also find St Richard's Hospital (2.3 miles north) and Chichester Castle (2 miles north).
From enquiry to sign-off
Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. Jobs in and around smaller places like Hunston are normally planned as a single visit, so photos and measurements up front really help. That way the right products come on the day.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
What we need from you
- Send asbestos survey details if the building is pre-2000
- Make sure the joints can be reached
- Point out parking and an unloading spot
Getting a fixed quote
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or speak to us on 01277 525 020 or use the quote form if you’d rather talk the job through.
Read more
Different surfaces, different methods
Window and door perimeters on blocks
Blocks have a mix of frame materials, and the product is matched to the frame material and the masonry. We’ll confirm the colours available for the specified product.
Tenement and older buildings
Stone needs a neutral-cure product and we choose accordingly.
Aftercare for building managers
Keep the joints in good shape with a few simple steps:
- Plan resealing building by building rather than complaint by complaint
- Share the asbestos register when you send details
- Track which buildings were done and when
- Make mastic part of routine maintenance checks
If paintable sealant was used, decoration can follow once it has cured. Silicone typically can’t be painted, so keep decorators off it unless told otherwise.
One failed perimeter typically means others on the same building are close so a single failure is a sign to check the rest. Doing them together saves going back again and again.
FAQs: Hunston
Will you take on a block within reach of Chichester station?
Yes. Blocks of any size are within what we do. Photos of each elevation help us quote accurately.
Will you take on work at estates like City Business Park, close to Hunston?
Yes. We cover Hunston and the area around it, including industrial estates, business parks and retail parks such as City Business Park. Send details of the unit and the work through our quote form for a quick quote.
Is mastic sealing guaranteed?
Our workmanship carries a 12-month guarantee and we hold public liability insurance.
Is asbestos a concern with old mastic?
Some mastics in pre-2000 buildings contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.
Can you plan resealing across several buildings?
We can. Each building is inspected, quoted and scheduled in turn starting wherever is most urgent.
When can the area be used after sealing?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Why it’s worth doing now in Hunston
Draughts round window perimeters cost occupiers comfort, and they often blame the windows. In many cases, new perimeter sealant deals with it where the frames themselves are sound. Older rural buildings around Hunston move with the seasons, and rigid or tired sealant can’t keep up. A sealant with the right movement capability, correctly sized, lasts far better.
The specified product makes a difference, as does the preparation each joint needs. Access, phasing and site rules also count.
Why us?
- Constructionline member
- Commercial sealant work since 2005
- Our applicators hold CSCS cards
- CHAS accredited contractor
Take a look at our cost guide and our accreditations.