Mastic Sealing in Merston
Mastic sealing for building owners, managing agents and housing associations across Merston, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Movement joints with sealant missing
- Damp patches beside frames
- Worn sealant at communal door frames
Need mastic sealing in Merston?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing in Merston
Most buildings come with mastic joints nobody has looked at since handover, and it ages quietly: window perimeters, door frames, external joints and communal junctions all rely on it. When it hardens, splits or pulls away, water and draughts follow, and occupiers start reporting it. If you have damaged joints in communal entrances and corridors and complaints coming in block by block, we can put it right, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, in Merston it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
For buildings around smaller places like Merston, we group work so one trip covers it. Send photos of the frames and joints and we’ll give a fixed quote.
We stand by our work: 12 months, guaranteed. That covers our preparation and application, and we come back if anything isn’t right.
- Where
- Merston (PO20)
- Region
- West Sussex
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Your questions answered
Will you take on a block within reach of Chichester station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
Is Merston too far out for you?
No. Places such as Merston are covered as much as the big towns. We cover Greater London and the counties of the South East. Good photos up front let us bring everything on the first visit.
How long before the joints can be used?
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 does a typical visit take?
It depends on the scope, though a typical visit usually takes one or more days per building, depending on the joint lengths and the access. For bigger or phased jobs, we’ll set out a timescale with the quote.
Can you seal joints high up on a block?
Every block is different. How upper joints are reached is agreed before work is booked so the fixed quote reflects it.
What paperwork can you provide?
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.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.
Aftercare for building managers
A few simple habits keep the new joints working:
- Avoid piecemeal callouts where you can
- Encourage occupiers to report problems at frames
- List the paperwork your organisation requires when you send details
- Start inspections with the most exposed faces
Our workmanship is covered for 12 months, so report any failure in that time. After that, regular inspection keeps the programme on track.
Failed mastic often goes unnoticed until heavy rain finds it. Acting at the first signs keeps it a straightforward reseal and the complaints that come with it.
For managing agents and facilities managers
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Merston can sit alongside others in a wider programme across West Sussex.
Block-wide mastic in Merston
Central London is about 54 miles from Merston. Commuter-belt towns tend to have plenty of managed blocks near stations and town centres, and window and balcony mastic on them tends to age at the same rate. Rainfall across the South East, Merston included, is lower than in many parts of the UK. Even so, frame mastic only goes on in dry, workable conditions, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
Churches, halls and community buildings such as Church of St Giles are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. Owners of student blocks near University of Chichester, 0.6 miles east of Merston, can schedule frame and external mastic for the summer vacation. Schools and community buildings such as North Mundham Primary School need frame and external mastic kept sound like any building.
Merston is about 3 miles south-east of Chichester, in West Sussex. Looking for mastic sealing in Merston? We can help. Across West Sussex, 373 places are covered, Merston among them. Our Portsmouth page has more on work in that area, about 15 miles away.
Postcode districts covered here: PO20 for mastic joints. Close to Merston, our area also takes in Runcton (1 mile south-west), Colworth (1 mile east), Oving (1 mile north), North Mundham (1 mile west) and Lagness (1 mile south). Bigger towns within reach include Worthing (15 miles east), Bognor Regis (3 miles south-east), Chichester (3 miles north-west), Selsey (6 miles south), Littlehampton (9 miles east) and Rustington (10 miles east).
Near you in Merston
Recent enquiries here include premises near Chichester High School For Girls. Merston’s nearest station is Chichester station, roughly 2.3 miles west of the centre. A little further out are The Chichester City Museum (2.3 miles north-west) and St Richard's Hospital (2.3 miles north-west).
How a job runs
Tell us your site hours and access windows and we will plan around them. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. For work around Merston, we aim to finish in one visit, so photographs and measurements up front really help. Then the right materials arrive with us.
- A building-by-building inspection lists the failed joints.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
Before we start on site
- Send any specification or drawings in advance
- Agree which areas must stay open
- Tell staff and tenants when we will be in
Get a fixed quote
For a fixed quote, ring 01277 525 020 or email a schedule or drawings with the site address and an outline of the work. Our quote form is another easy route.
Advice
How the job changes by surface
External movement joints
Movement joints are cleaned out, backed with rod and resealed with a sealant of the right movement class.
Estate-wide resealing programmes
Consistent products and colours across an estate make future maintenance simpler and easier to manage.
How the quote is worked out
What shapes the price:
- Removal of failed or old sealant
- How accessible the joints are
- Which sealant the job calls for
- Working within restricted access windows
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Sending details for a quote
Whether it’s one area or a whole building, the same details help:
- Rough lengths or quantities, or drawings if you have them
- The asbestos register, for older buildings
- Any specification or named product
- How the joints are reached, and at what height
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to give us a call on 01277 525 020 or email drawings and photos with what you know.
Nearby places to Merston
Also in Merston
Site staff or a sealant specialist?
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.