Bosham construction mastic
Mastic packages for new-build and refurbishment projects in Bosham. CHAS accredited and fully insured, with a 12-month guarantee.
- Failed sealant in an existing building being refurbished
- Different trades sealing to different standards
- Bath and shower joints scraped during the final clean
Construction mastic near Bosham
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Our process
In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before the next one starts. Smaller jobs around Bosham can be grouped with others nearby. You will have a fixed quote before work starts.
- Drawings, the sealant specification and your programme come to us for pricing.
- We return a fixed quote that ties the mastic package to your programme.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- We seal each plot or floor as it’s released to us.
- Every joint is prepared, set to depth and sealed with the specified product.
- Snags are cleared before handover and completed areas carry our 12-month guarantee.
Before we start on site
- Share the asbestos register for older buildings
- Share your working hours and any access restrictions
- Flag any permit to work we’ll need
Getting a fixed quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to ring 01277 525 020 or use the quote form.
Advice
How we handle construction mastic in Bosham
We work to the specification and the programme, not to habit. If a product is named, that’s what goes in, and if an alternative is proposed, it goes to you for acceptance first. Joint widths, backing, primers and tooling follow the manufacturer’s guidance so the detail on the drawing is what ends up on site. Site teams most often ask us about cracks opening in caulked internal joints and failed sealant in an existing building being refurbished, on brick and block movement joints, sanitary and kitchen joints and window and door perimeters. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Bosham, preparation and product choice get the time they need.
Sites around smaller places like Bosham can be a fair drive from suppliers, so we come with everything the package needs, timed to the stage the job has reached. Drawings, photos and the programme let us give a fixed quote.
What our 12-month guarantee covers is the way we did the job: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Place
- Bosham (PO18)
- Wider area
- West Sussex
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Should maintenance staff do it?
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Some joints are best left to specialists: 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.
Places near Bosham
What else we do in Bosham
Why it’s worth doing now in Bosham
Getting the mastic contractor involved early pays off. Early involvement means gaps, products and access are sorted before the programme bites. Called in at the end, the same issues surface during handover. Halls, stores and units around places like Bosham may not be checked every day, which gives a failed joint time to do damage. Resealing early avoids that.
What a job costs comes down to the quantity of joints, how much old material needs removing and how the joints are reached. Call for a quote once you have the details.
Why clients in Bosham choose us
- Constructionline member
- A fixed quote before work starts
- RAL and finish matching where the product range allows
- Colour options checked against the specified product
Questions about Bosham
Could you schedule work at a campus like University of Chichester for the vacation?
Yes, holiday working periods are the norm on campus jobs. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Can you work on a hospital site such as St Richard's Hospital?
Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.
Do you do fire-rated sealing on new builds?
It can be part of the package where specified. Tell us what records you need and we will confirm with the quote.
What joints do you seal on a new build?
Window and door perimeters, internal decorators’ caulk where specified, sanitary joints, kitchens, movement joints and snagging. The scope follows your specification.
How long before the joints can be used?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Does weather matter for sealant work?
Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
Does weather affect external mastic work?
External mastic depends on conditions: each sealant has a temperature range, and the joint must be dry. We plan external elevations with that in mind.
How the job changes by surface
Snagging before handover
Snags normally come from damage by following trades, missed joints or poor earlier work. We price snagging as part of the package or as a separate visit, depending on what suits the programme.
Kitchens and utility areas
Kitchen joints are sealed after fitting and before final clean. The sealant is a kitchen-grade product and hygienic or food-safe grades wherever food contact is possible.
When something else is needed
Being straight saves everyone time. Fresh joints won’t solve:
- Designing joint widths or choosing the specification (that sits with the designer)
- Deciding which fire-stopping product a penetration needs
- Defective windows, doors or glazing units (the supplier or installer’s job)
If in doubt, speak to us on 01277 525 020 or email a schedule or drawings and we’ll say what we think.
Where we work in Bosham
- Sanitary and kitchen joints
- Window and door perimeters
- Floor and skirting junctions
- Cladding and panel joints
- Internal decorators’ caulk
- Brick and block movement joints
Maintenance after handover
Once the work is signed off, a little attention goes a long way:
- Ask cleaners to use soft cloths around fresh sealant
- Don’t force external sealing on a damp or frosty day
- Protect sealed areas from following trades
- Bring the mastic contractor in after the last trades are through
Tell the builders’ clean team which areas have new sealant. Scrapers used on frames and worktops can nick or lift a new bead, so stick to soft cloths and gentle cleaners near sealant.
In wet areas, a weak sanitary joint shows up quickly once the building is occupied. Leaks behind showers and basins damage finishes and floors, and the repair falls into the defects period. Getting the product and preparation right first time avoids that.
Sites and facades in and around Bosham
The sea is no more than about 2 miles from Bosham. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, and the sealant, primer and backing need choosing with that in mind. Rainfall across the South East, Bosham included, is lower than in many parts of the UK. Even so, frost and condensation on steel and glass are common on winter mornings, which is why external dates are agreed with the site manager.
Building work at universities like University of Chichester (to the east of Bosham) is often timed for the summer, mastic included. For a contractor at a hotel such as The Millstream Hotel, under half a mile west of Bosham, the mastic often has to be finished before a reopening date. Units on estates such as Southfield Industrial Park. (less than half a mile north of Bosham) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Bosham is about 3 miles west of Chichester, in West Sussex. We send applicators to Bosham for mastic packages. We work across 373 places in West Sussex, large and small. For work in that direction, see our Portsmouth page (10 miles or so).
We cover the PO18 postcode districts for mastic packages. Streets here include High Street, Viking Way and Merryweather Road. Just outside Bosham, we also work in Broadbridge (1 mile north-east), Chidham (1 mile west), Bosham Hoe (1 mile south), Nutbourne (2 miles north-west) and Fishbourne (2 miles east). Nearby towns on our patch include Bognor Regis (8 miles east), Chichester (3 miles east), Selsey (7 miles south-east), Littlehampton (14 miles east), Rustington (15 miles east) and Portfield (4 miles east).
Landmarks near Bosham
Locally, jobs take us to sites close to The Berkeley Arms Public House, among other places. The closest station to Bosham is Bosham station, roughly 0.8 miles north-east of the centre. Well-known places in the area include Chichester Cathedral Treasury (3.2 miles east) and St Richard's Hospital (3.8 miles east). Not far away are Nutborne Marshes and Stoke Down.