Mastic contractors in Sidlesham
Mastic packages for new-build and refurbishment projects in Sidlesham. CHAS accredited and fully insured, with a 12-month guarantee.
- Existing joints on a refurb that need cutting out and resealing
- Sealant knocked or painted over by other trades
- New external sealant already peeling away
Construction mastic for businesses in Sidlesham
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Construction mastic in Sidlesham
On refurbishments, the mastic package usually includes cutting out old sealant as well as sealing new work. Old beads come out completely, as fresh silicone can’t grip old, and on older buildings we ask for the asbestos survey before disturbing anything. After that, the joints are prepared and sealed to the specification. We work on brick and block movement joints, window and door perimeters and cladding and panel joints, and what we are called in for most is perimeter gaps outside the sealant’s range and early adhesion failures on new external joints. A single leaking joint is often how a building in Sidlesham first comes to us: we look at the rest while we’re there and tell you what we find.
Construction in and around smaller places such as Sidlesham is often barn conversions, small groups of houses or extensions to halls and schools. Each still needs a proper mastic package: window perimeters, facade joints and internal sealant to the specification.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Place
- Sidlesham (PO20)
- Region
- West Sussex
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
What sealant work can’t fix
A proper diagnosis includes knowing what sealant can’t do. We’ll tell you if the real problem is any of the following:
- Approving fire stopping as compliant
- Joints damaged after sign-off by following trades
- Specifying the product where the designer hasn’t
If you are not sure, just call the office on 01277 525 020 or email drawings and photos and we’ll give you a straight answer.
Joints and surfaces we work on
- Floor and skirting junctions
- Sanitary and kitchen joints
- Window and door perimeters
- Brick and block movement joints
- Cladding and panel joints
- Internal decorators’ caulk
After the work
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:
- Don’t force external sealing on a damp or frosty day
- Keep product details for future maintenance
- Keep scrapers and abrasive pads off new beads
- Protect sealed areas from following trades
Record which products went where in the handover file. Future maintenance is easier when the products are known. We can confirm the handover information you need when we quote.
External joints sealed in poor weather are a common cause of early failure. Waiting for a dry joint and the right temperature is better than redoing work so external sequencing builds in some flexibility.
Building owners, agents and FMs in Sidlesham
Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end.
On site: what to expect
Before we leave any area, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area. Rural sites near Sidlesham may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- Drawings, specification and programme come to us.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- Snags are cleared and the package signed off with our 12-month guarantee.
Before we start on site
- Confirm the product named in the specification
- Explain the parking and delivery arrangements
- Let building users know which areas are affected
Get a fixed quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.
Read more
Sites and facades in and around Sidlesham
Sidlesham sits close to the coast, within about 1 mile. Coastal exposure means perimeter and cladding joints work harder than on an inland job, and the sealant, primer and backing need choosing with that in mind. The South East is one of the drier parts of the UK. Even so, frost and condensation on steel and glass are common on winter mornings, so external mastic is timed for workable conditions and agreed with the site manager.
Projects at colleges like West Sussex Alternative Provision College, 2.8 miles north of Sidlesham, tend to run to term dates, so the mastic is planned tightly. Extensions at sites like St Richard's Hospital, 4.7 miles north of Sidlesham, usually sit beside working departments, and the mastic follows strict access rules.
Sidlesham is about 3 miles north of Selsey, in West Sussex. Across the PO20 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Sidlesham is one of 373 places in West Sussex on our list for mastic packages. Our Portsmouth page has more on work in that area (13 miles or so).
We cover the PO20 postcode districts for mastic packages. Among the streets we cover are Rookery Lane, Selsey Road and Manhood Lane, and sites on any of them can send details for a fixed quote. Main routes into Sidlesham include the B2145, which helps when planning parking and deliveries for the job. Nearby places we also cover include Keynor Estate (1 mile south-west), Street End (1 mile north), Sidlesham Common (1 mile north), Fisher (2 miles north-east) and Church Norton (2 miles south). A short drive away, we cover Bognor Regis (4 miles east), Chichester (4 miles north), Selsey (3 miles south), Littlehampton (11 miles east), Rustington (12 miles east) and Angmering (14 miles east).
Local landmarks in Sidlesham
Sidlesham’s nearest station is Chichester station, about 3.9 miles north. Other landmarks nearby include St Richard's Hospital (4.7 miles north) and Chichester Castle (4.4 miles north).
Signs you need construction mastic in Sidlesham
Frames installed with uneven gaps make perimeter sealing harder. Every product has limits on how wide a joint it can bridge. Better to raise it at the start than seal a joint that’s bound to fail.
These are often picked up first by site or facilities staff:
- Cracks opening in caulked internal joints
- Old sealant on a refurbishment that needs stripping before new work
- Early adhesion failures on new external joints
- Perimeter gaps outside the sealant’s range
New units and refits on sites such as Enborne Business Park, 0.8 miles to the south of Sidlesham, need their panel and perimeter joints sealed to the specification.
Questions to ask before you book
- How they handle RAMS and site documents
- Proof of insurance
- How they’ll work around occupants
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Also near Sidlesham
More services for Sidlesham
Your questions answered
Can being near the sea in Sidlesham affect the sealant we need?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Does your area include sites such as Enborne Business Park, near Sidlesham?
Yes. Estates, retail parks and business parks around Sidlesham, Enborne Business Park among them, are all within reach. A few photographs and the unit address let us price the work.
What will the job cost?
Every job gets its own fixed quote. To get one, speak to us on 01277 525 020 or send photos by email.
How do I request a quote?
The quote form is the simplest route, though you can also call 01277 525 020 or email drawings and photos. Include photos or drawings if you have them.
Does weather affect external mastic work?
External sealing goes ahead only with a dry joint inside the product’s temperature range. Sealing in poor conditions risks adhesion failure, so we wait rather than redo work.
What accreditations do you hold?
Our applicators hold CSCS cards, and we are CHAS accredited and a Constructionline member. Public liability insurance of five million pounds is in place too.
Are you insured?
Yes. Mastic Doctor is fully insured, public liability included.
How the job changes by surface
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. The sealant is a kitchen-grade product, food-safe where food contact is possible.
Internal decorators’ caulk
Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s paintable and suits gaps that don’t move.