The Mastic Doctor team standing beside their branded vans outside an office building
West Sussex · England

Mastic contractors in Three Bridges

Construction mastic in Three Bridges, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Frame perimeters left unsealed or poorly sealed
  • A mastic package split between trades with no clear owner
  • External joints sealed in damp or cold conditions that are now failing
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Construction mastic near Three Bridges

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Contractors’ notes for Three Bridges

Three Bridges sits in one of the drier corners of the country, the South East. Winter mornings still bring frost and condensation on frames and panels, so the external programme keeps a little slack. Three Bridges sits in or beside Crawley, a twentieth-century planned town. Regeneration of planned-town buildings brings recladding and replacement windows, each with joints to seal.

Hotels like Sandman Signature London Gatwick Hotel, 0.7 miles north-west of Three Bridges, rarely close for long, so refurbishment mastic is phased floor by floor. For contractors refurbishing units at places like Worth Corner Business Centre, 0.6 miles east of Three Bridges, the mastic covers cladding panels, roller-door and window perimeters. Projects at colleges like Crawley College (0.9 miles west of Three Bridges) tend to run to term dates, so the mastic is planned tightly.

Three Bridges is about 1 mile east of Crawley, in West Sussex. We cover commercial sites throughout Three Bridges, whether it’s a single job or part of a planned programme. 373 places across West Sussex fall within our area, including Three Bridges. For work in that direction, see our Brighton page.

Postcode districts covered here: RH10 for mastic packages. We cover commercial and managed buildings on Ash Road, Mill Road and North Road. Nearby places we also cover include Pound Hill (1 mile north-east), Worth (1 mile south-east), Maidenbower (1 mile south-east), Tilgate (1 mile south-west) and Crawley (1 mile west). Bigger towns within reach include Horsham (8 miles south-west), Haywards Heath (9 miles south), Burgess Hill (11 miles south), East Grinstead (7 miles east), Billingshurst (14 miles south-west) and Bewbush (3 miles west).

Near you in Three Bridges

In Three Bridges, that means premises near Hazelwick School, Central Sussex College and Grattons Park, among other places. Three Bridges has its own railway station: Three Bridges station. Well-known places in the area include Crawley Hospital (1.6 miles west) and Crawley Museum (1.2 miles west). Not far away are Tilgate Lake.

Map of Three Bridges © OpenStreetMap contributors

About our construction mastic in Three Bridges

We work to the specification and the programme rather than whatever product is to hand. Where the specification names a product, we use it. Joint widths, backing, primers and tooling follow the manufacturer’s guidance. We work on brick and block movement joints, internal decorators’ caulk and sanitary and kitchen joints, and what we’re called in for most is window and door perimeters that won’t pass inspection and a long mastic snag list close to completion. Whoever orders the work in Three Bridges, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.

In a smaller place such as Three Bridges, construction tends to mean small housing schemes, conversions and extensions to community buildings. Small schemes still need window perimeters, facade joints and internal sealant done to the specification.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

Where
Three Bridges (RH10)
Region
West Sussex
Cover
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Our process

Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then we prepare and seal each joint with the specified product, and the job ends with a walk round and sign-off. What matters most for a job in Three Bridges is a clear list of what needs doing. A fixed quote follows.

  1. First we look at the scope on site or from drawings.
  2. A fixed quote sets out scope, products and phasing.
  3. Site paperwork is confirmed and our CSCS-carded applicators are inducted.
  4. Sealing follows the programme as areas are released.
  5. Any frame gaps or issues outside our scope are flagged to the site team.
  6. The package is closed out, snags cleared and backed by our 12-month guarantee.

Getting the site ready

  • Send any specification or drawings in advance
  • Tell us your opening times and when work is allowed
  • Let us know about inductions and permits

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. For smaller jobs, photos and a description will do.

Get a quick quote

Related advice

Surface by surface

Bathrooms, en suites and washrooms

Sanitary joints around baths, showers, basins and WCs need anti-mould sanitary silicone. Joints are cleaned, sealed and tooled neatly.

External facade and movement joints

Movement joints in the facade are sealed with a product suited to the expected movement. Depth is controlled with backing rod so the bead bonds to two sides only.

Your questions answered

Can you work around term dates at a campus such as Crawley College?

Yes, holiday working periods are the norm on campus jobs. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Will you take on work at estates like Worth Corner Business Centre, close to Three Bridges?

Yes. Our area takes in Three Bridges and its surroundings, with estates and business parks such as Worth Corner Business Centre included. A few photos and the unit address let us price the work.

Can you work while the building is occupied?

Yes, with some planning. Tell us your site hours and access windows and we’ll plan around them.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

What guarantee comes with a mastic package?

Our workmanship carries a 12-month guarantee from sign-off. The guarantee covers our work, not later damage by other trades.

Does the weather affect the work?

Outside, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

What sealant work can’t fix

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Specifying the product where the designer hasn’t
  • Rework caused by others damaging completed areas
  • Glazing units that are cracked or misted

Not sure which it is? You can call 01277 525 020 or use the quote form and we’ll tell you honestly before you book.

Surfaces we seal

  • Sanitary and kitchen joints
  • Internal decorators’ caulk
  • Cladding and panel joints
  • Window and door perimeters
  • Brick and block movement joints
  • Floor and skirting junctions

When to bring in a specialist

Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Quoting for work in Three Bridges

These are the things that shape the price:

  • Removal of failed or old sealant
  • Distance, for remote addresses
  • Phasing around occupants
  • Site requirements such as inductions and permits

Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.

Before you send an enquiry

Whether it’s one area or a whole building, these details speed things up:

  • Any specification or named product
  • Approximate linear metres or a joint schedule
  • Where the site is, with the postcode
  • The asbestos register, for older buildings

Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, call 01277 525 020 or email a schedule or drawings.

After the work

Problems stay small when the joints are checked regularly. In particular:

  • Bring the mastic contractor in after the last trades are through
  • Ask for joint and product checks before the package is urgent
  • Keep finished joints away from paint, plaster and scrapers
  • Note which sealant went where at handover

Tell the builders’ clean team which areas have new sealant. Blades and abrasive pads are the commonest cause of damage at the final clean, so stick to soft cloths and gentle cleaners near sealant.

Sealing outside when the joint is damp or too cold leads to poor adhesion. Holding off until conditions suit avoids callbacks.

Accreditations

Trusted. Accredited. Insured.