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

Colworth facade sealing

Facade joint and window perimeter sealing on commercial buildings throughout Colworth and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Perimeter joints where frames meet the structure
  • Draughts around frames and panels
  • Weathered facade joints that have lost their grip
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Facade sealing across Colworth

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Facade sealing for commercial buildings in Colworth

A good facade joint depends on design as much as product. Joint width needs to match how far the joint moves and how far the sealant can stretch, and closed-cell rod sets the depth, keeping the bond to two faces, often at around 2:1 width to depth, as the manufacturer advises. Site teams most often ask us about staining on stone next to old sealant and failed sealant on precast panel joints, across window and door perimeters, shopfront frames and stone and brick facade joints. Facilities teams, main contractors and managing agents in Colworth tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

For a site near Colworth, the mastic visit is planned so the right sealants, primers and backing rod are on hand. Drawings, photographs and the programme let us give a fixed quote.

A 12-month guarantee applies to all our work in West Sussex. Should something we installed fail, ring 01277 525 020 or use the quote form and we’ll come back to it.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Colworth (PO20)
Wider area
West Sussex
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

Questions about Colworth

Does the sea air around Colworth change the choice of sealant?

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.

Do you cover business parks and estates near Colworth, such as The Woodhorn Business Centre?

Yes. We cover Colworth and the area around it, including industrial estates, business parks and retail parks such as The Woodhorn Business Centre. To start, just call the office on 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.

Is your workmanship covered by a guarantee?

Yes. It runs for twelve months and covers how we prepared and sealed the joints, though not damage or work by other trades.

Do you replace windows or glass?

No. Glazing, windows and glass replacement aren’t part of our work. We seal the joints around them, such as perimeter joints where frames meet the structure.

Does weather matter for sealant work?

It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.

Can you work in cold or wet weather?

Wet joints or temperatures outside the product’s range mean waiting. The programme allows for it and we tell you if the forecast changes things throughout the job.

Will you just go over the old sealant?

No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.

Looking after the joints

A few simple habits keep the new joints working:

  • Keep the sealant details on the building file
  • Don’t wait for a second leak before calling
  • Check that rainwater leaves the facade the way it was designed to
  • Share access with other external trades

Let the new sealant cure before washing the facade or windows near it. Pressure washers and harsh cleaners can damage a fresh bead.

Check older buildings for asbestos before disturbing old mastic. Older sealants can contain asbestos.

What sets the cost

To price the job, we consider:

  • How much existing material needs removing
  • Backing rod, priming and other preparation
  • Working within restricted access windows
  • Location, for remote and island sites

We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote.

Sending details for a quote

Whether it’s one area or a whole building, the same details help:

  • Your programme or deadline
  • Approximate linear metres or a joint schedule
  • Anything awkward about access or site hours
  • The postcode of the building

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, speak to us on 01277 525 020 or use the quote form.

Do you need facade sealing in Colworth?

Not every failure is in the sealant: crumbling render, spalling concrete or flaking paint take the sealant with them. When the joint edges need repair first, we say so.

These are often picked up first by site or facilities staff:

  • Previous reseals run over old sealant
  • Discoloured or dirty facade joints
  • Water coming in around window frames
  • Air leaks through failed facade joints

Extensions at sites like Bognor Regis War Memorial Hospital (to the south-east of Colworth) normally sit beside working departments, and the mastic follows strict access rules.

Comparing quotes

  • Their plan for phasing and protecting the area
  • Health and safety accreditation such as CHAS
  • What site paperwork they can supply
  • How the existing material will be dealt with

Our contractor checklist

Different surfaces, different methods

Cladding panel joints

Panel joints on cladding and rainscreen systems take movement every day. We use a product rated for the movement and suited to the panel surface, as the specification sets out.

Brick and stone facades

Joints in natural stone need care to avoid staining. The specified stone-compatible sealant is what we use, and mask the edges carefully.

Mastic packages on Colworth sites

The sea is no more than about 3 miles from Colworth. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Central London is about 54 miles from Colworth. Construction around the commuter belt mixes station-side flats with refurbished offices and units, which keeps mastic packages in demand.

For contractors at a school such as Bartons Primary School, sealing has to be finished before term starts. Recladding or extending a unit at a site like The Woodhorn Business Centre, 1.1 miles north of Colworth, brings panel joints and frame perimeters into the programme.

Colworth is about 2 miles north of Bognor Regis, in West Sussex. Our applicators travel to Colworth for work on facade joints. Across West Sussex, 373 places are covered, including Colworth. Our Portsmouth page has more on work in that area.

Business premises anywhere in PO20 are within our area. Just outside Colworth, we also work in Merston (1 mile west), Oving (2 miles north-west), Lagness (2 miles south-west), Runcton (2 miles west) and Shopwyke (2 miles north-west). Nearby towns on our patch include Worthing (13 miles east), Chichester (4 miles north-west), Selsey (7 miles south-west), Littlehampton (8 miles east), Rustington (9 miles east) and Storrington (13 miles north-east).

Local landmarks in Colworth

Around Colworth, our work takes us to commercial buildings near The Regis School and The Brooks Local Nature Reserve, among other places. Colworth’s nearest station is Bognor Regis station, about 2.5 miles south-east. Nearby you’ll also find Bognor Regis Museum (2.7 miles south-east) and Tote Copse Castle (1.3 miles north-east).

Map of Colworth © OpenStreetMap contributors

How a job runs

Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and move on in phases so staff and visitors can carry on around us. Smaller jobs around Colworth can be grouped with others nearby. You’ll have a fixed quote before work starts.

  1. We start with photos, drawings or a visit to see the joints and agree access.
  2. Product choice follows the joint’s movement and substrate.
  3. The existing bead comes out in full.
  4. Primer goes on where the product data asks for it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. We go over the completed work with you before leaving.

Preparing the site

  • Have the specification and drawings to hand
  • Send your site hours and access windows
  • Point out any areas we must not close

Request a quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, give us a call on 01277 525 020 or email drawings and photos.

Get a quick quote

Read more

Doing it in-house

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.

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.

Accreditations

Trusted. Accredited. Insured.