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

Facade and window perimeter sealing in Crawley, West Sussex

Facade sealing for Crawley, from a contractor working since 2005. Fully insured, with a 12-month guarantee.

  • Damp patches beside frames after rain
  • Failed sealant on precast panel joints
  • Facade joints cracked through the middle
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
£5m PL insurance

Facade sealing across Crawley

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Site staff or a sealant specialist?

What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.

Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.

Facade sealing for commercial buildings in Crawley

Sealant around windows, doors and cladding panels stops rain reaching the wall behind. When a perimeter bead splits or peels, water finds its way behind frames and into the structure. We remove failed sealant and install a new bead chosen for the joint and how far it moves. The enquiries we see most involve unsightly perimeter sealant on a visible elevation and water coming in around window frames, on stone and brick facade joints, window and door perimeters and cladding panel joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Crawley, that means joint design, primers and backing rod as standard.

In a large town such as Crawley, plenty of construction is refurbishment: recladding units, new shopfronts, replacement windows. All of it ends in perimeter and panel joints that need correct sizing, backing and sealant.

Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.

Place
Crawley (RH10, RH11, RH12, RH6)
Region
West Sussex
Guarantee
12 months on every job
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Work for main contractors and building owners

Whether you’re a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.

Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, and our applicators hold CSCS cards.

What sets the cost

A fixed quote reflects the actual work. It takes account of:

  • Induction, permit and paperwork requirements
  • The product specified
  • Backing rod, priming and other preparation
  • Whether the work must be split into stages

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.

Details that help us quote

Good information means a firmer quote. When you get in touch, include:

  • Clear photographs of the problem areas
  • Drawings or a marked-up plan, if available
  • The postcode of the building
  • When you need the work done

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

Why deal with it now?

If access is already up for other work, resealing at the same time makes sense. Combine it with planned external works and you only arrange access once, saving a second set-up. On a busy site in a large place like Crawley, a failed joint gets worse with every day of use, until a reseal turns into a repair. Catching it early keeps the fix simple.

The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.

What you get with us

  • 12-month guarantee on workmanship
  • Matching to RAL references, product permitting
  • One phone line for London, the South East and Scotland
  • A Constructionline member, so easy to vet

See what affects the cost or our accreditations and insurance.

Different surfaces, different methods

Render and coated surfaces

Sealant can only hold as well as the render or paint beneath it. We remove flaking material so the bead bonds to a firm surface, and areas needing repair are flagged.

Coping and flashing joints

Not every coping or flashing leak is a sealant problem. We tell you if the fix is a roofing or metalwork job rather than a reseal.

From enquiry to sign-off

On arrival, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, and the work usually takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. Bigger buildings in Crawley are usually done in phases agreed with the site or facilities manager, so the building keeps working. Send drawings or photos and we’ll set out a phasing plan with the quote.

  1. First we review photos, drawings or what we saw on a visit, and agree how each joint will be reached.
  2. Failed sealant is cut out along its full length.
  3. Both faces are cleaned and, where the product needs it, primed.
  4. Backing rod, or bond-breaker tape in shallow joints, limits the depth.
  5. The new sealant goes in and is tooled firmly onto both faces.
  6. We walk the finished joints with you before handing over.

Preparing the site

  • Let building users know which areas are affected
  • Share the asbestos register for older buildings
  • Flag any permit to work we’ll need

Getting a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, speak to us on 01277 525 020 or send photos by email.

Get a quick quote

Read more

Your questions answered

Could you schedule work at a campus like Crawley College for the vacation?

Yes, holiday working periods are the norm on campus jobs. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Do you cover business parks and estates near Crawley, such as Denvale Trade Park?

Yes. Our area takes in Crawley and its surroundings, with estates and business parks such as Denvale Trade Park included. A few photographs and the unit address let us price the work.

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.

Do you work in Crawley?

Yes. We cover Crawley, and you can call 01277 525 020 or send photos by email to get started.

Do you guarantee your work?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

Is old mastic on our building likely to contain asbestos?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. Check the asbestos register or survey before it is disturbed; if it’s suspected, work stops until it has been tested. We don’t remove asbestos-containing materials.

Are your applicators CSCS-carded?

Yes. If you need card details for site access, tell us and we’ll confirm them with the quote.

Building and refurbishing in Crawley

Crawley was planned and built as a new settlement in the twentieth century. Buildings from that era are frequently being refurbished, with new windows and panels set into older structures. Central London is about 27 miles from Crawley. Construction around the commuter belt mixes station-side flats with refurbished offices and units, which keeps mastic packages in demand.

Further education sites such as Crawley College (to the north-east of Crawley) are extended and refurbished from time to time, with mastic often programmed into the summer break. For a contractor at a hotel such as Grange Hotel, less than half a mile north-west of Crawley, the mastic often has to be finished before a reopening date. New wings at hospitals like Crawley Hospital, 0.5 miles to the north-west of Crawley, bring long runs of window and panel joints to seal.

Crawley is about 27 miles south of London, in West Sussex. We send applicators to Crawley for facade joints, handled exactly as we handle every other area. Crawley is one of 373 places in West Sussex on our list. Our Brighton page has more on work in that area (19 miles or so).

We take on facade joints across the RH10, RH11, RH12 and RH6 postcode area. We cover commercial and managed buildings on Station Road, Queens Square and High Street. With the A23 and A264 nearby, Crawley is straightforward for us to reach. We also cover Southgate (1 mile south-west), Tilgate (1 mile south-east), West Green (1 mile north), Three Bridges (1 mile east) and Langley Green (1 mile north) for facade joints. Bigger towns within reach include Horsham (7 miles south-west), Haywards Heath (9 miles south-east), Burgess Hill (11 miles south), East Grinstead (8 miles east), Billingshurst (13 miles south-west) and Roffey (5 miles south-west). Crawley ranks among the main centres of West Sussex, with offices, shops, schools and other public and commercial buildings, and we cover them all.

Local landmarks in Crawley

Around Crawley, our work takes us to commercial buildings near Tilgate Park, St Wilfrid's Catholic School and St Francis of Assisi Catholic Primary School. There’s a railway station in Crawley itself: Crawley station. A little further out are Crawley Hospital (0.5 miles north-west) and County Mall (under half a mile north-east). For a walk, there’s Tilgate Lake.

Map of Crawley © OpenStreetMap contributors
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