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

Facade Sealing in Cross Gate

Sealant work in Cross Gate for main contractors, managing agents and facilities managers: facade joint and window perimeter sealing on commercial buildings, with a fixed quote first.

  • Unsightly perimeter sealant on a visible elevation
  • Previous reseals run over old sealant
  • Cold air coming in at window perimeters
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
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Facade sealing near Cross Gate

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

Facade sealing in Cross Gate, done properly

Every facade quote starts with how the joints will be reached. Let us know what access exists or is planned, and any site rules we need to work around, and we will fit the work around it. If you’re dealing with old perimeter mastic that has dried out and failed seals around shopfront and entrance frames, we can help, whatever the surface. For commercial sealant work in Cross Gate, you deal with one contact from quote to sign-off, whether it’s one building or several.

Sites around smaller places like Cross Gate can be a fair drive from suppliers, so we come with everything the package needs, timed to the stage the job has reached. Send drawings or photographs and the programme and we will quote to suit.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Cross Gate (BN18)
Region
West Sussex
Guarantee
A 12-month guarantee
Quote
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026

How the job changes by surface

Perimeter joints at frames and structure

Where framed systems such as shopfronts meet the building structure, there is a perimeter joint to seal. We seal those perimeter joints.

Render and coated surfaces

Where the joint will be painted over, a paintable hybrid or PU sealant may suit. The choice depends on the specification and finish.

On site: what to expect

Inspect, seal, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. Jobs in and around smaller places like Cross Gate are usually planned as a single visit, so photos and measurements up front really help. Then the right materials arrive with us.

  1. We plan access and the order of elevations with the client.
  2. Weather and temperature are checked against the product’s limits.
  3. Each joint is cut out and the edges inspected.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

Getting the site ready

  • Tell us your opening times and when work is allowed
  • Point out any areas we must not close
  • Let building users know which areas are affected

Get a fixed quote

Every quote starts with the facts: 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.

Get a price

Advice

Keeping the joints sound

Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:

  • Check the asbestos register before old mastic is disturbed
  • Inspect facade joints on a regular cycle
  • Avoid harsh cleaners on facade sealant
  • Combine resealing with other works that need access

If new signage, brackets or services are fixed through a sealed joint, the seal needs making good. Ask the installer to reseal it properly.

Don’t wait for a full elevation to fail. A few metres resealed promptly can stop water damage spreading inside the building.

Honest limits

A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:

  • Providing access systems for the work
  • Leaks from roofs, gutters or failed flashings rather than sealant joints
  • Joints too narrow for the movement they take, which need redesign

If you’re not sure, just ring 01277 525 020 or send photos by email and we will give you a straight answer before you book.

Joints and surfaces we work on

  • Shopfront frames
  • Window and door perimeters
  • Perimeter joints where frames meet the structure
  • Coping and flashing joints
  • Cladding panel joints
  • Stone and brick facade joints

When to call us in Cross Gate

The wrong product causes its share of trouble: acetoxy-cure silicone may mark stone or corrode certain metals, and an interior product won’t last outdoors. Most external joints call for a neutral-cure, facade-grade sealant.

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

  • Cladding panel joints that have opened up
  • Air leaks through failed facade joints
  • Facade joints cracked through the middle
  • Water coming in around window frames

Hospital estates such as Arundel and District Hospital, 4.5 miles south-west of Cross Gate, tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.

What your quote should include

  • Is the sealant right for the movement and the substrate?
  • How they handle RAMS and site documents
  • How joint depth will be controlled
  • How long is the guarantee, and what does it include?

How to choose a sealant contractor

Facade sealing in Cross Gate: the local picture

At about 44 miles from central London, Cross Gate is within reach of the capital. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, and each scheme needs its mastic sealed to programme. The South East is one of the drier parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so the external programme keeps a little slack.

Units on estates such as Quell Farm Industrial Estate (1.5 miles north-west of Cross Gate) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. School extensions, at buildings such as Amberley CofE Primary School, typically run to the summer holidays, mastic included.

Cross Gate is about 7 miles north of Littlehampton, in West Sussex. We cover Cross Gate and the rest of West Sussex, with the same fixed quotes and 12-month guarantee as everywhere else. Cross Gate is one of 373 places we cover in West Sussex. We also cover Brighton, around 18 miles from Cross Gate.

If you need facade sealing in BN18, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Just outside Cross Gate, we also work in Rackham (1 mile east), Amberley (1 mile south-west), Bury (2 miles west), Coldwaltham (2 miles north-west) and Watersfield (2 miles north-west). A short drive away, we cover Horsham (14 miles north-east), Worthing (8 miles south-east), Bognor Regis (11 miles south-west), Chichester (12 miles south-west), Littlehampton (7 miles south) and Shoreham-by-Sea (12 miles south-east).

Near you in Cross Gate

In Cross Gate, that means premises near Parham Park and the streets around them. Cross Gate’s nearest station is Amberley station, about 1.5 miles south-west of the centre. Well-known places in the area include Amberley Museum (1.4 miles south-west) and Amberley Castle (1 mile west). Green spaces nearby include Bignor Hill and Amberley Wild Brooks.

Map of Cross Gate © OpenStreetMap contributors

Questions about Cross Gate

Is a smaller place like Cross Gate outside your area?

No. Places such as Cross Gate are covered as much as the big towns. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.

Do you cover business parks and estates near Cross Gate, such as Quell Farm Industrial Estate?

Yes. Our area takes in Cross Gate and its surroundings, with estates and business parks such as Quell Farm Industrial Estate included. A few photos and the unit address let us price the work.

Can you find out why a window is leaking?

Yes. Photos help, and you can phone 01277 525 020 or send photos by email to arrange a visit. Failed perimeter sealant is a common cause, but not the only one.

Can the sealant be colour-matched?

In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We confirm what’s available for the specified product when we quote.

What hours do you work?

Give us your site hours and any access windows in your enquiry, and we’ll plan around them. Our office runs Monday to Friday, 8am until 5pm.

Can you work to our specification?

Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it, flagging anything that needs clarifying.

Are you insured?

Yes. Our insurance certificate can be sent alongside the quote.

Doing it in-house

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. Getting these wrong usually costs more in the end than doing them right.

Redoing a failed joint usually costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

Accreditations

Trusted. Accredited. Insured.