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

Mastic Sealing in Monk's Gate

Planning work on a mastic joint in Monk's Gate? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • A mix of products and colours from past repairs
  • No planned programme for sealant
  • Draughts at frames across a block
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Need mastic sealing in Monk's Gate?

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

Common problems we fix in Monk's Gate

Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified, the bead peels off one side.

Most enquiries start with one or more of the following:

  • Draughts at frames across a block
  • No planned programme for sealant
  • Mastic failing across several blocks on an estate
  • Communal area joints that look neglected

If your remit includes a building such as St Andrew's CofE Primary School, frame and door mastic can be programmed for the holidays.

Questions to ask before you book

  • Their pre-qualification and accreditations
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will RAMS and insurance details be available?
  • Will failed sealant be removed rather than covered?

Choosing a commercial sealant contractor

About our mastic sealing in Monk's Gate

For over 20 years we have resealed joints for owners, agents and landlords. Every applicator holds a CSCS card, and the work is backed by public liability insurance. Each building we complete carries a 12-month guarantee on our workmanship. We work on window and door perimeters on blocks, communal kitchens and washrooms and external wall and movement joints, and the failures we’re asked to look at most are communal area joints that look neglected and no planned programme for sealant. A specialist sealant contractor works differently from a general builder: on jobs in Monk's Gate, preparation and product choice get the time they need.

Around smaller places like Monk's Gate, older walls fitted with newer windows are a familiar sight. The mastic needs to suit an irregular masonry face and the look of the building.

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.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Monk's Gate (RH13)
Wider area
West Sussex
Guarantee
12 months on every job
Quote
A fixed quote before we start
Phone
01277 525 020
Last updated
3 November 2026

What happens if it’s left?

Dealing with failed joints one report at a time is slow and scattered. A planned programme treats each building once, under a single quote and a single programme. Halls, stores and units around places like Monk's Gate may not be checked every day, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.

Why us?

  • Clear, fixed quotes
  • One number for every site we cover
  • CHAS accredited
  • 12 months’ guarantee on every job

See our cost guide or how we’re accredited.

When something else is needed

A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:

  • Asbestos-containing sealant, which we don’t remove
  • Substrate edges that need repairing first
  • Glazing that needs replacing

Not sure which it is? You can call the office on 01277 525 020 or email us and we will tell you honestly.

Surfaces we seal

  • Communal kitchens and washrooms
  • External wall and movement joints
  • Communal entrances and stairwells
  • Window and door perimeters on blocks
  • Shopfronts below residential blocks
  • Balcony and threshold joints

What the job involves on each surface

Estate-wide resealing programmes

Using the same products throughout keeps the estate consistent and easier to manage.

Window and door perimeters on blocks

Blocks have a mix of frame materials, so the grade we pick has to bond to frame and wall alike. Colours are confirmed for the product used.

Owners, agents and contractors

We work for building owners and managing agents on everything from one building to a spread of sites around Monk's Gate. One quote can cover more than one site, so there’s one set of paperwork to deal with.

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.

Mastic sealing around Monk's Gate: what changes locally

Monk's Gate is in the South East, one of the UK’s drier regions. Outside mastic still needs a dry joint and the right temperature, and south- and west-facing elevations, which take the most sun and rain, often age first. At about 33 miles from central London, Monk's Gate is within reach of the capital. Commuter-belt towns tend to have plenty of managed blocks near stations and town centres, and window and balcony mastic on them tends to age at the same rate.

For agents with blocks near Horsham station, which lies north-west of Monk's Gate, a block-wide mastic programme deals with frames, balconies and entrances in one go. Churches, halls and community buildings such as Church of the Good Shepherd are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.

Monk's Gate is about 3 miles south-east of Horsham, in West Sussex. Our applicators travel to Monk's Gate for work on mastic joints, handled exactly as we handle every other area. 373 places across West Sussex fall within our area, including Monk's Gate. We also cover Brighton, some 16 miles away.

Work on mastic joints is covered throughout RH13, for business premises of every kind. We cover commercial and managed buildings on Coolhurst Close, Nuthurst Road and Brighton Road and the roads nearby. If your building is just outside Monk's Gate, we cover Mannings Heath (1 mile north), Lower Beeding (1 mile east), Crabtree (2 miles south-east), Plummers Plain (2 miles east) and Roffey (3 miles north). Further afield, our area takes in Crawley (7 miles north-east), Horsham (3 miles north-west), Worthing (15 miles south), Haywards Heath (9 miles east), Burgess Hill (9 miles south-east) and East Grinstead (14 miles north-east).

What’s near Monk's Gate

Around Monk's Gate, our work takes us to commercial buildings near The Dun Horse pub, Newells Preparatory School and The Forest School, among other places. For rail, the closest station is Horsham station, roughly 2.6 miles north-west. A little further out are Christs Hospital School Museum (3.4 miles west) and Horsham Hospital (3 miles north-west). Green spaces nearby include Warnham LNR.

Map of Monk's Gate © OpenStreetMap contributors

From enquiry to sign-off

Working in a building that stays open takes some planning. We sign and contain the area we are in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Smaller jobs around Monk's Gate can be grouped with others nearby. A fixed quote is given before anything starts.

  1. Each block or building is walked and the failed joints recorded with the likely cause.
  2. A fixed quote follows, split by block or building if that suits you.
  3. Dates, areas and access are agreed so residents or tenants can be told in advance.
  4. We remove the old mastic completely and clean the joint faces back.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Completed joints are inspected and carry a 12-month workmanship guarantee.

Before we start on site

  • Arrange parking or a loading space
  • Share your working hours and any access restrictions
  • Have the specification and drawings to hand

Quotes

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.

Get a quick quote

Related advice

Monk's Gate: questions and answers

Is Monk's Gate too far out for you?

Not at all. Monk's Gate is within our area. We cover Greater London and the counties of the South East. Where we can, we group nearby jobs to make the most of each trip.

Do you work for managing agents with blocks near Horsham station?

Yes. Blocks of any size are within what we do. Send the address, photos of the elevations and your access arrangements, and we will give a fixed quote.

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

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

Can you reseal a whole block or estate?

Block-wide and estate programmes are common. You get a fixed quote per building or for the whole job.

How long does a job like this take?

It depends on the scope, though a typical visit typically takes anything from a day to a few weeks, depending on the number of buildings and joints. For bigger or phased jobs, we will set out a timescale with the quote.

Can you seal joints high up on a block?

Every block is different. We agree access with you at quote stage so the fixed quote reflects it.

How soon can the area be used again?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, and we confirm it before leaving site.

Accreditations

Trusted. Accredited. Insured.