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

Dial Post mastic sealing

Planning work on a mastic joint in Dial Post? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Patchy repairs in mismatched sealant
  • Failed external movement joints
  • Brittle perimeter mastic across a building
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
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m PL insurance

Mastic sealing near Dial Post

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

Do you need mastic sealing in Dial Post?

Sunlight and weather break mastic down over time. The surface chalks, the body stiffens and cracks appear, especially on south and west faces.

Most enquiries start with something like this:

  • Patchy repairs in mismatched sealant
  • Draught complaints from residents or tenants
  • Complaints coming in block by block
  • Damaged joints in communal entrances and corridors

Landlords with units on estates such as Pondtail Farm (Business Park) (2.2 miles north of Dial Post) can bring frame, door and external mastic across several units into one programme.

Questions to ask before you book

  • Are they CHAS accredited or on Constructionline?
  • Whether their applicators hold CSCS cards
  • How they handle RAMS and site documents
  • Proof of insurance

Questions to ask before you appoint anyone

Mastic sealing for commercial buildings in Dial Post

For over 20 years we have resealed joints for owners, agents and landlords. Every applicator holds a CSCS card and we hold public liability insurance. Each building we complete carries a 12-month guarantee on our workmanship. We work on balcony and threshold joints, communal kitchens and washrooms and communal entrances and stairwells, and the usual reasons a site gets in touch are draughts at frames across a block and patchy repairs in mismatched sealant. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in Dial Post it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Owners and agents with buildings around smaller places such as Dial Post tend to manage small terraces of association properties, converted barns and commercial units. Frame and wall-joint mastic on all of them ages and hardens.

Whoever the client is, the cover is the same: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we’re upfront about that.

Place
Dial Post (RH13)
Wider area
West Sussex
Guarantee
12 months on our workmanship
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Questions we’re asked in Dial Post

Can one quote cover a number of our buildings near Dial Post?

Yes. Portfolio-wide programmes are a regular request. We can phase the programme to suit your budgets and notice periods.

Is a smaller place like Dial Post outside your area?

Not at all: smaller places are covered as well as towns. 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 check for asbestos in old sealant?

In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.

How long will the new sealant last?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

Can people stay in the building while you reseal?

We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told and communal access is kept open.

How do you choose the sealant?

A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.

Can you seal joints high up on a block?

We talk through access for each building when we quote. Tell us the building height and any access already in place and we will confirm the approach in the quote.

How a job runs

At the end of each section, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area. Rural sites near Dial Post may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.

  1. First we look at the mastic on each building and note what needs replacing.
  2. We send a fixed quote that sets out the joints, the products and the programme.
  3. Dates, areas and access are agreed so residents or tenants can be told in advance.
  4. Old sealant is stripped and each face prepared back to firm material.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Each building is checked on completion and the work carries our 12-month guarantee.

Getting the site ready

  • Send asbestos survey details if the building is pre-2000
  • Let building users know which areas are affected
  • Flag any permit to work we will need

Ask for a quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or email us with what you know.

Get a price

Read more

For managing agents and facilities managers

CHAS accredited and a Constructionline member, we make supplier vetting simple. We are fully insured, and our insurance certificate can go with the quote.

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

Blocks and managed buildings in Dial Post

The South East is one of the drier parts of the UK. External mastic still waits for dry faces and the right temperature, and south- and west-facing elevations, which take the most sun and rain, often age first. Dial Post is about 39 miles from central London. Managed blocks of flats are a big part of commuter-belt property; their frame mastic often ages block-wide.

Around Dial Post, a planned programme renews failed mastic across a building or estate in one go.

Dial Post is about 7 miles south of Horsham, in West Sussex. Dial Post sits inside our coverage and the rest of West Sussex, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Our West Sussex coverage takes in 373 places, large and small. There’s a separate page for Brighton, about 13 miles away.

Work on mastic joints is covered throughout RH13, for business premises of every kind. Streets here include The Green, Swallows Lane and Bentons Lane, and sites on any of them can send details for a fixed quote. Sites close to Dial Post are covered too, including Whitehall (2 miles north-west), Shipley (2 miles north), West Grinstead (2 miles north-east), Broomer's Corner (2 miles north-west) and Partridge Green (2 miles east). A short drive away, we cover Crawley (13 miles north-east), Horsham (7 miles north), Worthing (10 miles south), Haywards Heath (12 miles east), Burgess Hill (10 miles east) and Littlehampton (13 miles south-west).

Around Dial Post

Open spaces near Dial Post include Knepp Wildland and Chanctonbury Hill.

Map of Dial Post © OpenStreetMap contributors

Looking after the joints

Regular inspection catches problems early. In particular:

  • Avoid piecemeal callouts where you can
  • Have the asbestos survey to hand for older buildings
  • Keep a record of when each building was resealed
  • Mention RAMS, insurance or CSCS requirements up front

Ask residents or tenants to report draughts or leaks round windows early. Early reports catch failures before damage spreads.

Left open, joint edges in render, brick or frames can deteriorate. Once that happens, repairs come before resealing.

Surface by surface

Tenement and older buildings

Stone needs a neutral-cure product, so we pick a grade that won’t mark it.

External movement joints

Failed sealant is removed, backing rod inserted to control depth and the joint resealed with a grade whose movement class fits.

Doing it in-house

Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.

Accreditations

Trusted. Accredited. Insured.