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

Mastic Sealing in Chailey

We carry out mastic sealing for building owners, managing agents and housing associations in Chailey and the surrounding area. Send details for a fixed quote.

  • Cracked, hardened mastic round windows on a block
  • Water getting in round frames after rain
  • Patchy repairs in mismatched sealant
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
Constructionline member
£5m public liability

Mastic sealing near Chailey

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

Diagnose, treat, sign off

In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before the next one starts. If others near Chailey need work, visits can be combined, which keeps travel down. You will have a fixed quote before work starts.

  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. The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
  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.

Preparing the site

  • Let building users know which areas are affected
  • Tell us your opening times and when work is allowed
  • Share the asbestos register for older buildings

Quotes

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. If the job needs a look first, we will arrange a site visit.

Get a quick quote

Read more

Mastic sealing in Chailey

Treatment starts with a proper look: which joints have failed, why, and whether sealant is the right answer. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed, with backing rod setting the depth where it’s needed. The enquiries we see most involve old repairs sealed over failed mastic and movement joints with sealant missing, across balcony and threshold joints, external wall and movement joints and window and door perimeters on blocks. Searching for sealant specialists in Chailey? We have been sealing commercial buildings since 2005, with CSCS-carded applicators.

Rural conversions near places like Chailey often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.

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.

Where
Chailey (BN8)
Wider area
East Sussex
Guarantee
12 months on every job
Quote
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

How the job changes by surface

Window and door perimeters on blocks

Window and door perimeters are where most mastic failure shows. We remove the failed mastic, prepare the faces, add backing rod if the joint is deep and reseal.

Commercial and mixed-use buildings

Tenants in commercial buildings need to keep trading, so we plan around them.

Work for main contractors and building owners

Whether you are 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. We can agree access arrangements and keyholder contacts beforehand.

Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, and each stage is agreed with your contact.

Looking after the joints

Once the work is signed off, these steps help:

  • Make mastic part of routine maintenance checks
  • Share your contractor requirements early
  • Track which buildings were done and when
  • Make it easy for occupiers to report draughts

Log the date and extent of the resealing for each block. That makes future programmes easier to plan and shows what was done.

Joints on a building age together so a single failure is a sign to check the rest. Doing them together saves going back again and again.

Questions we’re asked in Chailey

We manage a building near Plumpton station. Can you help?

Yes, we work for agents, landlords and housing associations with blocks of every size. We work to your notice and access arrangements.

Is Chailey off your patch?

No. Places such as Chailey are covered as much as the big towns. London and every South East county are within our area. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Do you do block-wide mastic programmes?

Yes, planned programmes suit estates and portfolios. You get a fixed quote per building or for the whole job.

How do you choose the sealant?

If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Can you send RAMS and CSCS details before starting?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We hold CHAS accreditation and Constructionline membership.

When can the area be used after sealing?

We will confirm how long the chosen product needs to cure.

How do you handle work on occupied blocks?

We plan around people living or working in the building. We agree the programme so you can notify occupiers, and entrances stay in use.

When to bring in a specialist

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.

Honest limits

Some faults sit outside our scope, and we point that out rather than sealing over them:

  • Substrate edges that need repairing first
  • Frames that are rotten, warped or broken
  • Roof leaks, gutters or failed flashings that aren’t sealant joints

If you are not sure, just speak to us on 01277 525 020 or email drawings and photos and we will give you a straight answer before you book.

What we seal

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

Blocks and managed buildings in Chailey

Chailey is in the South East, one of the UK’s drier regions. Even so, frame mastic only goes on in dry, workable conditions, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first. Central London is about 37 miles from Chailey. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres, and window and balcony mastic on them tends to age at the same rate.

Site managers at schools like Chailey St Peter's Church of England Primary School can fit frame mastic into the summer works. Older community buildings, The Parish Church of St Peter among them, often have frames of mixed ages whose mastic varies. For agents with blocks near Plumpton station, 3.1 miles to the south-west of Chailey, a block-wide mastic programme deals with frames, balconies and entrances in one go.

Chailey is about 5 miles south-east of Haywards Heath, in East Sussex. We cover commercial sites throughout Chailey, for single jobs and planned programmes alike. Our East Sussex coverage takes in 308 places, large and small. For work in that direction, see our Brighton page.

We cover the BN8 postcode districts. Nearby places we also cover include North Chailey (1 mile north), South Street (1 mile south-west), Newick (1 mile north-east), Founthill (1 mile east) and South Chailey (2 miles south-west) for mastic joints. A short drive away, we cover Seaford (14 miles south), Lewes (6 miles south), Hailsham (13 miles south-east), Crowborough (10 miles north-east), Uckfield (5 miles east) and Newhaven (12 miles south).

Near you in Chailey

In Chailey, that means premises near Chailey School, The Five Bells Inn and Chailey Heritage School, among other places. The closest station to Chailey is Plumpton station, about 3.1 miles south-west of the centre. A little further out are Princess Royal Hospital (4.1 miles north-west). Not far away are Blackcap and Bedelands Farm Nature Reserve.

Map of Chailey © OpenStreetMap contributors
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