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

Construction and new-build mastic in Broad Green, Essex

Mastic packages for new-build and refurbishment projects in Broad Green. CHAS accredited and fully insured, with a 12-month guarantee.

  • A mastic package split between trades with no clear owner
  • Snag items on joints that need redoing before handover
  • Internal caulk splitting as the building dries out
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Construction mastic in Broad Green

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

Construction mastic in Broad Green

Buyers, tenants and clients notice sealant lines long before they notice the structure. A smeared bead round a window or a gap behind a worktop ends up on the snag list. We seal so the snag list stays short, area by area through the programme. If you have external joints sealed in damp or cold conditions that are now failing and cracks opening in caulked internal joints, we can help. A specialist sealant contractor works differently from a general builder: on jobs in Broad Green, preparation and product choice get the time they need.

Construction in and around smaller places such as Broad Green is often barn conversions, small groups of houses or extensions to halls and schools. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.

Every job we finish is backed by a 12-month workmanship guarantee, in Broad Green as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Place
Broad Green (CO6)
Wider area
Essex
Guarantee
A 12-month guarantee
Quote
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How a job runs

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 we move to the next. Smaller jobs around Broad Green can be grouped with others nearby. A fixed quote is given before anything starts.

  1. We price from the drawings, specification and programme you send.
  2. A fixed quote sets out the scope, the products and the sequence.
  3. Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
  4. We seal each plot or floor as it’s released to us.
  5. Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
  6. Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.

Getting the site ready

  • Arrange parking or a loading space
  • Have the specification and drawings to hand
  • Let us know about inductions and permits

Get a fixed quote

Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.

Get a price

Related advice

Aftercare for building managers

Your facilities or cleaning team can help the joints last. Share these points with them:

  • Get the mastic subcontractor involved early in the programme
  • Put any product change through the designer first
  • Allow flexibility for external sealing in damp or cold weather
  • Brief following trades on areas that have been sealed

After we’ve sealed an area, it helps to keep other trades from damaging the joints. Fresh sealant needs its cure time before it’s cleaned, painted near or knocked; we confirm the time for each product.

Frames with gaps too wide for sealant need sorting before the mastic goes on. Filling a wide gap with sealant alone sets up a failure. We raise them during our first walk of the area.

How the job changes by surface

Bathrooms, en suites and washrooms

In bathrooms and washrooms, an anti-mould sanitary silicone goes around every fitting. Each joint is prepared, sealed and finished with a neat tooled line, and any bath is loaded with water first where that’s the agreed method.

Internal decorators’ caulk

Caulk is easy to apply badly. A neat, consistent caulk line makes the decorators’ job quicker and keeps the snag list down.

Your questions answered

Can you work to our programme on a site in or near Broad Green?

Yes. Send the programme and drawings, and we’ll plan the mastic to suit the stages. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Is a smaller place like Broad Green outside your area?

Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

What do you charge?

There isn’t a price list, because every site is different. With photos or drawings, we can give you a fixed quote.

Can you fit around our working hours?

Mention the site’s hours and access windows in your enquiry, and we’ll schedule the work to suit. Our office runs Monday to Friday, 8am until 5pm.

Do you need to see the site first?

It depends on the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.

Do you install fire-rated sealant as part of a package?

It can be part of the package where specified. Tell us what records you need and we will confirm with the quote.

Are you insured?

Yes. We’re fully insured, and the certificate can go with your quote.

When to call us in Broad Green

A new building moves while it dries and settles. Plaster, screeds, timber and blockwork all shrink as they lose moisture and internal caulk in a moving joint is typically the first to crack. Choosing the right product for each joint reduces that.

Typical triggers for a call:

  • Cracks opening in caulked internal joints
  • Failed sealant in an existing building being refurbished
  • Window and door perimeters that won’t pass inspection
  • Different trades sealing to different standards

Historic houses such as Layer Marney Tower, 4.6 miles south-east of Broad Green, are a reminder of the older buildings in the wider area, where sealing against old stone, brick or timber needs compatible products.

Questions to ask before you book

  • How the joint faces will be prepared and primed
  • Is the sealant right for the movement and the substrate?
  • The terms of the workmanship guarantee
  • Who will actually carry out the work

How to choose a sealant contractor

New build and refits around Broad Green

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. Broad Green is about 44 miles from central London. Towns within reach of London tend to keep building, from flats to offices and schools, so mastic packages have to keep pace with busy programmes.

When a school such as Honywood Community Science School is extended or refurbished, the mastic package is often squeezed into the holidays. Units on estates such as Threshelfords Business Park, 2.4 miles to the south of Broad Green, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.

Broad Green is about 6 miles south-east of Halstead, in Essex. Across the CO6 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 644 places in Essex, large and small. There’s a separate page for London, roughly 44 miles from Broad Green.

Commercial sites across CO6 are covered. Just outside Broad Green, we also work in Surrex (1 mile west), Skye Green (1 mile south-west), Little Tey (1 mile east), Stocks Green (1 mile south) and Marks Tey (2 miles east). Further afield, our area takes in Colchester (7 miles east), Chelmsford (14 miles south-west), Braintree (7 miles west), Maldon (10 miles south), Witham (7 miles south-west) and Camulodunum (6 miles east).

Around Broad Green

Locally, jobs take us to sites close to Kings Arms, among other places. The nearest railway station is Marks Tey station, about 2.3 miles east. A little further out are Birch Castle (4.4 miles south-east) and Laundry & Mangle Museum (2.5 miles west). Open spaces near Broad Green include Iron Latch.

Map of Broad Green © OpenStreetMap contributors

What happens if it’s left?

Patching snags as they appear can feel quicker than a proper close-out. A planned sweep of each plot or floor catches the lot in one go. Snagging can be priced as a separate stage. Halls, stores and units around places like Broad Green may not be checked every day, which gives a failed joint time to do damage. Resealing early avoids that.

A quote for mastic packages depends on quantities, condition and access, plus any specification you’re working to. Ask us for a fixed quote.

Why us?

  • Fixed quotes based on photographs, drawings or a visit
  • A range of standard colours, depending on the product
  • Specification-led, product-correct work
  • One phone line for London, the South East and Scotland

Take a look at what affects the cost and how we’re accredited.

Doing it in-house

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.

Accreditations

Trusted. Accredited. Insured.