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

Mastic sealing for building owners and managing agents in South Street, East Sussex

Sealant work in South Street for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.

  • No planned programme for sealant
  • Occupiers reporting cold air round windows
  • Cracked, hardened mastic round windows on a block
1
Send details
Send the specification, photos or a marked-up plan.
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.
Covering the South East & Scotland
Constructionline member
£5m public liability

Mastic sealing for South Street sites

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

About our mastic sealing in South Street

Different joints need different sealants. Low-modulus neutral-cure silicone suits many window perimeters and external movement joints, and MS polymer sealants stick well to many substrates and often take paint, and colours are confirmed for whichever product is used. If you’re dealing with leaks at window and door perimeters and repeated reactive repairs to the same buildings, we can help, on balcony and threshold joints, window and door perimeters on blocks and shopfronts below residential blocks alike. Whoever orders the work in South Street, the brief is normally the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Around smaller places like South Street, 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.

Whoever the client is, the cover is the same: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
South Street (BN8)
Wider area
East Sussex
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026

How the quote is worked out

To price the job, we consider:

  • Working within restricted access windows
  • Distance, for remote addresses
  • Induction, permit and paperwork requirements
  • How much there is to seal

A quote for mastic joints depends on how many there are, their condition and the access, plus any specification you’re working to. Ask us for a fixed quote.

What to include in your enquiry

To price the job accurately, we need a clear picture of the site. Useful things to include:

  • Whether an asbestos survey exists
  • Anything awkward about access or site hours
  • The type of building and who uses it
  • The product your specification calls for

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

Common questions from South Street clients

Is a smaller place like South Street outside your area?

No. Small places get the same service as large ones. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

Can you work at a site such as Park Farm Business Park, by South Street?

Yes. We cover South Street and the area around it, including industrial estates, business parks and retail parks such as Park Farm Business Park. To start, just ring 01277 525 020 or email the details over with the unit, the joints involved and your access times.

Is any job too small?

We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.

Can you take on resealing for a block portfolio?

Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords, and we quote building by building or as a programme.

What will the job cost?

We don’t publish prices, because every site is different. Send photos or drawings and we’ll price it at a fixed figure.

Which sealant will you use?

Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Do you check for asbestos in old sealant?

In older buildings, old mastic can contain asbestos. We ask for the asbestos register or survey before work starts, and if it’s suspected, work stops until it’s tested.

Looking after buildings in and around South Street

South Street lies roughly 38 miles out from central London. 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. Rainfall across the South East, South Street included, is lower than in many parts of the UK. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are usually where frame mastic ages first.

Older community buildings, The Parish Church of St Peter among them, often have frames of mixed ages whose mastic varies. For owners of several units at places like Park Farm Business Park, 2.7 miles west of South Street, one programme can deal with frame and external mastic across the lot. Buildings close to stations like Plumpton station, 2.2 miles to the south-west of South Street, are often flats over shops, with frame mastic to keep sound.

South Street is about 5 miles east of Burgess Hill, in East Sussex. Any commercial site in South Street is covered, for single jobs and planned programmes alike. South Street is one of 308 places we cover in East Sussex for mastic joints. We also cover Brighton, around 9 miles from South Street.

Work on mastic joints is covered throughout BN8. Streets here include Green Lane, Markstakes Corner and St James Walk, and sites on any of them can send details for a fixed quote. We also cover South Chailey (1 mile south), Chailey (1 mile north-east), North Chailey (2 miles north), Chiltington (2 miles south) and Plumpton Green (2 miles south-west). Bigger towns within reach include Seaford (13 miles south-east), Lewes (5 miles south), Hailsham (13 miles south-east), Crowborough (11 miles north-east), Uckfield (5 miles east) and Newhaven (11 miles south).

Around South Street

We work on buildings around The Five Bells Inn and Chailey St Peter's Church of England Primary School. For rail, the closest station is Plumpton station, roughly 2.2 miles south-west of the centre. Other landmarks nearby include Princess Royal Hospital (4.3 miles north-west). Open spaces near South Street include Blackcap and Malling Down.

Map of South Street © OpenStreetMap contributors

Surface by surface

Commercial and mixed-use buildings

Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. A planned programme suits multi-building portfolios.

Communal areas

Communal entrances, stairwells and corridors have joints at door frames, screens, skirting and floor edges. Tidy, sound joints keep them looking cared for.

Aftercare for building managers

Cleaning and maintenance staff play a part too. Share these points with them:

  • Group repairs into a planned programme
  • Ask residents or tenants to report leaks and draughts early
  • Check sealant joints during planned building inspections
  • Protect low-level joints in entrances

Keep records of when each building was resealed. It helps plan the next round and gives you a history.

Planned resealing is easier to budget than emergency repairs. We can quote buildings in priority order and work down the list.

How a job runs

When we get to site, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before anything is cut or cleaned, and the work typically takes a day or two for a single block, longer for an estate programme. Smaller jobs around South Street can be grouped with others nearby. A fixed quote is given before anything starts.

  1. We check the asbestos register for older buildings and look at the joints.
  2. A fixed quote covers the joints, products and order of work.
  3. Failed mastic is removed completely.
  4. Joint faces are cleaned, backed and resealed.
  5. We finish each building before moving to the next.

Preparing the site

  • Explain the parking and delivery arrangements
  • Send your site hours and access windows
  • Tell us which areas need to stay in use

Getting a fixed quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, give us a call on 01277 525 020 or email a schedule or drawings.

Get a quick quote

Advice

When something else is needed

Not every problem is a sealant problem, and we are upfront when that’s the case. These need a different solution:

  • Substrate edges that need repairing first
  • Leaks from above rather than through a joint
  • Failed window or door frames, which need a window contractor

If you’re not sure, just speak to us on 01277 525 020 or email us and we’ll give you a straight answer.

Where we work in South Street

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

General trades versus a specialist

For most general trades, sealant is a sideline. 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.

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.

Accreditations

Trusted. Accredited. Insured.