Mastic sealant contractors in Runcton
Mastic sealing for building owners, managing agents and housing associations across Runcton, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Estate-wide sealant that is simply worn out
- Draught complaints from residents or tenants
- Failed external movement joints
Need mastic sealing in Runcton?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our mastic sealing in Runcton
Most buildings come with mastic joints nobody has looked at since handover and it slowly wears out: window perimeters, door frames, external joints and communal junctions all rely on it. When it hardens, splits or pulls away, water and draughts follow along with complaints. Most enquiries involve a mix of products and colours from past repairs and repeated reactive repairs to the same buildings, across communal kitchens and washrooms, communal entrances and stairwells and balcony and threshold joints. Looking for mastic applicators who cover Runcton? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Owners and agents with buildings around smaller places such as Runcton tend to manage small terraces of association properties, converted barns and commercial units. Mastic around frames and on external joints wears out in time, whatever the building.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Location
- Runcton (PO20)
- Wider area
- West Sussex
- Cover
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
FAQs: Runcton
Does a coastal location like Runcton affect which sealant is used?
It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. Product choice and preparation matter more, and sea-facing elevations are worth inspecting more often.
Will you take on a block within reach of Chichester station?
Yes. Blocks of any size are within what we do. We work to your notice and access arrangements.
What about access for upper-floor joints?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we will confirm the approach in the 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, since fresh sealant will not bond reliably to aged material.
How do you handle work on occupied blocks?
Occupiers stay in the building throughout. If any flats or units need access, we will tell you in advance so it can be arranged.
Is Runcton in your area?
Yes. Sites across Runcton are covered, with one number for every area we cover.
How long does a job like this take?
It depends on the scope, though a typical visit typically takes one or more days per building, depending on the joint lengths and the access. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.
Looking after buildings in and around Runcton
With the shore within about 3 miles, Runcton counts as a coastal location. Sea-facing elevations take driven rain and salt, and their mastic shows it before the sheltered sides do. Runcton is in the South East, one of the UK’s drier regions. External mastic still waits for dry faces and the right temperature, and the sunniest, most exposed sides of a building typically need attention first.
Older community buildings, The Parish Church of St Stephen among them, often have frames of mixed ages whose mastic varies. Landlords with units on estates such as Quarry Lane Industrial Estate, 1.2 miles to the north-west of Runcton, can bring frame, door and external mastic across several units into one programme.
Runcton is about 2 miles south-east of Chichester, in West Sussex. We send applicators to Runcton for mastic joints. Across West Sussex, 373 places are covered, including Runcton. We also cover Portsmouth, some 14 miles away.
Business premises anywhere in PO20 are within our area. For a building on Goodwood Gardens, Brookside and Lagness Road or nearby, we can quote for mastic joints. Close to Runcton, our area also takes in North Mundham (1 mile west), Merston (1 mile north-east), Lagness (1 mile south-east), Hunston (1 mile west) and Portfield (2 miles north). Nearby towns on our patch include Worthing (15 miles east), Bognor Regis (3 miles south-east), Selsey (6 miles south), Littlehampton (9 miles east), Rustington (10 miles east) and Storrington (15 miles north-east).
What’s near Runcton
In Runcton, that means premises near Chichester High School For Girls and the streets around them. For rail, the closest station is Chichester station, about 1.9 miles north-west of the centre. Nearby you’ll also find Chichester Castle (2.1 miles north-west) and The Chichester City Museum (2 miles north-west).
Doing it in-house
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Work for main contractors and building owners
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. We are fully insured, and our insurance certificate can go with the quote.
Places near Runcton
Also in Runcton
From enquiry to sign-off
We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. Smaller jobs around Runcton can be grouped with others nearby. A fixed quote is given before anything starts.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
Before we start on site
- Point out parking and an unloading spot
- Clear stock, furniture or equipment away from the joints
- For older buildings, check the asbestos register before work
Getting a fixed quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Advice
What we can’t put right
Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Substrate edges that need repairing first
- Misted or failed double-glazed units
If you are not sure, just call 01277 525 020 or send photos by email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Communal entrances and stairwells
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Balcony and threshold joints
- External wall and movement joints
- Communal kitchens and washrooms
Maintenance after handover
Sealant joints are maintenance items, and how long they last depends on how they’re treated. We suggest:
- Share your contractor requirements early
- Check the asbestos register before any old mastic is disturbed
- Include mastic in your cyclical inspections
- Track which buildings were done and when
Where a paintable product was specified, it can be painted after curing. Non-paintable silicone shouldn’t be painted over unless told otherwise.
Left open, joint edges in render, brick or frames can deteriorate. Once that happens, repairs come before resealing and the job grows.
Signs you need mastic sealing in Runcton
UV and rain age external sealant. The surface chalks, the body stiffens and cracks appear, especially on south and west faces.
Most enquiries start with something like this:
- Worn sealant at communal door frames
- Leaks at window and door perimeters
- Occupiers reporting cold air round windows
- Window mastic that has split and shrunk
Student accommodation around universities such as University of Chichester (1.3 miles east of Runcton) is normally managed block by block, which suits a planned mastic programme.
Questions to ask before you book
- How joint depth will be controlled
- Do they follow the manufacturer’s priming guidance?
- Their public liability cover
- What the guarantee covers, and for how long