Mastic sealing for building owners and managing agents in Sittingbourne, Kent
Mastic sealing in Sittingbourne, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Old repairs sealed over failed mastic
- Brittle perimeter mastic across a building
- Draught complaints from residents or tenants
Mastic sealing for Sittingbourne sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
How we handle mastic sealing in Sittingbourne
Blocks are lived in, so access and disruption have to be thought through. Dates, areas and the order of work are agreed with you in advance so you can let residents know what is happening. Entrances and stairwells are kept in use throughout. If you’re dealing with window mastic that has split and shrunk and damaged joints in communal entrances and corridors, we can put it right, whatever the surface. For commercial sealant work in Sittingbourne, you deal with one contact from quote to sign-off, whether it’s one building or several.
In Sittingbourne, as in most towns, a block may have frames from several eras, so mastic around them can be of mixed age and quality. A look at the whole building shows which joints need doing now.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Where
- Sittingbourne (ME10, ME9)
- Wider area
- Kent
- Guarantee
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
For managing agents and facilities managers
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Sites in Sittingbourne can sit alongside others in a wider programme across Kent.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
Questions about Sittingbourne
Does the sea air around Sittingbourne change the choice of sealant?
It can. Coastal exposure works external joints harder than inland weather. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.
Do you cover business parks and estates near Sittingbourne, such as Kent Science Park?
Yes, sites like Kent Science Park are within our area, along with the rest of Sittingbourne. Photos and a short description are enough for a first look.
What will the job cost?
It depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we’ll price it properly.
Do you seal on top of existing sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
Do you check for asbestos in old sealant?
Asbestos removal isn’t part of our work. If old sealant is suspected, work stops until it’s tested in line with the dutyholder’s asbestos management.
Can you follow the specification on our project?
Yes. We follow the specification, along with the manufacturer’s installation guidance.
Do you work for managing agents and housing associations?
Yes, block and estate work is a core part of what we do. We work through buildings in a planned order so you can plan around it.
Common problems we fix in Sittingbourne
Sunlight and weather break mastic down over time. It stiffens, stops stretching and cracks most of all on the sunniest and most exposed elevations.
If one of these sounds familiar, it’s time for a closer look:
- Cracked, hardened mastic round windows on a block
- Water getting in round frames after rain
- Complaints coming in block by block
- Estate-wide sealant that is simply worn out
Churches, halls and community buildings such as Church of the Holy Trinity are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.
Before you book anyone
- Proof of insurance
- How the joint faces will be prepared and primed
- How the existing material will be dealt with
- The terms of the workmanship guarantee
Site staff or a sealant specialist?
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Places near Sittingbourne
Also in Sittingbourne
Block-wide mastic in Sittingbourne
Sittingbourne sits close to the coast, within about 2 miles. On buildings near the shore, the side facing the weather typically needs its mastic renewed first, and they deserve more regular inspection. Sittingbourne sits in one of the drier corners of the country, the South East. 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.
Buildings close to stations like Sittingbourne station (to the south of Sittingbourne) are often flats over shops, with frame mastic to keep sound. Site managers at schools like Borden Grammar School can fit frame mastic into the summer works.
Sittingbourne is about 37 miles east of London, in Kent. Looking for mastic sealing in Sittingbourne? We can help. Sittingbourne is one of 931 places we cover in Kent for mastic joints. Our London page has more on work in that area.
Work on mastic joints is covered throughout ME10 and ME9, for business premises of every kind. We cover commercial and managed buildings on High Street, Roman Square and Moonstone Square and the roads nearby. Being close to the A2 and A249, Sittingbourne is easy to get to with materials and equipment. If your building is just outside Sittingbourne, we cover Murston (1 mile east), Milton Regis (1 mile north-east), Kemsley (1 mile north), Howt Green (1 mile north-west) and Heart's Delight (1 mile south-west). A short drive away, we cover Maidstone (10 miles south-west), Ashford (15 miles south), Whitstable (13 miles east), Faversham (7 miles east), Minster (6 miles north-east) and Kings Hill (15 miles west). Sittingbourne is one of the busier places in Kent, and we take on mastic joints for its commercial and public buildings.
What’s near Sittingbourne
In Sittingbourne, that means premises near Milton Court Primary Academy, The Golden Hope pub and Milton Creek Country Park. Sittingbourne has its own railway station: Sittingbourne station. Well-known places in the area include Bayford Court (under half a mile east) and Court Hall Museum (under half a mile north).
On site: what to expect
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. Parking and loading for town-centre jobs in Sittingbourne are worth mentioning when you send details. Industrial and business units typically have yard or car park space.
- First we look at the mastic on each building and note what needs replacing.
- You get a fixed quote, priced per building where that helps your budgeting.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- We remove the old mastic completely and clean the joint faces back.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
Preparing the site
- Let building users know which areas are affected
- Share your working hours and any access restrictions
- Tell us what induction or permit system the site runs
Request a quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to speak to us on 01277 525 020 or email a schedule or drawings with what you know.
Related advice
When it isn’t the sealant
Part of a good diagnosis is knowing where sealant stops. You’ll hear from us if the cause turns out to be any of the following:
- Masonry that has broken away beside the joint
- Broken glass or failed sealed units
- Leaks from above rather than through a joint
Not sure which it is? You can phone 01277 525 020 or send photos by email and we will tell you honestly.
Where we work in Sittingbourne
- External wall and movement joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Communal entrances and stairwells
- Balcony and threshold joints
- Communal kitchens and washrooms
Maintenance after handover
Your facilities or cleaning team can help the joints last. Share these points with them:
- Reduce knocks to communal area joints
- Have the asbestos survey to hand for older buildings
- Avoid piecemeal callouts where you can
- Track which buildings were done and when
Keep bins, bikes and deliveries away from low-level joints where you can. Knocks cause many early failures in communal areas.
Failed mastic often goes unnoticed until heavy rain finds it. Acting at the first signs keeps it a straightforward reseal and the complaints that come with it.