Mastic sealing for building owners and managing agents in Capstone, Medway
Mastic sealing for building owners, managing agents and housing associations in Capstone. CHAS accredited and fully insured, with a 12-month guarantee.
- Damaged joints in communal entrances and corridors
- Repeated reactive repairs to the same buildings
- Open joints in brickwork or panels
Need mastic sealing in Capstone?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How we handle mastic sealing in Capstone
Owners and agents usually inherit a building’s mastic rather than choose it, and it ages quietly: window perimeters, door frames, external joints and communal junctions all rely on it. Once it cracks, hardens or comes away, draughts and water find a way in, and occupiers start reporting it. Most enquiries involve failed external movement joints and draughts at frames across a block, on window and door perimeters on blocks, balcony and threshold joints and communal kitchens and washrooms. A specialist sealant contractor works differently from a general builder: on jobs in Capstone, preparation and product choice get the time they need.
For buildings around smaller places like Capstone, we group work so one trip covers it. Send photographs of the frames and joints and we will give a fixed quote.
A 12-month guarantee applies to all our work in Medway. If an installation problem shows up, ring 01277 525 020 or email the details over and we’ll arrange a return visit.
- Place
- Capstone (ME7)
- Wider area
- Medway
- Cover
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What sets the cost
Before we quote, we look at:
- Whether old sealant has to be cut out first
- Working within restricted access windows
- Which sealant the job calls for
- Location, for remote and island sites
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we’ll put a fixed figure on it.
Before you send an enquiry
A good diagnosis starts with the right details. Tell us:
- Rough lengths or quantities, or drawings if you have them
- Whether the building will be occupied during the work
- The site address and postcode
- Your programme or deadline
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 send details through our quote form with what you know.
When to call us in Capstone
Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified it comes away from one face.
Most enquiries start with something like this:
- Occupiers reporting cold air round windows
- Brittle perimeter mastic across a building
- Open joints in brickwork or panels
- Repeated reactive repairs to the same buildings
Landlords with units on estates such as Gillingham Business Park (0.8 miles north-east of Capstone) can bring frame, door and external mastic across several units into one programme.
What to look for in a quote
- Which product they’ll use, and why it suits the joint
- Who will actually carry out the work
- How they handle RAMS and site documents
- How joint depth will be controlled
For owners and agents in Capstone
With the shore within about 3 miles, Capstone counts as a coastal location. For owners and agents with buildings near the sea, exposed elevations are where frame mastic fails first, so it’s worth inspecting those sides more often. Capstone is in the South East, one of the UK’s drier regions. Even so, frame mastic only goes on in dry, workable conditions, and the sunniest, most exposed sides of a building usually need attention first.
Churches, halls and community buildings such as All Saints Church are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. If your remit includes a building such as Hempstead Infant School, frame and door mastic can be programmed for the holidays.
Capstone is about 1 mile south-west of Gillingham, in Medway. Capstone sits inside our coverage and the rest of Medway, with the same fixed quotes and 12-month guarantee as everywhere else. Across Medway, 54 places are covered, Capstone among them. There’s a separate page for London, about 30 miles away.
We cover the ME7 postcode districts. Nearby places we also cover include Darland (1 mile north), Hale (1 mile north-west), Hempstead (1 mile south-east), Gillingham (1 mile north-east) and Chatham (1 mile west). Further afield, our area takes in Rochester (4 miles north-west), Strood (4 miles north-west), Hoo St Werburgh (5 miles north), Rochester Riverside (3 miles north-west), Brompton (3 miles north-west) and Frindsbury (4 miles north-west).
Around Capstone
In Capstone, that means premises near Chatham Grammar School for Girls, The Star pub and The Robert Napier School, among other places. The nearest railway station is Gillingham (Kent) station, about 2 miles north of the centre. A little further out are Medway Maritime Hospital (1.7 miles north-west) and Pentagon Shopping Centre (2.3 miles north-west). The countryside around Capstone includes Burham Down and Blue Bell Hill.
On site: what to expect
We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. For a building around Capstone, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.
- A building-by-building inspection lists the failed joints.
- 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.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
Preparing the site
- Explain the parking and delivery arrangements
- Share your working hours and any access restrictions
- Move anything stored against the joints
Get a fixed quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to speak to us on 01277 525 020 or email a schedule or drawings.
Advice
Other services in Capstone
When it isn’t the sealant
Honesty saves time and money. Fresh joints won’t solve:
- Leaks through the frame itself rather than the perimeter
- Broken glass or failed sealed units
- Water coming in from the roof or rainwater goods
If in doubt, give us a call on 01277 525 020 or email the details over and we’ll say what we think before you book.
Surfaces we seal
- Shopfronts below residential blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- External wall and movement joints
Common questions from Capstone clients
Does a coastal location like Capstone affect which sealant is used?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.
Is Gillingham Business Park, near Capstone, within your area?
Yes, sites like Gillingham Business Park are within our area, along with the rest of Capstone. A few photos and the unit address let us price the work.
How do you handle work on occupied blocks?
Occupiers stay in the building throughout. We flag any areas that need internal access well before the dates so you can arrange it with occupiers.
How long will the new sealant last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
Do you work to architects’ specifications?
Yes. Include it with the drawings when you ask for a quote, and we will price the work to it, flagging anything that needs clarifying.
Do you work with property factors and landlords?
Yes. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
Can you send RAMS and CSCS details before starting?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member.
After the work
Problems stay small when the joints are checked regularly. Specifically:
- Keep bins and bikes away from communal door frames
- Make mastic part of routine maintenance checks
- Ask residents or tenants to report leaks and draughts early
- List the paperwork your organisation requires when you send details
Our workmanship is covered for 12 months, so report any failure in that time. After that, regular inspection keeps the programme on track.
Joints on a building age together, so it pays to look at the whole elevation. A planned reseal saves repeated visits.
What happens if it’s left?
Replacing mastic before water gets in is a planned job. After water has got in, there may be damp, damaged plaster or decoration to put right too, and the complaints come with it. Older rural buildings around Capstone move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.
No two sites price the same: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Why us?
- Fully insured, including public liability cover
- Work carried out by CSCS-carded applicators
- 12 months’ guarantee on every job
- Constructionline member
Take a look at what affects the cost and how we’re accredited.