Mastic contractors in Capstone
Commercial sealant work in Capstone for contractors, FMs and building owners: mastic packages for new-build and refurbishment projects, with a fixed quote first.
- Failed sealant in an existing building being refurbished
- Early adhesion failures on new external joints
- Missed perimeter joints on a new elevation
Construction mastic for businesses in Capstone
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
When it isn’t the sealant
Some faults sit outside our scope, and we point that out rather than sealing over them:
- Approving fire stopping as compliant
- Faulty frames rather than failed sealant
- Oversized gaps that need packing or adjustment by others
If in doubt, speak to us on 01277 525 020 or send details through our quote form and we’ll say what we think.
Where we work in Capstone
- Floor and skirting junctions
- Brick and block movement joints
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Window and door perimeters
- Cladding and panel joints
About our construction mastic in Capstone
A typical mastic package covers more than window perimeters: frame perimeters inside and out, caulking to trims and boards where the specification calls for it, sanitary silicone, kitchens, and the final snag list. Splitting those between trades often leaves gaps in responsibility, and one applicator team gives a consistent finish. Most enquiries involve perimeter gaps outside the sealant’s range and early adhesion failures on new external joints, on internal decorators’ caulk, cladding and panel joints and floor and skirting junctions. Searching for sealant specialists in Capstone? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Construction in and around smaller places such as Capstone 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.
Building owners and contractors get the same cover: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Place
- Capstone (ME7)
- Wider area
- Medway
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Building owners, agents and FMs in Capstone
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, and each stage is agreed with your contact.
For main contractors, we work as the sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.
Questions we’re asked in Capstone
Can being near the sea in Capstone affect the sealant we need?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We check the specified product suits the exposure and pay close attention to preparation.
Could you schedule work at a campus like University for the Creative Arts - Rochester for the vacation?
Yes. Education sites typically want the work in vacations or in phases during term, and we plan to suit. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Can fire-rated sealing at service penetrations be included?
Fire-rated sealant can be included where it’s specified, installed to the product’s tested detail. The design and sign-off belong to the designer, fire engineer or building control.
What’s the quickest route to a quote?
The quote form is the simplest route, though you can also phone 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.
Do you need to see the site first?
Many jobs can be quoted from photographs, drawings or a joint schedule. If the job needs a look first, we’ll arrange a visit before quoting.
What guarantee comes with a mastic package?
The work is guaranteed for 12 months, covering how we sealed. Keeping other trades off finished joints prevents most problems.
What site paperwork can you supply?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.
Should maintenance staff do it?
Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.
Redoing a failed joint normally costs more than getting it right at the outset, 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.
Building and refurbishing in Capstone
With the shore within about 3 miles, Capstone counts as a coastal location. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, so we check the specified product suits the exposure before the first bead. Central London is about 30 miles from Capstone. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, which keeps mastic packages in demand.
New units and refits on sites such as Gillingham Business Park, 0.8 miles to the north-east of Capstone, need their panel and perimeter joints sealed to the specification. When a school such as Hempstead Infant School is extended or refurbished, the mastic package is often squeezed into the holidays.
Capstone is about 1 mile south-west of Gillingham, in Medway. We cover Capstone, with the same fixed quotes and 12-month guarantee as everywhere else. Capstone is one of 54 places we cover in Medway for mastic packages. There’s a separate page for London, roughly 30 miles from Capstone.
If you need construction mastic in ME7, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. If your building is just outside Capstone, we cover Darland (1 mile north), Hale (1 mile north-west), Hempstead (1 mile south-east), Gillingham (1 mile north-east) and Chatham (1 mile west). Nearby towns on our patch include 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).
Local landmarks in Capstone
We work on buildings around Chatham Grammar School for Girls, The Star pub and The Robert Napier School and the streets around them. For rail, the closest station is Gillingham (Kent) station, roughly 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). For a walk, there’s Burham Down and Blue Bell Hill.
What the job involves on each surface
Internal decorators’ caulk
Where the specification calls for it, acrylic decorators’ caulk goes on non-moving internal gaps before painting. It’s paintable and suits gaps that don’t move.
Window and door perimeters
Inside, a paintable sealant or decorators’ caulk is used where the joint doesn’t move much. We follow what’s specified, and colour-matched products can be used where the frame is on show.
Diagnose, treat, sign off
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed before we move to the next. If others near Capstone need work, visits can be combined. A fixed quote is given before anything starts.
- First we take quantities off the drawings and read through the specification.
- We return a fixed quote that ties the mastic package to your programme.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Every joint is prepared, set to depth and sealed with the specified product.
- Snags are cleared before handover and completed areas carry our 12-month guarantee.
What we need from you
- Let us know about inductions and permits
- Let building users know which areas are affected
- Make sure the joints can be reached
Getting a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.
Related advice
Other services in Capstone
Common problems we fix in Capstone
On a live site, contamination is the biggest threat to a new joint. Plaster dust, release agents, protective film residue and damp all stop sealant bonding so faces get cleaned, and primer goes on wherever the maker specifies, even on new work.
It’s worth sending us details if you spot any of the following:
- Sealant knocked or painted over by other trades
- Window and door perimeters that won’t pass inspection
- A mastic package split between trades with no clear owner
- Oversized or tapered gaps around new frames
University estates such as University for the Creative Arts - Rochester, 2.5 miles north-west of Capstone, tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal.
Questions to ask before you book
- How long is the guarantee, and what does it include?
- Who will actually carry out the work
- Whether old or failed sealant will be cut out, not overlaid
- Do they follow the manufacturer’s priming guidance?