Construction and new-build mastic in Gravesend, Kent
We carry out mastic packages for new-build and refurbishment projects in Gravesend and the surrounding area. Send photographs or drawings for a fixed quote.
- New external sealant already peeling away
- Mastic snags holding up handover
- Sanitary sealant damaged by following trades
Construction mastic for Gravesend sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
After the work
To get the most from the new sealant:
- Record the products used in the O&M file
- Don’t schedule sealing before decorators and flooring are done
- Ask installers to correct oversized gaps first
- Allow flexibility for external sealing in damp or cold weather
Our 12-month guarantee covers the workmanship from sign-off. The guarantee covers how we sealed, not later damage by other trades, so protecting sealed areas matters.
One unsealed frame can let water into finished internal areas. That normally means redoing finishes in a completed area, and a delay to handover. Checking perimeters before internal finishes go on avoids it.
Construction mastic in Gravesend
Mastic follows everyone else, which means it absorbs every delay upstream. The sequence is set with the site team and updated as plots or floors are handed over, so applicators arrive when areas are genuinely ready. Sealing too early only means coming back once others have damaged it. We work on window and door perimeters, sanitary and kitchen joints and brick and block movement joints, and the usual reasons a site gets in touch are different trades sealing to different standards and sealant knocked or painted over by other trades. Facilities teams, main contractors and managing agents in Gravesend tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
For contractors on site in a town like Gravesend, the mastic has to fit the programme: sealing as scaffold comes down or as each floor is decorated, and snagging before handover. Tell us the programme and we’ll quote to it.
Every job we finish is backed by a 12-month workmanship guarantee, in Gravesend as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Gravesend (DA12, DA11)
- Wider area
- Kent
- Guarantee
- 12 months on our workmanship
- Quote
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Your questions answered
Would you work within a site like Gravesham Community Hospital?
Yes, healthcare and care buildings are part of our work. Each area is agreed with the ward or department and the estates team in advance.
Can being near the sea in Gravesend 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.
Is Gravesend in your area?
Yes. Sites across Gravesend are covered, with one number for every area we cover.
Do you use the sealant named in the specification?
We follow the specified sealant, and we will raise it if something in it doesn’t suit the joint. Specifications often reference BS EN 15651 or BS 6213.
Can you work while the building is occupied?
In most cases, yes. We phase the work so most of the building stays in use.
What site paperwork can you supply?
Each site asks for different documents, so tell us what you need and we’ll confirm it when we quote.
Are you CHAS accredited?
We are CHAS accredited and a Constructionline member, and each applicator is CSCS-carded. We are fully insured for public liability.
Construction mastic around Gravesend: what changes locally
The sea is no more than about 2 miles from Gravesend. Coastal exposure means perimeter and cladding joints work harder than on an inland job, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Gravesend lies roughly 21 miles out from central London. Towns within reach of London tend to keep building, from flats to offices and schools, so mastic packages have to keep pace with busy programmes.
Work at a hotel such as The Royal Clarendon Hotel (1 mile north of Gravesend) tends to be programmed around bookings, mastic included. Further education sites such as North West Kent College, 0.7 miles to the east of Gravesend, are extended and refurbished from time to time, with mastic often programmed into the summer break.
Gravesend is about 9 miles north-west of Gillingham, in Kent. Across the DA12 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Our Kent coverage takes in 931 places, from busy centres to rural villages. For work in that direction, see our London page.
We take on mastic packages across the DA12 and DA11 postcode area, for business premises of every kind. Buildings on Christ Church Road, Hillside Drive and Laurel Avenue are within our area. With the A2 and A226 nearby, Gravesend is easy to get to with materials and equipment. Sites close to Gravesend are covered too, including Windmill Hill (1 mile north-west), Milton-next-Gravesend (1 mile north-east), Denton (1 mile east), Singlewell or Ifield (1 mile south) and Northfleet (1 mile west). Bigger towns within reach include Maidstone (13 miles south-east), Dartford (7 miles west), Sevenoaks (13 miles south-west), Swanley (9 miles west), Kings Hill (11 miles south) and Foley Park (12 miles south-east).
Near you in Gravesend
We work on buildings around Northfleet Urban Country Park, St John's Catholic Comprehensive and St John's Catholic Comprehensive, among other places. The nearest railway station is Gravesend station, roughly 0.9 miles north-west. Well-known places in the area include Gravesham Museum (0.9 miles north-west) and Stone Castle (4.5 miles west). Not far away are Sawyers Lake and Gad's Hill.
Our process
Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. On site, the work usually takes whatever the programme allows, since the work follows the trades as areas are released, and our waste is bagged and taken away as we go. If you have more than one building in Gravesend, they can often be done on the same visit. Tell us when the building is open and we will plan to suit.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- We seal plot by plot or floor by floor in line with the programme.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Preparing the site
- Tell us what induction or permit system the site runs
- Send asbestos survey details if the building is pre-2000
- Explain the parking and delivery arrangements
Get a fixed quote
The quickest route to a quote is a few photos and the site postcode. Upload them with the quote form, or speak to us on 01277 525 020 or send photos by email to discuss it first.
Advice
Do you need construction mastic in Gravesend?
Three-sided adhesion is a frequent fault on new work. Fixed to three faces, the sealant rips the first time the joint opens so we set the depth properly before sealing.
It’s worth sending us details if you spot any of the following:
- Cracks opening in caulked internal joints
- A mastic package split between trades with no clear owner
- Bath and shower joints scraped during the final clean
- Frame gaps too wide for sealant alone
For a contractor working at a hospital such as Gravesham Community Hospital, 1.1 miles to the north-west of Gravesend, perimeter and facade sealing is planned around patients and deliveries.
What to look for in a quote
- Health and safety accreditation such as CHAS
- How joint depth will be controlled
- Will failed sealant be removed rather than covered?
- Will CSCS-carded applicators be on site?
Site staff or a sealant specialist?
Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.
What sets the cost
Quotes vary with the job. Expect it to depend on:
- How much there is to seal
- Removal of failed or old sealant
- Whether the work must be split into stages
- The site’s rules and procedures
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.
Before you send an enquiry
A good diagnosis starts with the right details. Tell us:
- The type of building and who uses it
- How the joints are reached, and at what height
- The product your specification calls for
- Drawings or a marked-up plan, if available
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, call the office on 01277 525 020 or email a schedule or drawings.
Different surfaces, different methods
Internal decorators’ caulk
Caulking is often done in a hurry by whoever’s on site. A neat, consistent caulk line makes the decorators’ job quicker and reduces snags.
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. A kitchen-suitable sealant is used, food-safe where food contact is possible.