Construction and new-build mastic in Cobham, Kent
Sealant work in Cobham for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, quoted at a fixed price.
- Old sealant on a refurbishment that needs stripping before new work
- Internal caulk splitting as the building dries out
- Bath and shower joints scraped during the final clean
Construction mastic for Cobham sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Questions about Cobham
Can you take on a job at a hospital such as Gravesham Community Hospital?
Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Is Cobham off your patch?
Not at all. Cobham is within our area. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.
Can you work while the building is occupied?
Yes, as long as we plan it. Tell us your site hours and access windows and we will plan around them.
Do you do fire-rated sealing on new builds?
Fire-rated sealing at service penetrations and linear gaps can be included where specified. Record requirements are confirmed at quote stage.
How long do sealant joints last?
There isn’t a single answer, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.
Do you guarantee new-build sealant work?
It carries a 12-month guarantee on our workmanship. We’re also fully insured for public liability.
How long before the joints can be used?
Curing time varies by product, and we confirm it on the day.
Construction mastic in Cobham, done properly
We work to the specification and the programme. Where the specification names a product, we use it; any alternative we suggest is put to you before anything changes. Joint widths, backing, primers and tooling follow the manufacturer’s guidance, so the joints perform as the designer intended. If you’re dealing with frame gaps too wide for sealant alone and mastic snags holding up handover, we can put it right, on cladding and panel joints, brick and block movement joints and sanitary and kitchen joints alike. For commercial sealant work in Cobham, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.
Conversions of older rural buildings near smaller places such as Cobham bring stone, flint, brick and timber up against new glazing. A product that grips an irregular face, with a colour that suits the building’s character, is typically what’s needed.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we’re clear about what is covered before work starts.
- Where
- Cobham (DA12)
- Wider area
- Kent
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Updated
- 3 November 2026
Honest limits
Before quoting, we check that sealant is the right answer. It won’t put right:
- Joints damaged after sign-off by following trades
- Joint design decisions that belong to the architect or engineer
- Frame gaps too wide for sealant, which the installer needs to correct
Not sure which it is? You can speak to us on 01277 525 020 or send details through our quote form and we will tell you honestly.
Where we work in Cobham
- Cladding and panel joints
- Brick and block movement joints
- Sanitary and kitchen joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Window and door perimeters
When to call us in Cobham
A new building moves while it dries and settles. Plaster, screeds, timber and blockwork all shrink as they lose moisture and internal caulk in a moving joint is usually the first to crack. Choosing the right product for each joint reduces that.
Most enquiries start with something like this:
- Old sealant on a refurbishment that needs stripping before new work
- Missed perimeter joints on a new elevation
- Different trades sealing to different standards
- Cracks opening in caulked internal joints
On a campus such as University for the Creative Arts - Rochester, 4.9 miles to the east of Cobham, new teaching buildings and residences are normally built and refurbished around the academic year.
What your quote should include
- Can the work be phased to keep areas open?
- Health and safety accreditation such as CHAS
- How the existing material will be dealt with
- How joint depth will be controlled
Towns and villages near Cobham
More services for Cobham
For managing agents and facilities managers
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.
Doing it in-house
Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.
Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Diagnose, treat, sign off
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, primer goes on where the manufacturer specifies it, and each bead is tooled to a neat concave finish. If others near Cobham need work, visits can be combined. A fixed quote is given before anything starts.
- First we look at the scope on site or from drawings.
- A fixed quote sets out scope, products and phasing.
- Paperwork is agreed and applicators are inducted on site.
- Sealing follows the programme as areas are released.
- Problems we find, such as oversized gaps, are raised right away.
- Final snagging is completed and the 12-month guarantee applies.
What we need from you
- Explain the parking and delivery arrangements
- Send any specification or drawings in advance
- Share your working hours and any access restrictions
Request a quote
Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings you can plan around. For a chat about it beforehand, ring 01277 525 020 or email the details over.
Advice
Construction mastic in Cobham: the local picture
Central London is about 23 miles from Cobham. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, so mastic packages have to keep pace with busy programmes. Cobham sits in one of the drier corners of the country, the South East. Winter mornings still bring frost and condensation on frames and panels, so we time external mastic for dry faces and agree it with the site team.
For contractors at a college like North Kent College Gravesend Campus, 3 miles north of Cobham, perimeters and internal sealant are timed for the holidays. Projects at schools like Cobham Primary School work to term dates, so mastic is programmed tightly.
Cobham is about 3 miles south of Gravesend, in Kent. Any commercial site in Cobham is covered, for single jobs and planned programmes alike. 931 places across Kent fall within our area, including Cobham. Our London page has more on work in that area, about 23 miles away.
If you need construction mastic in DA12, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are The Street, Lawrence Drive and Cobhambury Road. Close to Cobham, our area also takes in Upper Bush (2 miles south-east), Lower Bush (2 miles south-east), Cuxton (2 miles south-east), North Halling (3 miles south-east) and Upper Halling (3 miles south). A short drive away, we cover Maidstone (10 miles south-east), Sittingbourne (15 miles east), Dartford (8 miles north-west), Sevenoaks (12 miles south-west), Gravesend (3 miles north) and Tonbridge (14 miles south).
Around Cobham
Locally, jobs take us to sites close to Thamesview School, The Ship Inn and Jeskyns and the streets around them. For rail, the closest station is Sole Street station, roughly 1.2 miles south-west. Other landmarks nearby include Rochester Castle (4.3 miles east) and Gravesham Community Hospital (3.9 miles north-west). Open spaces near Cobham include Gad's Hill and Ranscombe Farm.
After the work
Keep the joints in good shape with a few simple steps:
- Ask installers to correct oversized gaps first
- Bring the mastic contractor in after the last trades are through
- Use the product the specification names
- Keep product details for future maintenance
At handover, keep the product details with the O&M information. That helps the building owner maintain the joints later. We can confirm the handover information you need when we quote.
Sanitary joints that fail early become defects soon after occupation. Water gets behind trays, vanity tops and panels, and the repair falls into the defects period. Getting the product and preparation right first time avoids that.