Construction and new-build mastic in Cold Harbour, Kent
Mastic packages for new-build and refurbishment projects throughout Cold Harbour and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Internal caulk splitting as the building dries out
- Sanitary sealant damaged by following trades
- External joints sealed in damp or cold conditions that are now failing
Construction mastic for businesses in Cold Harbour
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic in Cold Harbour, done properly
Site managers want applicators who turn up with the right cards and paperwork. Our applicators are CSCS-carded, and we’re CHAS accredited and a Constructionline member, and we are fully insured. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. If you have cracks opening in caulked internal joints and missed perimeter joints on a new elevation, we can help, whatever the surface. Most enquiries from Cold Harbour start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Around smaller places like Cold Harbour, building work typically means conversions of farm buildings, a few new houses or an extension to a hall or school. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Where
- Cold Harbour (ME17)
- Wider area
- Kent
- Cover
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Questions we’re asked in Cold Harbour
Can you keep pace with our programme in Cold Harbour?
Yes. Send the programme and drawings, and we’ll plan the mastic to suit the stages. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can you work around term dates at a campus such as Canterbury Christ Church University?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
Can fire-rated sealing at service penetrations be included?
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested details. Fire-stopping design and sign-off sit with the designer and building control.
Can you quote from photographs?
It depends on the job. Straightforward work can often be priced from photographs and measurements, while larger or less clear jobs get a site visit first.
Is any job too small?
We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.
How long does a job like this take?
The duration is planned around your programme and the access we are given. We will give you an estimate of time on site when we quote.
Can you handle several sites?
Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.
When it isn’t the sealant
Being straight saves everyone time. Fresh joints won’t solve:
- Joints damaged after sign-off by following trades
- Glazing units that are cracked or misted
- Specifying the product where the designer hasn’t
If you’re not sure, just speak to us on 01277 525 020 or use the quote form and we’ll give you a straight answer.
Joints and surfaces we work on
- Cladding and panel joints
- Floor and skirting junctions
- Window and door perimeters
- Brick and block movement joints
- Sanitary and kitchen joints
- Internal decorators’ caulk
Common problems we fix in Cold Harbour
Swapping the specified sealant for a cheaper general-purpose product is a common cause of failure. A general-purpose silicone on a facade or a caulk in a wet area won’t perform like the specified product. We use what’s specified, and any substitute goes to you for acceptance.
Clients normally get in touch after noticing something like this:
- A long mastic snag list close to completion
- Inconsistent sealant finishes from plot to plot
- Frame perimeters left unsealed or poorly sealed
- Old sealant on a refurbishment that needs stripping before new work
Historic houses such as Belmont House and Gardens, 3.8 miles north-east of Cold Harbour, are a reminder of the older buildings in the wider area, where sealing against old stone, brick or timber needs compatible products.
What your quote should include
- How long is the guarantee, and what does it include?
- Who will actually carry out the work
- Their plan for phasing and protecting the area
- How the existing material will be dealt with
Looking after the joints
Problems stay small when the joints are checked regularly. In particular:
- Keep finished joints away from paint, plaster and scrapers
- Get the mastic subcontractor involved early in the programme
- Keep scrapers and abrasive pads off new beads
- Note which sealant went where at handover
At handover, keep the product details with the O&M information. That helps the building owner maintain the joints later, and tells you what to reseal with. We can confirm the handover information you need when we quote.
Leaving the mastic snag list to the end squeezes everyone. Clearing snags area by area spreads the work out and keeps handover on track.
Quoting for work in Cold Harbour
To price the job, we consider:
- The size and state of each joint
- Specialist products, such as fire-rated or hygienic sealants
- Working within restricted access windows
- Access and working height
The price depends on how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.
Before you send an enquiry
It doesn’t need to be a full survey. A few details are enough to get going:
- The asbestos register, for older buildings
- What the building is and how it’s used
- Any specification or named product
- How the joints are reached, and at what height
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, phone 01277 525 020 or email a schedule or drawings.
Building and refurbishing in Cold Harbour
Central London is about 42 miles from Cold Harbour. 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. Cold Harbour 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.
On a campus such as Canterbury Christ Church University, which lies north-west of Cold Harbour, new teaching buildings and residences are normally built and refurbished around the academic year.
Cold Harbour is about 7 miles south-west of Faversham, in Kent. Commercial clients in Cold Harbour can call on us for mastic packages, as part of our coverage of Kent. Cold Harbour is one of 931 places we cover in Kent for mastic packages. There’s a separate page for London, roughly 42 miles from Cold Harbour.
Commercial sites across ME17 are covered for mastic packages. If your building is just outside Cold Harbour, we cover Warren Street (1 mile north-west), Payden Street (1 mile north-west), Lenham Heath (2 miles south-west), Charing Heath (2 miles south) and Lenham Forstal (2 miles south-west). Further afield, our area takes in Maidstone (11 miles west), Ashford (8 miles south-east), Canterbury (14 miles east), Sittingbourne (7 miles north), Whitstable (14 miles north-east) and Faversham (7 miles north-east).
Near you in Cold Harbour
Locally, jobs take us to sites close to The Harrow pub and Spuckles and Kennelling Woods and the streets around them. The nearest railway station is Charing station, about 2.3 miles south of the centre. A little further out are Newnham Castle (3.4 miles north).
On site: what to expect
Before we leave any area, 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. Rural sites near Cold Harbour may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- Drawings, specification and programme come to us.
- We take off quantities and return a fixed quote.
- We agree with the site team which areas come first.
- Plots or floors are sealed as they’re handed over.
- Every joint is cleaned, set to depth and sealed with the specified product.
- Snags are cleared and the package signed off with our 12-month guarantee.
Preparing the site
- Let us know about inductions and permits
- For older buildings, check the asbestos register before work
- Point out any areas we must not close
Quotes
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we’ll arrange a site visit if anything is unclear.
Advice
Should maintenance staff do it?
A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.