Construction and new-build mastic in Borden, Kent
Mastic packages for new-build and refurbishment projects in Borden and across Kent. CHAS accredited and fully insured, with a 12-month guarantee.
- Failed sealant in an existing building being refurbished
- External joints sealed in damp or cold conditions that are now failing
- Window and door perimeters that won’t pass inspection
Construction mastic for businesses in Borden
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
General trades versus a specialist
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
Construction mastic in Borden, done properly
Refurbishment work needs a slightly different approach from new build. Old beads come out completely, as fresh silicone can’t grip old. New and existing joints then get the same preparation. If you have new external sealant already peeling away and missed perimeter joints on a new elevation, we can put it right. Facilities teams, main contractors and managing agents in Borden tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
In the countryside around places like Borden, conversion schemes put new frames into old stone, flint, brick or timber. Those joints need a sealant that suits an uneven, sometimes porous surface, and often a colour chosen for the building.
We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant.
- Place
- Borden (ME9)
- Region
- Kent
- Guarantee
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
How the job changes by surface
External facade and movement joints
External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it, and seal only with a dry joint inside the product’s temperature range.
Window and door perimeters
Perimeter joints between frames and the structure are the weather line on any new building. They’re sealed with a low-modulus neutral-cure silicone or another product named in the specification and set the depth with backing where needed.
Common problems we fix in Borden
Most mastic snags on new buildings come from sequencing rather than product. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage, and the joint has to be redone.
Things that typically lead to an enquiry:
- Window and door perimeters that won’t pass inspection
- Old sealant on a refurbishment that needs stripping before new work
- New external sealant already peeling away
- Caulk cracking where joints are moving more than expected
For contractors at a college like Sittingbourne College (0.5 miles east of Borden), perimeters and internal sealant are timed for the holidays.
Questions to ask before you book
- Is the sealant right for the movement and the substrate?
- How long is the guarantee, and what does it include?
- Their pre-qualification and accreditations
- How they handle RAMS and site documents
Looking after the joints
Once the work is signed off, these steps help:
- Brief following trades on areas that have been sealed
- Release areas for mastic once other trades have finished in them
- Put any product change through the designer first
- Flag uneven or tapered frame gaps early
After we have sealed an area, it helps to keep other trades from damaging the joints. Fresh sealant needs its cure time before it’s cleaned, painted near or knocked; we confirm the time for each product.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Sealant stretched over an oversized gap won’t last. We flag them as soon as we see them.
Construction mastic in Borden: the local picture
Central London is about 36 miles from Borden. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and each scheme needs its mastic sealed to programme. Borden has several hotels close by, all within 2 miles. Hotel extensions and refits normally have to fit around bookings, so mastic dates are tight.
On a healthcare site such as Sittingbourne Memorial Hospital, which lies east of Borden, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. Units on estates such as Kent Science Park (1.6 miles south-east of Borden) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Borden is about 1 mile south-west of Sittingbourne, in Kent. We cover commercial sites throughout Borden. Across Kent, 931 places are covered, including Borden. For work in that direction, see our London page.
Postcode districts covered here: ME9 for mastic packages. We cover commercial and managed buildings on The Street, Mountview and Homestead View. Nearby places we also cover include Heart's Delight (1 mile south-east), Tunstall (1 mile south-east), Sittingbourne (1 mile north-east), Highsted (2 miles south-east) and Rodmersham Green (2 miles south-east). A short drive away, we cover Maidstone (9 miles south-west), Ashford (15 miles south-east), Whitstable (14 miles east), Faversham (8 miles east), Minster (7 miles north-east) and Kings Hill (14 miles west).
Around Borden
Recent enquiries here include premises near Westlands School and Cromers Wood, among other places. Borden’s nearest station is Sittingbourne station, roughly 1.4 miles north-east. Other landmarks nearby include Court Hall Museum (1.6 miles north-east) and Bayford Court (1.7 miles north-east).
Places near Borden
Other services in Borden
How a job runs
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. 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 Borden, tell us how to find it and who will meet us. Send that with the details and we will confirm the plan with the quote.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- The sequence is agreed with the site manager.
- Each area is sealed when it’s released.
- Every joint is cleaned, set to depth and sealed with the specified product.
- After snagging, the work is handed over under our 12-month guarantee.
Getting the site ready
- Warn occupants and staff about the work
- Point out parking and an unloading spot
- Tell us which areas need to stay in use
Get a fixed quote
A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or ring 01277 525 020 or send photos by email to discuss it first.
Related advice
Commercial clients in Borden
Whether you are a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
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.
Your questions answered
Can you take on a job at a hospital such as Sittingbourne Memorial Hospital?
Yes, healthcare and care buildings are part of our work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Can work at a site such as Canterbury Christ Church University fit around teaching?
Yes. Education sites normally 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.
Do you offer coloured sealant?
In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We will confirm the colours available for the specified product.
Do you install fire-rated sealant as part of a package?
Fire-rated sealing at service penetrations and linear gaps can be included where specified. Tell us what records you need and we will confirm with the quote.
Do you work in Borden?
Yes. Borden is in our area and the rest of Kent. For a quote, give us a call on 01277 525 020 or email the details over.
Do you need to see the site first?
It depends on the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.
What joints do you seal on a new build?
External and internal frame perimeters, caulking where it’s specified, sanitary silicone, kitchen joints and snagging before handover. The scope follows your specification.