Mastic sealant contractors in New Barn
Mastic sealing for building owners, managing agents and housing associations in New Barn. CHAS accredited and fully insured, with a 12-month guarantee.
- Old repairs sealed over failed mastic
- Water getting in round frames after rain
- Movement joints with sealant missing
Need mastic sealing in New Barn?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Frames, entrances and external joints in New Barn
New Barn sits in one of the drier corners of the country, the South East. Outside work still depends on dry joints, and south- and west-facing elevations, which take the most sun and rain, often age first. At about 20 miles from central London, New Barn is within reach of the capital. Within reach of London, blocks run by agents and associations are common around stations, and window and balcony mastic on them tends to age at the same rate.
If you are responsible for a building such as Church of Saint Mary Magdalene, frame and door mastic needs the same attention as any other property. Blocks of flats and mixed-use buildings often cluster around stations such as Longfield station, 1.2 miles to the west of New Barn, and their window and balcony mastic tends to age at the same rate across a building. For a school such as Longfield Academy, perimeter mastic on windows and doors is a holiday job.
New Barn is about 3 miles south of Northfleet, in Kent. New Barn sits inside our coverage and the rest of Kent, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 931 places across Kent fall within our area, including New Barn. London is covered too, some 20 miles away.
We cover the DA3 and DA13 postcode districts. Among the streets we cover are The Maples, Kenwood Avenue and Merileys Close, and sites on any of them can send details for a fixed quote. Nearby places we also cover include Longfield Hill (1 mile south-east), Longfield (1 mile west), Hartley (1 mile south-west), Nash Street (1 mile east) and Meopham (2 miles south-east). A short drive away, we cover Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (10 miles south-west), Gravesend (3 miles north-east), Tonbridge (14 miles south) and Northfleet (3 miles north).
Near you in New Barn
In New Barn, that means premises near Istead Rise Primary School and Rectory Meadow, among other places. For rail, the closest station is Longfield station, about 1.2 miles west of the centre. Nearby you’ll also find Gravesham Museum (3.6 miles north-east) and Stone Castle (3.9 miles north-west). Open spaces near New Barn include Sawyers Lake.
About our mastic sealing in New Barn
For over 20 years we have resealed joints for owners, agents and landlords. Our applicators are CSCS-carded, and the work is backed by public liability insurance. Each building we complete carries a 12-month guarantee on our workmanship. The enquiries we see most involve old repairs sealed over failed mastic and open joints in brickwork or panels, on shopfronts below residential blocks, communal kitchens and washrooms and external wall and movement joints. Whoever orders the work in New Barn, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.
Converted and older buildings in and around New Barn often put modern windows into old walls. The mastic there needs to suit both surfaces.
We sign every job off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.
- Where
- New Barn (DA3, DA13)
- Region
- Kent
- Guarantee
- A 12-month guarantee
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Work for main contractors and building owners
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
Building owners and managing agents use us on sealant work across single buildings or whole portfolios around New Barn. Several sites can go on one quote, so there’s one set of paperwork to deal with.
What the job involves on each surface
Tenement and older buildings
Some old mastics in pre-2000 buildings contain asbestos and the register is checked before anything is disturbed. If it’s suspected, work stops until it’s tested.
Commercial and mixed-use buildings
Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. A planned programme suits multi-building portfolios.
What we can’t put right
A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:
- Frames that are rotten, warped or broken
- Substrate edges that need repairing first
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
Not sure which it is? You can ring 01277 525 020 or use the quote form and we will tell you honestly before you book.
What we seal
- Communal entrances and stairwells
- Shopfronts below residential blocks
- Communal kitchens and washrooms
- Balcony and threshold joints
- Window and door perimeters on blocks
- External wall and movement joints
Your questions answered
Does your area include sites such as Fawkham Business Park, near New Barn?
Yes. We cover New Barn and the area around it, including industrial estates, business parks and retail parks such as Fawkham Business Park. Photos and a short description are enough for a first look.
Is New Barn off your patch?
No. Small places get the same service as large ones. London and every South East county are within our area. Send photographs and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
When can the area be used after sealing?
We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
Is any job too small?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
Do you supply RAMS and insurance details?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We hold CHAS accreditation and Constructionline membership.
Can you reseal a whole block or estate?
Yes, planned programmes suit estates and portfolios. You get a fixed quote per building or for the whole job.
When is resealing likely to be due?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.
Maintenance after handover
After handover, a little attention goes a long way:
- Ask residents or tenants to report leaks and draughts early
- Share the asbestos register when you send details
- Protect low-level joints in entrances
- Keep a record of when each building was resealed
Keep records of when each building was resealed. It helps plan the next round and gives you a history.
The longer failed joints are left, the more likely the substrate edges break up. Once that happens, repairs come before resealing.
What sets the cost
Your fixed quote is built from the real scope. It takes account of:
- Location, for remote and island sites
- Which sealant the job calls for
- The size and state of each joint
- Removal of failed or old sealant
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
What to include in your enquiry
The more we know, the firmer the quote. Helpful details to send:
- The site address and postcode
- Clear photos of the problem areas
- The product your specification calls for
- Anything awkward about access or site hours
Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Towns and villages near New Barn
More services for New Barn
Our process
Tell us your site hours and access windows and we will plan around them. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. For a site in New Barn, we plan so the whole job is done in one go where possible. Clear photos and measurements help us bring the right products.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
What we need from you
- Tell us which areas need to stay in use
- Send asbestos survey details if the building is pre-2000
- Flag any permit to work we will need
Ask for a quote
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or send details through our quote form.