New Ash Green mastic sealing
Mastic sealing in New Ash Green, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Complaints coming in block by block
- A mix of products and colours from past repairs
- Open joints in brickwork or panels
Mastic sealing near New Ash Green
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Mastic sealing in New Ash Green, done properly
Before work starts, most agents and landlords want the documents in order. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We are a Constructionline member and CHAS accredited, and we carry public liability insurance. We work on communal kitchens and washrooms, external wall and movement joints and window and door perimeters on blocks, and what we are called in for most is draught complaints from residents or tenants and mastic failing across several blocks on an estate. One point of contact handles commercial sealant work in New Ash Green from the first photos to the final walk-round, for single jobs and planned programmes alike.
In and around smaller places like New Ash Green, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Frame and wall-joint mastic on all of them ages and hardens.
The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Where
- New Ash Green (DA3, TN15)
- Wider area
- Kent
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
What happens if it’s left?
Dealing with failed joints one report at a time is slow and scattered. Planned resealing covers a whole building or estate in one go and is simpler to manage and budget. Around New Ash Green, it’s better to renew all the failing joints at once, rather than one at a time. Send photographs of each area and we’ll quote for the lot.
A quote for mastic joints depends on quantities, condition and access, plus any specification you are working to. Ask us for a fixed quote.
Why choose Mastic Doctor in New Ash Green
- Public liability insurance in place
- Workmanship guaranteed for 12 months
- Clear, fixed quotes
- Commercial sealant work since 2005
Read our cost guide and how we’re accredited.
Nearby places to New Ash Green
Also in New Ash Green
Common problems we fix in New Ash Green
Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified it comes away from one face.
Clients usually get in touch after noticing one or more of the following:
- Damaged joints in communal entrances and corridors
- Repeated reactive repairs to the same buildings
- The same joint failures repeated across a portfolio
- Failed external movement joints
Property owners at sites such as Heaver Farm Trading Estate (0.7 miles south-west of New Ash Green) can have mastic renewed between lettings.
What your quote should include
- Whether old or failed sealant will be cut out, not overlaid
- Their plan for phasing and protecting the area
- Are they CHAS accredited or on Constructionline?
- Who will actually carry out the work
Owners, agents and contractors
Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.
We work for building owners and managing agents on sealant work across single buildings or whole portfolios. One quote can cover more than one site, which keeps the paperwork simple.
Questions we’re asked in New Ash Green
Will you take on a block within reach of Longfield station?
Yes. Blocks of any size are within what we do. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
Is a smaller place like New Ash Green outside your area?
No. Small places get the same service as large ones. Our area covers London and the South East counties. Send photos and a list of what needs doing, and we will plan the job to need as few trips as possible.
Can you work to our specification?
Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it.
Can you seal joints high up on a block?
It depends on the building. How upper joints are reached is agreed before work is booked so there are no surprises.
Is asbestos a concern with old mastic?
Some mastics in pre-2000 buildings contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.
Can you reseal a whole block or estate?
Yes, planned programmes suit estates and portfolios. The quote can be split however suits your budgeting.
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.
On site: what to expect
Working in a building that stays open takes some planning. We sign and contain the area we are in, keep walkways clear and move on in phases so staff and visitors can carry on around us. If others near New Ash Green need work, visits can be combined, which keeps travel down. A fixed quote is given before anything starts.
- First we look at the mastic on each building and note what needs replacing.
- A fixed quote follows, split by block or building if that suits you.
- Dates, areas and access are agreed so residents or tenants can be told in advance.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
Preparing the site
- Tell staff and tenants when we will be in
- Send asbestos survey details if the building is pre-2000
- Agree which areas must stay open
Ask for a quote
Send us photographs, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Read more
Planned mastic for New Ash Green portfolios
New Ash Green is about 20 miles from central London. Within reach of London, blocks run by agents and associations are common around stations; their frame mastic often ages block-wide. Rainfall across the South East, New Ash Green included, is lower than in many parts of the UK. Even so, frame mastic only goes on in dry, workable conditions, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
Churches, halls and community buildings such as Parish Church of Saint Peter and Saint Paul are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. Historic properties like Cobham College, 4.3 miles to the east of New Ash Green, show the age of some local stock, where frame mastic must suit soft brick or stone.
New Ash Green is about 5 miles south of Northfleet, in Kent. Looking for mastic sealing in New Ash Green? We can help, as we do across Kent. 931 places across Kent fall within our area, New Ash Green among them. Our London page has more on work in that area.
We cover the DA3 and TN15 postcode districts. Streets here include Church Road, Upper Street North and Upper Street South. Nearby places we also cover include Ridley (1 mile south-east), Hartley (1 mile north), New Street (2 miles south-east), Hodsoll Street (2 miles south-east) and Longfield Hill (2 miles north-east) for mastic joints. Nearby towns on our patch include Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (8 miles south-west), Gravesend (5 miles north-east), Tonbridge (12 miles south) and Northfleet (5 miles north).
What’s near New Ash Green
Around New Ash Green, our work takes us to commercial buildings near The White Swan Public House, Longfield Academy and Rectory Meadow. For rail, the closest station is Longfield station, about 2.1 miles north. Other landmarks nearby include Eynsford Castle (4 miles west) and Darent Valley Hospital (5.2 miles north-west).
When something else is needed
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Leaks from above rather than through a joint
- Glazing that needs replacing
- Failed window or door frames, which need a window contractor
Not sure which it is? You can phone 01277 525 020 or email drawings and photos and we’ll tell you honestly before you book.
Surfaces we seal
- Window and door perimeters on blocks
- External wall and movement joints
- Communal entrances and stairwells
- Shopfronts below residential blocks
- Balcony and threshold joints
- Communal kitchens and washrooms
Cost factors for mastic joints
These are the things that shape the price:
- Quantities, in metres or numbers
- The site’s rules and procedures
- The size and state of each joint
- Specialist products, such as fire-rated or hygienic sealants
Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.
Before you send an enquiry
Good information means a firmer quote. Helpful details to send:
- Photos of the joints, close up and from further back
- Any specification or named product
- Anything awkward about access or site hours
- Drawings or a marked-up plan, if available
Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, ring 01277 525 020 or email us.