The Mastic Doctor team standing beside their branded vans outside an office building
Kent · England

Mastic sealant contractors in Grafty Green

We carry out mastic sealing for building owners, managing agents and housing associations in Grafty Green. Send photographs or drawings for a fixed quote.

  • Old repairs sealed over failed mastic
  • Occupiers reporting cold air round windows
  • Window mastic that has split and shrunk
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
£5m public liability

Mastic sealing for Grafty Green sites

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Owners, agents and contractors

FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.

Hotels, schools, healthcare sites, offices and retail units book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

Mastic sealing in Grafty Green

Owners and agents usually inherit a building’s mastic rather than choose it, and it ages quietly: it sits round windows and doors, along external joints and through communal areas. Once it cracks, hardens or comes away, draughts and water find a way in, and occupiers start reporting it. If you have draughts at frames across a block and worn sealant at communal door frames, we can put it right. Most enquiries from Grafty Green 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.

Owners and agents with buildings around smaller places such as Grafty Green tend to manage small terraces of association properties, converted barns and commercial units. Frame and wall-joint mastic on all of them ages and hardens.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.

Place
Grafty Green (ME17)
Wider area
Kent
Guarantee
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

When to call us in Grafty Green

Buildings move with temperature and moisture, and the sealant takes up that movement. If the joint or the product wasn’t suited to the movement, it splits and fails early.

Look out for the following:

  • Mastic failing across several blocks on an estate
  • Patchy repairs in mismatched sealant
  • Damp patches beside frames
  • Draughts at frames across a block

Churches, halls and community buildings such as Church of St Nicholas are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.

What to look for in a quote

  • Can the work be phased to keep areas open?
  • Their pre-qualification and accreditations
  • How the existing material will be dealt with
  • How long is the guarantee, and what does it include?

How to choose a sealant contractor

When to bring in a specialist

Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.

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.

From enquiry to sign-off

In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then handed back before we move to the next. Jobs in and around smaller places like Grafty Green are typically planned as a single visit, so photos and measurements up front really help. That way the right products come on the day.

  1. We inspect the joints, building by building, and record what has failed and why.
  2. A fixed quote follows, split by block or building if that suits you.
  3. The programme is fixed with you, including dates you can pass on to residents or tenants.
  4. Old sealant is stripped and each face prepared back to firm material.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Completed joints are inspected and carry a 12-month workmanship guarantee.

Getting the site ready

  • Clear stock, furniture or equipment away from the joints
  • Agree which areas must stay open
  • Let us know about inductions and permits

Getting a fixed quote

Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or email a schedule or drawings.

Ask for a quote

Read more

Grafty Green: questions and answers

Do you work for managing agents with blocks near Lenham station?

Yes, and several blocks can go on one quote. We work to your notice and access arrangements.

Does your area include sites such as Roebuck Business Park, near Grafty Green?

Yes, sites like Roebuck Business Park are within our area, along with the rest of Grafty Green. Send details of the unit and the work through our quote form for a quick quote.

Can you send RAMS and CSCS details before starting?

Our credentials include CHAS, Constructionline and public liability insurance. For specific documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.

Will residents or tenants be disturbed?

Residents and tenants carry on as normal. If any flats or units need access, we will tell you in advance so you can arrange it with occupiers.

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.

Do you guarantee the mastic work?

Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.

How soon can the area be used again?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, so we will confirm the curing time on the day.

Why it’s worth doing now in Grafty Green

Open external joints let water into walls and around frames. That can lead to damp, staining and damage to finishes, which is harder to deal with than resealing. Converted and older buildings near places like Grafty Green tend to move, and aged sealant cracks. The right product, sized to the joint, copes much better.

Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

Why us?

  • Our applicators hold CSCS cards
  • CHAS accredited
  • One contact handling all your sites
  • A range of standard colours, depending on the product

See what affects the cost and our accreditations and insurance.

Surface by surface

Planned maintenance

Mastic wears out like any building component; how fast comes down to movement, weather, UV and the product. Inspecting joints regularly keeps programmes on track.

External movement joints

Joint size and product are matched to the expected movement, often around 2:1 width to depth, as the manufacturer advises.

Mastic sealing around Grafty Green: what changes locally

Grafty Green is about 39 miles from central London. Managed blocks of flats are a big part of commuter-belt property. The South East is one of the drier parts of the UK. Outside work still depends on dry joints, and the sunniest, most exposed sides of a building usually need attention first.

Site managers at schools like Platts Heath Primary School can fit frame mastic into the summer works. Owners of student blocks near Canterbury Christ Church University, 4.1 miles north of Grafty Green, can schedule frame and external mastic for the summer vacation.

Grafty Green is about 8 miles south-east of Maidstone, in Kent. Anywhere in ME17, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Across Kent, 931 places are covered, Grafty Green among them. Our London page has more on work in that area (39 miles or so).

We cover the ME17 postcode districts. For a building on Church Road, Woodcock Lane and Headcorn Road or nearby, we can quote for mastic joints. Close to Grafty Green, our area also takes in Liverton Street (1 mile north), Boughton Malherbe (1 mile north-east), Broadstone (1 mile south-west), Eastwood (1 mile west) and Platt's Heath (1 mile north). Further afield, our area takes in Maidstone (8 miles north-west), Ashford (9 miles south-east), Sittingbourne (10 miles north), Faversham (12 miles north-east), Minster (15 miles north) and Kings Hill (13 miles west).

Around Grafty Green

We work on buildings around Kiln Wood, The Kings Head Public House and The Lenham School, among other places. Grafty Green’s nearest station is Lenham station, roughly 2.1 miles north-east. Other landmarks nearby include The Dog Collar Museum (3.4 miles north-west) and Coldbridge Castle (1 mile south-east).

Map of Grafty Green © OpenStreetMap contributors
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