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

Facade and window perimeter sealing in Hartlip, Kent

Facade sealing in Hartlip, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Draughts around frames and panels
  • Sealant pulling away from frames or panels
  • Patch repairs that keep failing
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Facade sealing in Hartlip

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

From enquiry to sign-off

We follow your site rules from the start: signing in, inductions and any permit to work. Once we’re cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Rural sites near Hartlip may need directions, gate codes or a contact on site. Add it to your enquiry and we’ll build it into the plan.

  1. Access, site rules and timing are settled with the client up front.
  2. We only seal when joints are dry and within the product’s temperature range.
  3. Each joint is cut out and the edges inspected.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. We hand over with our 12-month workmanship guarantee.

Getting the site ready

  • Share your working hours and any access restrictions
  • Let us know about inductions and permits
  • Warn occupants and staff about the work

Getting a fixed quote

Send us photos, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we will arrange one.

Ask for a quote

Advice

Facade sealing for commercial buildings in Hartlip

A good facade joint depends on design as much as product. Joint width needs to match how far the joint moves and how far the sealant can stretch, and closed-cell rod sets the depth, keeping the bond to two faces, often at around 2:1 width to depth, as the manufacturer advises. We work on window and door perimeters, perimeter joints where frames meet the structure and stone and brick facade joints, and what we are called in for most is old perimeter mastic that has dried out and perimeter joints where frames meet the structure. Searching for sealant specialists in Hartlip? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.

In the countryside around places like Hartlip, 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.

A 12-month guarantee applies to all our work in Kent. Should something we installed fail, give us a call on 01277 525 020 or email drawings and photos and we’ll come back to it.

Place
Hartlip (ME9)
Wider area
Kent
Cover
12 months on every job
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Signs you need facade sealing in Hartlip

When the sealant tears down its centre, it has typically been asked to move more than it can. The joint may be too narrow, the bead too thin or the sealant the wrong movement class.

Look out for the following:

  • Gaps between rainscreen or cladding panels
  • Cold air coming in at window perimeters
  • Failed seals around shopfront and entrance frames
  • Leaks at window and door perimeters

For contractors at a school such as Hartlip Endowed Church of England Primary School, sealing has to be finished before term starts.

Questions to ask before you book

  • What level of public liability insurance do they hold?
  • Health and safety accreditation such as CHAS
  • Whether primer will be used where the manufacturer specifies it
  • Their plan for phasing and protecting the area

Questions to ask before you appoint anyone

Owners, agents and contractors

Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Questions we are asked in Hartlip

Is Hartlip off your patch?

No. Small places get the same service as large ones. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.

Will you take on work at estates like Newington Industrial Estate, close to Hartlip?

Yes, sites like Newington Industrial Estate are within our area, along with the rest of Hartlip. To start, just phone 01277 525 020 or email a schedule or drawings with the unit, the joints involved and your access times.

Will you check whether the sealant is causing the leak?

Yes. We check the sealant joints and report what we find before quoting. Where the cause seems to be elsewhere, we’d rather tell you than reseal pointlessly.

How do we ask for a quote?

It works in four steps: send details, get a quote, we seal, guaranteed. The first step only needs photographs and a postcode.

Are your applicators CSCS-carded?

Yes. We use CSCS-carded applicators, as many construction sites ask for.

Do you offer coloured sealant?

That depends on the product. Some ranges are wide, others limited, so the available colours are confirmed with the quote.

Do you hold CHAS accreditation?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

General trades versus a specialist

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.

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, which is what makes a joint last.

Maintenance after handover

Problems stay small when the joints are checked regularly. In particular:

  • Investigate damp beside windows promptly
  • Keep pressure washers away from fresh sealant
  • Clear debris that holds water against joints
  • Combine resealing with other works that need access

Blocked sills and gutters push water at the joints. Good drainage keeps water moving off the facade rather than sitting against the joints.

Don’t wait for a full elevation to fail. Small repairs stop small leaks becoming large ones behind the facade.

How the job changes by surface

Cladding panel joints

Where panels are sealed rather than open-jointed, the bead is part of the weather line. Failed runs are cut out and rebuilt end to end.

Perimeter joints at frames and structure

The joint around a framed system, where it meets the structure, needs sealant. Our work is that perimeter joint rather than the system it surrounds.

Facades, frames and programmes in Hartlip

The sea is no more than about 3 miles from Hartlip. Coastal exposure means perimeter and cladding joints work harder than on an inland job, and the sealant, primer and backing need choosing with that in mind. Hartlip lies roughly 33 miles out from central London. 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.

When units on a site such as Newington Industrial Estate (0.7 miles north-east of Hartlip) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. New wings at hospitals like Medway Maritime Hospital, 4.8 miles to the north-west of Hartlip, bring long runs of window and panel joints to seal.

Hartlip is about 3 miles south-east of Gillingham, in Kent. If you are looking for facade sealing in Hartlip, we can help. We work across 931 places in Kent. For work in that direction, see our London page, about 33 miles away.

We cover the ME9 postcode districts for facade joints. We cover commercial and managed buildings on The Street, Dane Close and Place Lane. If your building is just outside Hartlip, we cover Lower Hartlip (1 mile east), Moor Street (1 mile north-west), Breach (1 mile north-east), Meresborough (1 mile west) and Newington (1 mile east). Nearby towns on our patch include Maidstone (7 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (14 miles north-west) and Minster (9 miles north-east).

Local landmarks in Hartlip

Locally, jobs take us to sites close to Leigh Academy Rainham and Foxburrow Wood, among other places. For rail, the closest station is Newington station, about 1.3 miles east of the centre. Nearby you’ll also find Bayford Court (4.5 miles east) and Medway Maritime Hospital (4.8 miles north-west). Open spaces near Hartlip include Detling Hill and Bishop Saltings.

Map of Hartlip © OpenStreetMap contributors
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