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

Facade and window perimeter sealing in St Lawrence, Kent

Planning work on a facade joint in St Lawrence? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Discoloured or dirty facade joints
  • Previous reseals run over old sealant
  • Water coming in around window frames
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Need facade sealing in St Lawrence?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Building and refurbishing in St Lawrence

With the shore within about 1 mile, St Lawrence counts as a coastal location. Coastal exposure means perimeter and cladding joints work harder than on an inland job, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. St Lawrence is about 65 miles from central London. Building activity in the commuter belt runs from new flats near stations to business park refurbishments, and main contractors there need mastic that keeps to the programme.

For a contractor working at a hospital such as Queen Elizabeth The Queen Mother Hospital, 2.8 miles north of St Lawrence, perimeter and facade sealing is planned around patients and deliveries. Recladding or extending a unit at a site like Pioneer Business Park, under half a mile north-east of St Lawrence, brings panel joints and frame perimeters into the programme.

St Lawrence is about 1 mile west of Ramsgate, in Kent. Businesses, contractors and managing agents in St Lawrence can call on us for facade joints. St Lawrence is one of 931 places in Kent on our list for facade joints. For work in that direction, see our London page.

Commercial sites across CT11 and CT12 are covered for facade joints. For a building on Park Road, Saxon Road and Downs Road or nearby, we can quote for facade joints. Access to St Lawrence is via the A255, so getting applicators and materials to site is simple. Just outside St Lawrence, we also work in Ramsgate (1 mile east), Northwood (1 mile north), Upton (2 miles north-east), St Peter's (2 miles north) and Broadstairs (2 miles north-east). Nearby towns on our patch include Canterbury (14 miles west), Margate (3 miles north), Dover (14 miles south), Deal (8 miles south), Herne Bay (12 miles west) and Tower Hamlets (15 miles south).

Around St Lawrence

Locally, jobs take us to sites close to Chatham House Grammar School, Churchill House School With Railed Area and The Admiral Fox pub, among other places. St Lawrence has its own railway station: Ramsgate station. A little further out are Westwood Cross (1.5 miles north) and Ramsgate General Hospital (0.6 miles south-east). Not far away are Sandwich and Pegwell Bay.

Map of St Lawrence © OpenStreetMap contributors

Facade sealing in St Lawrence

Access is part of every facade job, and we plan it with you before quoting. Tell us about access: whether scaffold is already up, what the client is arranging, and any restrictions on the site, so the price covers the real job. The enquiries we see most involve facade joints cracked through the middle and staining on stone next to old sealant, on window and door perimeters, perimeter joints where frames meet the structure and stone and brick facade joints. Facilities teams, main contractors and managing agents in St Lawrence tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Building work in places the size of St Lawrence is usually small-scale: a handful of new houses, barn conversions, a school or hall extension. Small schemes still need window perimeters, facade joints and internal sealant done to the specification.

We stand by our work: 12 months, guaranteed. That covers our preparation and application, and if something we did falls short, we return to it.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
St Lawrence (CT11, CT12)
Wider area
Kent
Guarantee
12 months on our workmanship
Price
A fixed quote before we start
Phone
01277 525 020
Updated
3 November 2026

After the work

To get the most from the new sealant:

  • Confirm the survey covers external sealants in older buildings
  • Keep sills, gutters and drainage paths clear
  • Walk the elevations once or twice a year
  • Keep pressure washers away from fresh sealant

Keep gutters, sills and drainage paths clear. Sealant copes better when water runs off the facade as designed instead of soaking the joints.

Deal with sections that fail early as soon as they show. A few metres resealed promptly can stop water damage spreading behind the facade.

What sealant work can’t fix

Honesty saves time and money. New sealant won’t cure:

  • Work on the window or framing system itself
  • Arranging specialist high-level access, which is planned with the client
  • Water getting in through cracked render or porous masonry

Not sure which it is? You can phone 01277 525 020 or send photos by email and we will tell you honestly before you book.

Surfaces we seal

  • Window and door perimeters
  • Stone and brick facade joints
  • Coping and flashing joints
  • Perimeter joints where frames meet the structure
  • Shopfront frames
  • Cladding panel joints

Signs you need facade sealing in St Lawrence

The wrong product causes its share of trouble: an acetoxy cure can mark stone or corrode some metals, and interior products break down outdoors. Neutral-cure, facade-grade products are what most external joints need.

If one of these sounds familiar, it’s time for a closer look:

  • Failed sealant on precast panel joints
  • Facade joints cracked through the middle
  • Perimeter joints where frames meet the structure
  • Previous reseals run over old sealant

For contractors at a college like Nelson College London, 1.6 miles to the north of St Lawrence, perimeters and internal sealant are timed for the holidays.

What your quote should include

  • What level of public liability insurance do they hold?
  • Who will actually carry out the work
  • Health and safety accreditation such as CHAS
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?

Questions to ask before you appoint anyone

Common questions from St Lawrence clients

Can being near the sea in St Lawrence affect the sealant we need?

It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.

Is hospital work, at somewhere like Queen Elizabeth The Queen Mother Hospital, something you do?

Yes. Healthcare sites are among the places we work. Each area is agreed with the ward or department and the estates team in advance.

Is it fine to apply new sealant on top of old?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

What will the job cost?

That depends on the job: quantities, access, the product and any phasing. Call for a quote and we’ll price it properly.

Do you seal facades in winter?

Rain and frost can pause external sealing. The programme allows for it and we tell you if the forecast changes things as the work goes on.

How many days will you need on site?

The duration is planned around your programme and the access we are given. We will give you an estimate of time on site when we quote.

Do you run new sealant over the existing bead?

No. Fresh silicone won’t grip cured silicone, so the existing bead is removed entirely and the faces are cleaned before resealing. Nothing else gives a bond that lasts.

Our process

We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. What matters most for a job in St Lawrence is a clear list of what needs doing, so send photos of each area. You’ll then get a fixed price for the work.

  1. We look at the joints, the drawings and the access before pricing.
  2. The old bead is cut away completely, not overlaid.
  3. Both faces are cleaned and, where the product needs it, primed.
  4. Closed-cell rod fixes the depth, and the sealant grips two sides only.
  5. The new sealant goes in and is tooled firmly onto both faces.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Before we start on site

  • Let us know about inductions and permits
  • Have the specification and drawings to hand
  • Point out any areas we must not close

Ask for a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.

Get a price

Advice

Quoting for work in St Lawrence

We price every job individually. The main factors are:

  • Which sealant the job calls for
  • Distance, for remote addresses
  • Phasing around occupants
  • The size and state of each joint

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Before you send an enquiry

A few photographs plus some basic facts will normally do. It helps to include:

  • The type of building and who uses it
  • How the joints are reached, and at what height
  • The site address and postcode
  • When you need the work done

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

What happens if it’s left?

Each spell of rain drives water past a failed facade joint. Behind the frame, that can mean damp plaster, stained ceilings, corroded fixings and damaged insulation. Resealing now costs less than repairing interiors later. Sealant hardens, cracks and loses grip with age, UV and movement. Replacing it before it fails keeps water out.

The specified product makes a difference, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Why clients in St Lawrence choose us

  • Health and safety: CHAS accredited
  • Work to your specification and the manufacturer’s guidance
  • Public liability insurance in place
  • Sealing commercial buildings since 2005

Read how commercial sealant jobs are priced or how we’re accredited.

Accreditations

Trusted. Accredited. Insured.