Westerham mastic sealing
Sealant work in Westerham for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Brittle perimeter mastic across a building
- Old repairs sealed over failed mastic
- Mastic failing across several blocks on an estate
Mastic sealing across Westerham
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
From enquiry to sign-off
Tell us your site hours and access windows and we’ll plan around them. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. Several jobs near Westerham can be grouped on one trip. Tell us your site hours and we will plan around them.
- 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.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Preparing the site
- Tell us what induction or permit system the site runs
- Tell us your opening times and when work is allowed
- Tell us which areas need to stay in use
Getting a fixed quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. To get it moving, ring 01277 525 020 or email drawings and photos.
Related advice
Mastic sealing in Westerham
Most buildings come with mastic joints nobody has looked at since handover and it slowly wears out: 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 along with complaints. We work on communal kitchens and washrooms, external wall and movement joints and communal entrances and stairwells, and the usual reasons a site gets in touch are estate-wide sealant that is simply worn out and draught complaints from residents or tenants. One point of contact handles commercial sealant work in Westerham from the first photos to the final walk-round, for single jobs and planned programmes alike.
Older buildings and conversions around places like Westerham mix old masonry with newer frames. Perimeter joints need a sealant that suits both frame and masonry.
Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.
- Where
- Westerham (TN16)
- Wider area
- Kent
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Towns and villages near Westerham
What else we do in Westerham
Owners, agents and contractors
If you look after buildings for someone else, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
What sealant work can’t fix
We check first that sealant really is the fix. It won’t put right:
- Glazing that needs replacing
- Leaks through the frame itself rather than the perimeter
- Cracked or crumbling render, brick or stone at the joint edges (we’ll tell you if so)
If in doubt, phone 01277 525 020 or use the quote form and we will say what we think.
What we seal
- External wall and movement joints
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- Balcony and threshold joints
What affects the price in Westerham
We price every job individually. The main factors are:
- Which sealant the job calls for
- How much existing material needs removing
- Distance, for remote addresses
- How accessible the joints are
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Before you send an enquiry
For an accurate fixed quote, we need to understand the site. Useful things to include:
- Any specification or named product
- Asbestos survey details if the building is older
- Clear photographs of the problem areas
- Anything awkward about access or site hours
Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.
Do you need mastic sealing in Westerham?
Many failed joints were sealed without backing rod so the mastic is bonded on three sides. It can’t stretch properly and splits as the building moves.
Any of the following is a good reason to get the joints checked over:
- Repeated reactive repairs to the same buildings
- Window mastic that has split and shrunk
- Patchy repairs in mismatched sealant
- Mastic failing across several blocks on an estate
Trustees of buildings like Church of St Mary the Virgin can bring frame and external mastic into a planned maintenance list.
Before you book anyone
- Do they follow the manufacturer’s priming guidance?
- Which product they’ll use, and why it suits the joint
- Whether their applicators hold CSCS cards
- What the guarantee covers, and for how long
Questions about Westerham
Do you take on block-wide or estate-wide mastic work in Westerham?
Yes. Portfolio-wide programmes are a regular request. Residents are given notice through you, and the work moves building by building.
Is Westerham off your patch?
Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.
How many days will you need on site?
We plan the time on site around your programme and access. You’ll have an expected duration with the quote.
How do you choose the sealant?
A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.
Can you seal joints high up on a block?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned and we’ll confirm the approach in the quote.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Leave it or put it right?
Mixed repairs by different contractors leave a patchwork of products and colours. A block-wide reseal gives one product, one colour and one guarantee. Sealant hardens, cracks and loses grip with age, UV and movement. Renewing it in good time keeps the building weathertight.
There’s no price list, because the scope varies so much from one building to the next. Call for a quote.
Why appoint us
- One contact handling all your sites
- Products installed to the manufacturer’s instructions
- Fully insured
- Colour options checked against the specified product
Take a look at our cost guide and our accreditations.
Planned mastic for Westerham portfolios
Westerham lies roughly 17 miles out from central London. Within reach of London, blocks run by agents and associations are common around stations. Westerham sits in one of the drier corners of the country, the South East. Outside work still depends on dry joints, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
Historic properties like Quebec House, 0.2 miles south-east of Westerham, show the age of some local stock, where frame mastic must suit soft brick or stone. If you look after a block within reach of Hurst Green station, 3.4 miles to the south-west of Westerham, frame and balcony mastic can be renewed on one programme.
Westerham is about 5 miles west of Sevenoaks, in Kent. Looking for mastic sealing in Westerham? We can help, as we do across Kent. Across Kent, 931 places are covered, Westerham among them. London is covered too, around 17 miles from Westerham.
We take on mastic joints across the TN16 postcode area. We cover commercial and managed buildings on Market Square, London Road and High Street. Access to Westerham is via the A25 and B2024, so getting applicators and materials to site is simple. Sites close to Westerham are covered too, including Force Green (1 mile north), Moorhouse Bank (1 mile south-west), Goodley Stock (2 miles south), The Chart (2 miles south-west) and South Street (2 miles north-west). A short drive away, we cover Dartford (14 miles north-east), Sevenoaks (5 miles east), Royal Tunbridge Wells (12 miles south-east), Tonbridge (10 miles south-east), Swanley (10 miles north-east) and Kings Hill (14 miles east).
Local landmarks in Westerham
Locally, jobs take us to sites close to The Olde House At Home Public House, among other places. The closest station to Westerham is Hurst Green station, about 3.4 miles south-west. A little further out are Tandridge Priory (2.2 miles south-west). Open spaces near Westerham include Betsom's Hill and Dryhill Nature Reserve.