South East England and London

Mastic Sealing in Greater London

For any site across Greater London, our applicators cover mastic sealing in 764 towns and villages, with a fixed quote and a 12-month guarantee.

Mastic Sealing across Greater London

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Request a fixed quote 01277 525 020

Mastic sealing in every part of Greater London

Mastic sealing for building owners, managing agents and housing associations. Choose your town from the list to see local details, or call or email us for a quote.

Biggest towns in Greater London

Other services in Greater London

Postcode districts

Our mastic sealing service in Greater London

For blocks and buildings across Greater London, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. A list of buildings, a few photos and approximate joint numbers are enough for a quick quote, and site visits can be arranged. Site teams most often ask us about draughts at frames across a block and patchy repairs in mismatched sealant, across window and door perimeters on blocks, shopfronts below residential blocks and external wall and movement joints.

We bring the products specified for the job, along with primers and backing rod. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly.

A building-by-building inspection lists the failed joints.
The quote is fixed and split as suits you.
Dates and areas are agreed so occupiers can be told.
Failed sealant is removed and the faces prepared.
Joints are resealed and tooled.
We check the finished work and confirm the guarantee.

Pricing in Greater London

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 requirements come into it too.

What you get with us

Fully insured
Coloured sealants to suit the setting, where available
A Constructionline member, so easy to vet
Colour options checked against the specified product

Getting a fixed quote

A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or phone 01277 525 020 or use the quote form if you’d rather talk the job through.

Local landmarks in London

We work on buildings around St Mary-at-Hill, St George the Martyr and The BFI Reuben Library and the streets around them. Other local landmarks include Trinity Arms Public House (under half a mile south-east), Ark Globe Academy (under half a mile south), Charles Dickens Primary School (less than half a mile north-west) and Newington Gardens (less than half a mile south). London has its own railway station: Elephant & Castle station. A little further out are Surrey Dispensary (less than half a mile south-east) and Baynard's Castle (0.9 miles north). The countryside around London includes Bellenden Road Nature Garden and St. James's Park Lake.

Schools near London include London School of Musical Theatre (under half a mile west)

For owners and agents in Greater London

Across Greater London, from London, City of Westminster and Marylebone outwards, managing agents, landlords and housing associations look after blocks, mixed-use buildings and estates. Mastic around frames, doors and on external joints wears out in time.

All of Greater London is inside the ULEZ, and much of the South East is within easy reach of the capital, so jobs in Greater London are planned with access, loading and parking in mind.

London: Landlords with units on estates such as Southwark Bridge Business Centre, less than half a mile north of London, can bring frame, door and external mastic across several units into one programme. Trustees of buildings like St George the Martyr can bring frame and external mastic into a planned maintenance list.

Why act early?

Adding sealant to cyclical maintenance is an easy win. Waiting until leaks appear means working under pressure and less choice about when.

What your quote should include

How joint depth will be controlled
How they handle RAMS and site documents
Whether primer will be used where the manufacturer specifies it
Can the work be phased to keep areas open?

Why it fails

Sunlight and weather break mastic down over time. The surface chalks, the body stiffens and cracks appear, especially on south and west faces.

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

Draught complaints from residents or tenants
Repeated reactive repairs to the same buildings
Estate-wide sealant that is simply worn out
Patchy repairs in mismatched sealant

Looking after the joints

A few simple habits keep the new joints working:

Make mastic part of routine maintenance checks
Keep bins and bikes away from communal door frames
List the paperwork your organisation requires when you send details
Avoid piecemeal callouts where you can

Include sealant in planned building inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away, and note the building and elevation.

One failed perimeter normally means others on the same building are close, so it pays to look at the whole elevation. A planned reseal saves repeated visits.

What affects the price in Greater London

Quotes vary with the job. It mainly depends on:

The size and state of each joint
Whether the work must be split into stages
Site requirements such as inductions and permits
The total length or number of joints

Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits.

Details that help us quote

A good diagnosis starts with the right details. Tell us:

The site address and postcode
Anything awkward about access or site hours
When you need the work done
Specification clauses that apply

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.

When it isn’t the sealant

Before quoting, we check that sealant is the right answer. It won’t put right:

Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
Failed window or door frames, which need a window contractor
Water coming in from the roof or rainwater goods

Questions about Greater London

Will you just go over the old sealant?

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

How long does a job like this take?

We plan the time on site around your programme and access. We will give you an estimate of time on site when we quote.

What about access for upper-floor joints?

It depends on the building. We agree access with you at quote stage so the fixed quote reflects it.

Is asbestos a concern with old mastic?

We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.

How soon can the area be used again?

We will confirm how long the chosen product needs to cure.

Do you work to architects’ specifications?

Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.

Can you take on resealing for a block portfolio?

Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords and work can be quoted per building or as a whole.