Kensington mastic sealing
Planning work on a mastic joint in Kensington? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Old repairs sealed over failed mastic
- Draughts at frames across a block
- Communal area joints that look neglected
Mastic sealing for businesses in Kensington
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Mastic sealing for commercial buildings in Kensington
Treatment starts with a proper look: which joints have failed, why, and whether sealant is the right answer. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in and backing rod used wherever a joint is deep. We work on communal entrances and stairwells, communal kitchens and washrooms and window and door perimeters on blocks, and what we’re called in for most is patchy repairs in mismatched sealant and worn sealant at communal door frames. For commercial sealant work in Kensington, you deal with one contact from quote to sign-off, whether it’s one building or several.
For managing agents in Kensington, resident access, notice periods and the building’s rules shape the job. Work is planned with the agent so residents get notice and access is arranged in advance.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we are clear about what is covered before work starts.
- Location
- Kensington (W11, W8, W14, SW7)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Aftercare for building managers
For the best life from the joints:
- List the paperwork your organisation requires when you send details
- Encourage occupiers to report problems at frames
- Plan resealing building by building rather than complaint by complaint
- Reduce knocks to communal area joints
Keep bins, bikes and deliveries away from low-level joints where you can. Knocks cause many early failures in communal areas.
Water getting in round frames can damage plaster, decoration and the frames themselves. Early resealing is far simpler than repairs inside.
Our process
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Failed sealant is removed and the faces prepared.
- New sealant goes in with backing rod and primer where needed.
- Each building is checked and signed off with the 12-month guarantee.
What we need from you
- Move anything stored against the joints
- Point out parking and an unloading spot
- Point out any areas we must not close
Quotes
Every quote starts with the facts: 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.
Related advice
Quoting for work in Kensington
The price varies from site to site. It mainly depends on:
- Distance, for remote addresses
- Whether old sealant has to be cut out first
- Quantities, in metres or numbers
- Backing rod, priming and other preparation
No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.
Details that help us quote
However big the job, the same details help:
- Any specification or named product
- Whether an asbestos survey exists
- Any dates the work must fit around
- How the joints are reached, and at what height
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or email us with what you know.
Leave it or put it right?
Resealing ahead of leaks keeps it to a maintenance task. After water has got in, there may be damp, damaged plaster or decoration to put right too and occupiers notice. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
The product called for affects the cost, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.
Why appoint us
- Sealing commercial buildings since 2005
- Workmanship guaranteed for 12 months
- Constructionline member for supplier checks
- Work to your specification and the manufacturer’s guidance
Questions we are asked in Kensington
Do you cover business parks and estates near Kensington, such as Berghem Mews Business Village?
Yes, sites like Berghem Mews Business Village are within our area, along with the rest of Kensington. Photos and a short description are enough for a first look.
We manage a building near Kensington Olympia station. Can you help?
Yes, we work for agents, landlords and housing associations with blocks of every size. Photos of each elevation help us quote accurately.
Do you check for asbestos in old sealant?
Asbestos removal isn’t part of our work. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.
Which sealant will you use?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Does the weather affect the work?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.
Do you work with property factors and landlords?
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.
How many days will you need on site?
The duration is planned around your programme and the access we are given. We’ll give you an estimate of time on site when we quote.
Nearby places to Kensington
What else we do in Kensington
Block-wide mastic in Kensington
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We plan around the notices and access you arrange.
For a school such as St Barnabas and St Philip's CofE Primary School, perimeter mastic on windows and doors is a holiday job. Student accommodation around universities such as University of Westminster (to the south-west of Kensington) is normally managed block by block, which suits a planned mastic programme. Blocks of flats and mixed-use buildings often cluster around stations such as Kensington Olympia station (to the south-west of Kensington) and their window and balcony mastic tends to age at the same rate across a building.
Kensington is about 5 miles west of London, in Greater London. We send applicators to Kensington for mastic joints. Our Greater London coverage takes in 764 places, from busy centres to rural villages.
We take on mastic joints across the W11, W8, W14 and SW7 postcode area, for business premises of every kind. Streets here include Kensington High Street, Edwardes Square and Somerset Square. Main routes into Kensington include the A402 and B316. Just outside Kensington, we also work in Holland Park (1 mile north), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). Nearby towns on our patch include London (5 miles east), Marylebone (3 miles north-east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles north-east). Among the larger centres in Greater London is Kensington, and its commercial and public buildings are all within our area.
Landmarks near Kensington
Locally, jobs take us to sites close to Holland Park, Scarsdale Tavern and Holland Park School and the streets around them. Other local landmarks include Kensington School (0.5 miles east) and Abdus Salam Library (1 mile east). Kensington has its own railway station: Kensington Olympia station. Other landmarks nearby include Kensington Arcade (less than half a mile east) and London Museum (0.7 miles north-east). The countryside around Kensington includes WWT London Wetland Centre and The Long Water.
Site staff or a sealant specialist?
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.
Surface by surface
External movement joints
Movement joints are cleaned out, backed with rod and resealed with a sealant of the right movement class.
Planned maintenance
Adding mastic to planned maintenance avoids reactive repairs and spreads the work.