Mastic sealing for building owners and managing agents in Cobham, Kent
Planning work on a mastic joint in Cobham? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Window mastic that has split and shrunk
- Worn sealant at communal door frames
- No planned programme for sealant
Mastic sealing in Cobham
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Honest limits
Part of a good diagnosis is knowing where sealant stops. You will hear from us if the cause turns out to be any of the following:
- Asbestos-containing sealant, which we don’t remove
- Leaks through the frame itself rather than the perimeter
- Broken glass or failed sealed units
Not sure which it is? You can call the office on 01277 525 020 or email a schedule or drawings and we’ll tell you honestly before you book.
What we seal
- Communal kitchens and washrooms
- Balcony and threshold joints
- Communal entrances and stairwells
- External wall and movement joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
How we handle mastic sealing in Cobham
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Communal entrances and stairs stay usable while we work. If you have open joints in brickwork or panels and patchy repairs in mismatched sealant, we can put it right, whatever the surface. Searching for sealant specialists in Cobham? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.
Owners and agents with buildings around smaller places such as Cobham tend to manage small terraces of association properties, converted barns and commercial units. Frame and wall-joint mastic on all of them ages and hardens.
Work we carry out comes with a 12-month guarantee. If an installation problem shows up, call the office on 01277 525 020 or email the details over and we’ll arrange a return visit.
- Where
- Cobham (DA12)
- Wider area
- Kent
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
What sets the cost
Each job is priced on its own details. The main factors are:
- Working within restricted access windows
- Quantities, in metres or numbers
- Specialist products, such as fire-rated or hygienic sealants
- Removal of failed or old sealant
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.
What we need to price the job
A good diagnosis starts with the right details. Let us know:
- Your programme or deadline
- Where the site is, with the postcode
- The asbestos register, for older buildings
- Access details, including height
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or ring 01277 525 020 or email the details over if you’d rather talk the job through.
Why act early in Cobham
Replacing mastic before water gets in is a planned job. After water has got in, there may be damp, damaged plaster or decoration to put right too and occupiers notice. One visit to deal with every failing joint makes more sense than several trips to a place like Cobham. Photos of every joint help us quote for the whole job.
The specified product makes a difference, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site requirements come into it too.
Why clients in Cobham choose us
- Workmanship guaranteed for 12 months
- Constructionline member
- Commercial sealant work since 2005
- One number for every site we cover
See what affects the cost and our accreditations and insurance.
Cobham: questions and answers
Is Cobham too far out for you?
No. Places such as Cobham are covered as much as the big towns. Our area covers London and the South East counties. We plan jobs in smaller places so return trips are kept to a minimum.
Do you cover business parks and estates near Cobham, such as Bowes Industrial Centre?
Yes. Estates, retail parks and business parks around Cobham, Bowes Industrial Centre among them, are all within reach. To start, just give us a call on 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.
What’s the quickest route to a quote?
The quote form is the simplest route, though you can also ring 01277 525 020 or email the details over. Photos, drawings or a joint schedule help us quote quickly.
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 work for managing agents and housing associations?
Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords, and we quote building by building or as a programme.
Do you check for asbestos in old sealant?
In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it, and if it’s suspected, work stops until it’s tested.
How long will the new sealant last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
How a job runs
Diagnose, treat, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and the job ends with a walk round and sign-off. Jobs in and around smaller places like Cobham are normally planned as a single visit, so photographs and measurements up front really help. Then the right materials arrive with us.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- We agree the programme and dates with you.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
Before we start on site
- Agree which areas must stay open
- Warn occupants and staff about the work
- Send asbestos survey details if the building is pre-2000
Request a quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, call 01277 525 020 or send photos by email.
Related advice
Common problems we fix in Cobham
Frames, panels and masonry expand and contract through the year, and every joint has to stretch and squeeze with them. A joint that was too narrow, too thin or the wrong product can’t cope long before it should.
Most enquiries start with one or more of the following:
- Water getting in round frames after rain
- Cracked, hardened mastic round windows on a block
- Worn sealant at communal door frames
- Draughts at frames across a block
If you look after a block within reach of Sole Street station (1.2 miles south-west of Cobham), frame and balcony mastic can be renewed on one programme.
Questions to ask before you book
- How the joint faces will be prepared and primed
- How they handle RAMS and site documents
- Who will actually carry out the work
- What the guarantee covers, and for how long
For owners and agents in Cobham
At about 23 miles from central London, Cobham is within reach of the capital. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres. Cobham sits in one of the drier corners of the country, the South East. Even so, frame mastic only goes on in dry, workable conditions, and elevations facing the sun and the prevailing weather are normally where frame mastic ages first.
If you manage student housing near a university such as University for the Creative Arts - Rochester, which lies east of Cobham, the summer turnaround is the time for mastic. If your remit includes a building such as Cobham Primary School, frame and door mastic can be programmed for the holidays.
Cobham is about 3 miles south of Gravesend, in Kent. If you’re looking for mastic sealing in Cobham, we can help, as we do across Kent. Cobham is one of 931 places in Kent on our list. Sites around London have their own page, about 23 miles away.
We take on mastic joints across the DA12 postcode area. Streets here include The Street, Lawrence Drive and Cobhambury Road. Close to Cobham, our area also takes in Upper Bush (2 miles south-east), Lower Bush (2 miles south-east), Cuxton (2 miles south-east), North Halling (3 miles south-east) and Upper Halling (3 miles south). A short drive away, we cover Maidstone (10 miles south-east), Sittingbourne (15 miles east), Dartford (8 miles north-west), Sevenoaks (12 miles south-west), Gravesend (3 miles north) and Tonbridge (14 miles south).
Near you in Cobham
In Cobham, that means premises near Thamesview School, The Ship Inn and Jeskyns and the streets around them. The closest station to Cobham is Sole Street station, roughly 1.2 miles south-west. A little further out are Rochester Castle (4.3 miles east) and Gravesham Community Hospital (3.9 miles north-west). The countryside around Cobham includes Gad's Hill and Ranscombe Farm.
Nearby places to Cobham
Other services in Cobham
Work for main contractors and building owners
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.