Mastic Sealing in Borstal
Sealant work in Borstal for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Leaks at window and door perimeters
- Cracked, hardened mastic round windows on a block
- No planned programme for sealant
Mastic sealing for Borstal sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing in Borstal, done properly
Across Borstal and the rest of Medway, we work the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photos of typical joints and a rough idea of quantities let us give a quick quote or we can visit. The enquiries we see most involve window mastic that has split and shrunk and estate-wide sealant that is simply worn out, on window and door perimeters on blocks, communal entrances and stairwells and balcony and threshold joints. Whoever orders the work in Borstal, the brief is typically the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
For landlords and associations with stock in and around Borstal, grouping buildings into one visit saves travel. One quote can cover a whole list of addresses.
Work we carry out in Medway comes with a 12-month guarantee. Should something we installed fail, speak to us on 01277 525 020 or email drawings and photos and we will come back to it.
- Location
- Borstal (ME1, ME2)
- Wider area
- Medway
- Cover
- 12 months on every job
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
What happens if it’s left?
Looking at mastic during planned maintenance costs little. Waiting until leaks appear means working under pressure with less control over timing. Over time, UV, weather and movement wear any sealant out. Replacing it before it fails keeps water out.
What a job costs comes down to how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a quote when you’re ready.
Why appoint us
- Workmanship guaranteed for 12 months
- RAL and finish matching where the product range allows
- CSCS-carded applicators
- Colour options checked against the specified product
Common questions from Borstal clients
Can you quote for a block close to Cuxton station?
Yes. Blocks of any size are within what we do. Photos of each elevation help us quote accurately.
Can you work at a site such as Strood Retail Park, by Borstal?
Yes, sites like Strood Retail Park are within our area, along with the rest of Borstal. Photos and a short description are enough for a first look.
What if the old mastic contains asbestos?
Asbestos removal isn’t part of our work. Anything suspect is tested before we carry on, and the duty to manage asbestos sits with the dutyholder.
Does weather matter for sealant work?
Outside, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
How do you handle work on occupied blocks?
The work is planned around occupiers. We agree the programme so you can notify occupiers, and entrances stay in use.
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.
Frames, entrances and external joints in Borstal
At about 26 miles from central London, Borstal is within reach of the capital. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres. Rainfall across the South East, Borstal included, is lower than in many parts of the UK. Even so, frame mastic only goes on in dry, workable conditions, while the elevations that take the most sun tend to show hardened mastic first.
Landlords with units on estates such as Strood Retail Park (1.4 miles north of Borstal) can bring frame, door and external mastic across several units into one programme. Schools and community buildings such as St William of Perth Roman Catholic Primary School need frame and external mastic kept sound like any building.
Borstal is about 1 mile south-west of Rochester, in Medway. Businesses, contractors and managing agents in Borstal use us for work on mastic joints, as part of our coverage of Medway. Across Medway, 54 places are covered, Borstal among them. There’s a separate page for London, about 26 miles away.
Postcode districts covered here: ME1 and ME2. For a building on Hill Road, Manor Lane and Mount Road or nearby, send details and we will quote for mastic joints. Borstal sits on or close to the M2, useful when we plan access and materials. Just outside Borstal, we also work in Rochester (1 mile north-east), Strood (1 mile north), Cuxton (1 mile west), North Halling (2 miles west) and Wouldham (2 miles south-west). Nearby towns on our patch include Gillingham (4 miles east), Rainham (5 miles east), Park Wood (5 miles east), Lordswood (4 miles south-east), Twydall (4 miles east) and Hoo St Werburgh (5 miles north-east).
Near you in Borstal
Recent enquiries here include premises near Sir Joseph Williamson's Mathematical School, Former Ordnance Store At Chatham Gun Wharf and St John Fisher RC Comprehensive School and the streets around them. The closest station to Borstal is Cuxton station, roughly 1 mile west of the centre. Nearby you will also find Six Poor Travellers House (1.3 miles north-east) and Rochester Castle (1.3 miles north-east). Open spaces near Borstal include Blue Bell Hill and Ranscombe Farm.
Signs you need mastic sealing in Borstal
Much failed sealant was laid on dirty, dusty or damp surfaces. Where the faces weren’t cleaned or primed as specified it comes away from one face.
Look out for the following:
- Mastic failing across several blocks on an estate
- Cracked, hardened mastic round windows on a block
- Communal area joints that look neglected
- Draughts at frames across a block
For agents with blocks near Cuxton station, 1 mile west of Borstal, a block-wide mastic programme deals with frames, balconies and entrances in one go.
What your quote should include
- Their plan for phasing and protecting the area
- Health and safety accreditation such as CHAS
- How the joint faces will be prepared and primed
- The named product and why it was chosen
Keeping the joints sound
Cleaning and maintenance staff play a part too. Pass these on to them:
- Look at the sunniest and most exposed elevations first
- Share your contractor requirements early
- Share the asbestos register when you send details
- Track which buildings were done and when
Where a paintable product was specified, it can be painted after curing. Silicone typically can’t be painted, so keep decorators off it unless told otherwise.
Water getting in round frames can damage plaster, decoration and the frames themselves. Early resealing is far simpler than repairs inside.
Diagnose, treat, sign off
We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. What matters most for a job in Borstal is a clear list of what needs doing, so send photos of each area. A fixed quote follows.
- A building-by-building inspection lists the failed joints.
- 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.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
Getting the site ready
- For older buildings, check the asbestos register before work
- Let building users know which areas are affected
- Tell us what induction or permit system the site runs
Get a fixed quote
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 will fill any gaps with a visit.
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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:
- Misted or failed double-glazed units
- Materials that need asbestos testing before work
- Masonry that has broken away beside the joint
Not sure which it is? You can ring 01277 525 020 or email the details over and we will tell you honestly before you book.
What we seal
- Window and door perimeters on blocks
- Communal kitchens and washrooms
- Balcony and threshold joints
- External wall and movement joints
- Communal entrances and stairwells
- Shopfronts below residential blocks
Work for main contractors and building owners
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Borstal can form part of a wider programme across Medway.
Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.