Mastic sealing for building owners and managing agents in Platt, Kent
Need mastic sealing in Platt? It’s simple: send details, get a quote, we seal, guaranteed.
- Damaged joints in communal entrances and corridors
- Occupiers reporting cold air round windows
- Old repairs sealed over failed mastic
Mastic sealing for Platt sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
How the quote is worked out
Sealant work doesn’t have a standard rate, because every site is different. What we take into account:
- The size and state of each joint
- Removal of failed or old sealant
- Induction, permit and paperwork requirements
- Distance, for remote addresses
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we’ll explain how it’s made up.
Before you send an enquiry
It doesn’t need to be a full survey. A few details are enough to get going:
- Access details, including height
- Drawings or a marked-up plan, if available
- Specification clauses that apply
- Any dates the work must fit around
Pricing a project or setting a maintenance budget? We will quote against your scope and drawings that you can work with. For a chat about it beforehand, call the office on 01277 525 020 or send photos by email.
Mastic sealing for commercial buildings in Platt
We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed, with backing rod setting the depth where it’s needed. We work on window and door perimeters on blocks, shopfronts below residential blocks and communal kitchens and washrooms, and the usual reasons a site gets in touch are window mastic that has split and shrunk and estate-wide sealant that is simply worn out. Searching for sealant specialists in Platt? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.
Rural conversions near places like Platt often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.
Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- Platt (TN15)
- Wider area
- Kent
- Guarantee
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Your questions answered
Does your area include sites such as Bourne Enterprise Centre, near Platt?
Yes. We cover Platt and the area around it, including industrial estates, business parks and retail parks such as Bourne Enterprise Centre. Send details of the unit and the work through our quote form for a quick quote.
Do you work for managing agents with blocks near Borough Green & Wrotham station?
Yes. Blocks of any size are within what we do. Photos of each elevation help us quote accurately.
Can you work to our specification?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.
Is it fine to apply new sealant on top of old?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
How do you reach windows on upper floors?
Every block is different. We agree access with you at quote stage so there are no surprises.
Do you check for asbestos in old sealant?
We don’t remove asbestos-containing materials. Anything suspect is tested before we carry on, and the duty to manage asbestos sits with the dutyholder.
Will residents or tenants be disturbed?
Residents and tenants carry on as normal. We flag any areas that need internal access well before the dates so it can be arranged.
Do you need mastic sealing in Platt?
In communal areas, joints take knocks from bins, bikes, buggies and deliveries, with joints near the floor and around doors suffering most. Regular cleaning wears them further.
It’s worth sending us details if you spot any of the following:
- Cracked, hardened mastic round windows on a block
- Damp patches beside frames
- A mix of products and colours from past repairs
- No planned programme for sealant
For agents with blocks near Borough Green & Wrotham station, which lies west of Platt, a block-wide mastic programme deals with frames, balconies and entrances in one go.
What your quote should include
- Their pre-qualification and accreditations
- The terms of the workmanship guarantee
- Will failed sealant be removed rather than covered?
- Is the sealant right for the movement and the substrate?
After the work
For the best life from the joints:
- Make it easy for occupiers to report draughts
- Check the asbestos register before any old mastic is disturbed
- Make mastic part of routine maintenance checks
- Look at the sunniest and most exposed elevations first
Add mastic joints to your cyclical inspections. Check for splits, open joints, brittle mastic and lifting edges, and note the building and elevation.
Water getting in round frames can damage plaster, decoration and the frames themselves. Resealing early keeps the job small.
When it isn’t the sealant
A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:
- Materials that need asbestos testing before work
- Masonry that has broken away beside the joint
- Leaks through the frame itself rather than the perimeter
If you are not sure, just ring 01277 525 020 or email the details over and we’ll give you a straight answer.
Joints and surfaces we work on
- Balcony and threshold joints
- External wall and movement joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Communal kitchens and washrooms
- Communal entrances and stairwells
For owners and agents in Platt
Platt is in the South East, one of the UK’s drier regions. 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. At about 23 miles from central London, Platt is within reach of the capital. Within reach of London, blocks run by agents and associations are common around stations.
Trustees of buildings like Church of St Mary can bring frame and external mastic into a planned maintenance list. Older buildings near Platt, from historic houses such as Old Soar Manor (to the south of Platt) to more modest stock, need compatible products when frames are resealed.
Platt is about 6 miles east of Sevenoaks, in Kent. We cover commercial sites throughout Platt, whether it’s a single job or part of a planned programme. Platt is one of 931 places in Kent on our list. Our London page has more on work in that area.
Commercial sites across TN15 are covered. Buildings on St Mary's Close, Grange Road and Platt Common are within our area. Nearby places we also cover include Comp (1 mile south-east), Borough Green (1 mile west), Crouch (1 mile south-west), Wrotham Heath (1 mile north-east) and Basted (1 mile south-west). Nearby towns on our patch include Maidstone (9 miles east), Dartford (12 miles north-west), Sevenoaks (6 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south).
Near you in Platt
Around Platt, our work takes us to commercial buildings near Wrotham School, The Blue Anchor pub and Wrotham School, among other places. For rail, the closest station is Borough Green & Wrotham station, roughly 0.9 miles west of the centre. Nearby you’ll also find Ightham Court (1.8 miles west) and Beechin Wood Archery Museum (less than half a mile south-east).
Building owners, agents and FMs in Platt
Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Platt. Several sites can go on one quote, which keeps the paperwork simple.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
Places near Platt
What else we do in Platt
From enquiry to sign-off
At the end of each section, we remove the tape, clean down and inspect every joint. If an area should be left alone while the sealant cures, we say how long and put signs out. Rural sites near Platt may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.
- We inspect the joints, building by building, and record what has failed and why.
- A fixed quote follows, split by block or building if that suits you.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- 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.
Getting the site ready
- Warn occupants and staff about the work
- Tell us what induction or permit system the site runs
- For older buildings, check the asbestos register before work
Request a quote
For a fixed quote, speak to us on 01277 525 020 or email the details over. You can also send details through our quote form.