Mastic sealant contractors in Dunbridge
Mastic sealing in Dunbridge, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Brittle perimeter mastic across a building
- A mix of products and colours from past repairs
- Leaks at window and door perimeters
Mastic sealing for businesses in Dunbridge
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
What we can’t put right
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. It won’t fix:
- Failed window or door frames, which need a window contractor
- Glazing that needs replacing
- Substrate edges that need repairing first
If you are not sure, just give us a call on 01277 525 020 or use the quote form and we will give you a straight answer before you book.
Surfaces we seal
- Balcony and threshold joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- External wall and movement joints
- Shopfronts below residential blocks
- Communal entrances and stairwells
Mastic sealing in Dunbridge
Before work starts, most agents and landlords want the documents in order. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member, with public liability insurance. We work on window and door perimeters on blocks, external wall and movement joints and communal kitchens and washrooms, and the failures we are asked to look at most are worn sealant at communal door frames and old repairs sealed over failed mastic. A specialist sealant contractor works differently from a general builder: in Dunbridge, that means joint design, primers and backing rod as standard.
In and around smaller places like Dunbridge, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Mastic around frames and on external joints wears out in time, whatever the building.
Work we carry out in Hampshire comes with a 12-month guarantee. If an installation problem shows up, call 01277 525 020 or send photos by email and we will arrange a return visit.
- Location
- Dunbridge (SO51)
- Region
- Hampshire
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Looking after buildings in and around Dunbridge
Dunbridge is in the South East, one of the UK’s drier regions. Outside mastic still needs a dry joint and the right temperature, while the elevations that take the most sun tend to show hardened mastic first. Dunbridge is about 70 miles from central London. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres; their frame mastic often ages block-wide.
Blocks of flats and mixed-use buildings often cluster around stations such as Mottisfont & Dunbridge station, under half a mile to the north-west of Dunbridge, and their window and balcony mastic tends to age at the same rate across a building. Historic properties like Mottisfont Abbey, 0.7 miles north-east of Dunbridge, show the age of some local stock, where frame mastic must suit soft brick or stone.
Dunbridge is about 4 miles north-west of Romsey, in Hampshire. We cover Dunbridge, with the same fixed quotes and 12-month guarantee as everywhere else. We work across 723 places in Hampshire. Southampton is covered too, around 10 miles from Dunbridge.
Work on mastic joints is covered throughout SO51, for business premises of every kind. Close to Dunbridge, our area also takes in Mottisfont (1 mile north-east), Kimbridge (1 mile south-east), Stonymarsh (1 mile north-east), Carter's Clay (1 mile south-west) and Lockerley (1 mile west). Further afield, our area takes in Winchester (10 miles east), Eastleigh (10 miles south-east), Andover (13 miles north), Totton (8 miles south), Chandler's Ford (8 miles south-east) and Hedge End (13 miles south-east).
Near you in Dunbridge
Locally, jobs take us to sites close to The Bear And Ragged Staff Public House and the streets around them. There’s a railway station in Dunbridge itself: Mottisfont & Dunbridge station. Well-known places in the area include Romsey Community Hospital (3.9 miles south-east) and King Johns House (3.5 miles south-east).
What sets the cost
To price the job, we consider:
- How much existing material needs removing
- Any access equipment needed
- Specialist products, such as fire-rated or hygienic sealants
- Location, for remote and island sites
The specified product makes a difference, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site requirements come into it too.
Sending details for a quote
A good diagnosis starts with the right details. Let us know:
- The product your specification calls for
- Drawings or a marked-up plan, if available
- Anything awkward about access or site hours
- Photos of the joints, close up and from further back
For a fixed quote, call 01277 525 020 or use the quote form. Our quote form is another easy route.
Maintenance after handover
A few simple habits keep the new joints working:
- Mention RAMS, insurance or CSCS requirements up front
- Make mastic part of routine maintenance checks
- Avoid piecemeal callouts where you can
- 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.
Budgets are easier to plan when sealant is part of planned maintenance. We can quote buildings in priority order and work down the list.
From enquiry to sign-off
Tell us your site hours and access windows and we’ll plan around them. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. Jobs in and around smaller places like Dunbridge are usually planned as a single visit, so we ask for photos and rough sizes first. 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.
- 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
- Flag any permit to work we’ll need
- For older buildings, check the asbestos register before work
- Tell us your opening times and when work is allowed
Getting a fixed quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.
Related advice
FAQs: Dunbridge
Will you take on a block within reach of Mottisfont & Dunbridge station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we will quote and plan to suit.
Does your area include sites such as Home Farm Business Centre, near Dunbridge?
Yes. We cover Dunbridge and the area around it, including industrial estates, business parks and retail parks such as Home Farm Business Centre. Photos and a short description are enough for a first look.
Do you do block-wide mastic programmes?
Block-wide and estate programmes are common. The quote can be split however suits your budgeting.
When is resealing likely to be due?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
Can people stay in the building while you reseal?
Occupiers stay in the building throughout. If any flats or units need access, we’ll tell you in advance so it can be arranged.
How many days will you need on site?
It depends on the scope, though a typical visit typically takes a day or two for a single block, longer for an estate programme. For bigger or phased jobs, we’ll set out a timescale with the quote.
Can you seal joints high up on a block?
It depends on the building. How upper joints are reached is agreed before work is booked so the fixed quote reflects it.
Surface by surface
Tenement and older buildings
Some old mastics in pre-2000 buildings contain asbestos, so we check the asbestos register or survey first. If it’s suspected, work stops until it’s tested.
Commercial and mixed-use buildings
Commercial buildings have mastic at shopfronts, entrances and external joints. We work across portfolios on a planned basis.
Common problems we fix in Dunbridge
Poor preparation explains many failed joints. Without clean, sound faces and a primer where the product needs one it comes away from one face.
Any of the following is a good reason to get the joints checked over:
- Draught complaints from residents or tenants
- Movement joints with sealant missing
- Cracked, hardened mastic round windows on a block
- Damaged joints in communal entrances and corridors
If you’re responsible for a building such as Church of St Andrew, frame and door mastic needs the same attention as any other property.
Comparing quotes
- How long is the guarantee, and what does it include?
- Can the work be phased to keep areas open?
- What site paperwork they can supply
- Is the sealant right for the movement and the substrate?