Colden Common mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Colden Common and across Hampshire. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Worn sealant at communal door frames
- Patchy repairs in mismatched sealant
- Estate-wide sealant that is simply worn out
Mastic sealing for Colden Common sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Mastic sealing in Colden Common, done properly
Owners and agents normally inherit a building’s mastic rather than choose it and it slowly wears out: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow along with complaints. Most enquiries involve draughts at frames across a block and water getting in round frames after rain, across shopfronts below residential blocks, communal entrances and stairwells and balcony and threshold joints. A specialist sealant contractor works differently from a general builder: in Colden Common, that means joint design, primers and backing rod as standard.
In a smaller place such as Colden Common, landlords and agents tend to look after small blocks, flats over shops, sheltered housing and commercial units. Their window perimeters and external joints need renewing as the mastic ages.
The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Location
- Colden Common (SO21, SO50)
- Wider area
- Hampshire
- Guarantee
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Colden Common: questions and answers
Is Colden Common too far out for you?
Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Good photographs up front let us bring everything on the first visit.
Does your area include sites such as Wessex Business Park, near Colden Common?
Yes. We cover Colden Common and the area around it, including industrial estates, business parks and retail parks such as Wessex Business Park. Send details of the unit and the work through our quote form for a quick quote.
Do you work for managing agents and housing associations?
Yes, block and estate work is a core part of what we do. Buildings are scheduled in turn with dates agreed in advance.
Will you just go over the old sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
What’s the quickest route to a quote?
There are four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.
How many days will you need on site?
We plan the time on site around your programme and access. You will have an expected duration with the quote.
Can you plan resealing across several buildings?
Block-wide and estate programmes are common. The quote can be split however suits your budgeting.
Maintenance after handover
Once the work is signed off, these steps help:
- List the paperwork your organisation requires when you send details
- Prioritise elevations facing the weather
- Have the asbestos survey to hand for older buildings
- Check sealant joints during planned building inspections
Protect entrance and corridor joints from knocks where possible. Damage at low level is the most common reason communal joints fail early.
Leaks at window perimeters spoil finishes and can affect frames. Resealing early keeps the job small.
Leave it or put it right?
Looking at mastic during planned maintenance costs little. Leaving it until there’s a leak turns it into reactive work with less control over timing. Sealant hardens, cracks and loses grip with age, UV and movement. Replacing it before it fails keeps water out.
Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.
Why clients in Colden Common choose us
- Sealing commercial buildings since 2005
- Health and safety: CHAS accredited
- One number for every site we cover
- Clear, fixed quotes
Take a look at our cost guide and how we’re accredited.
Site staff or a sealant specialist?
Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong usually costs more in the end than doing them right.
When something else is needed
Honesty saves time and money. Fresh joints won’t solve:
- Failed window or door frames, which need a window contractor
- Misted or failed double-glazed units
- Leaks from above rather than through a joint
If in doubt, speak to us on 01277 525 020 or use the quote form and we will say what we think before you book.
Where we work in Colden Common
- Communal entrances and stairwells
- External wall and movement joints
- Balcony and threshold joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Communal kitchens and washrooms
Diagnose, treat, sign off
Before we leave any area, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. For a site in Colden Common, we plan so the whole job is done in one go where possible. Clear photographs and measurements help us bring the right products.
- First comes a look at the joints and, for older buildings, the asbestos records.
- A fixed quote covers the joints, products and order of work.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- Buildings are completed in turn.
Preparing the site
- Confirm the product named in the specification
- Flag any permit to work we’ll need
- Warn occupants and staff about the work
Request a quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to give us a call on 01277 525 020 or send photos by email with what you know.
Related advice
Mastic sealing in Colden Common: the local picture
Colden Common 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 63 miles from central London, Colden Common is within reach of the capital. 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.
Student accommodation around universities such as University of Winchester, 4.6 miles to the north of Colden Common, is typically managed block by block, which suits a planned mastic programme. If your remit includes a building such as Colden Common Primary School, frame and door mastic can be programmed for the holidays. Blocks of flats and mixed-use buildings often cluster around stations such as Shawford station, 1.9 miles to the north of Colden Common, and their window and balcony mastic tends to age at the same rate across a building.
Colden Common is about 2 miles north-east of Eastleigh, in Hampshire. If you are looking for mastic sealing in Colden Common, we can help, as we do across Hampshire. 723 places across Hampshire fall within our area, including Colden Common. Our Southampton page has more on work in that area.
Commercial sites across SO21 and SO50 are covered. We cover commercial and managed buildings on St Vigor Way, Ash Close and Birch Close. Nearby places we also cover include Brambridge (1 mile south-west), Nob's Crook (1 mile south-east), Lord's Wood (1 mile south-west), Highbridge (1 mile south-west) and Fisher's Pond (1 mile south-east) for mastic joints. Nearby towns on our patch include Winchester (4 miles north), Gosport (15 miles south-east), Fareham (11 miles south-east), Horndean (15 miles south-east), Totton (10 miles south-west) and Chandler's Ford (3 miles west).
Local landmarks in Colden Common
In Colden Common, that means premises near Thornden School, among other places. The nearest railway station is Shawford station, about 1.9 miles north of the centre. Nearby you will also find Wolvesey Castle (4.4 miles north) and Eastleigh Museum (2.4 miles south-west). The countryside around Colden Common includes Shawford Down and Twyford Down.
Towns and villages near Colden Common
What else we do in Colden Common
How the job changes by surface
Commercial and mixed-use buildings
Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. A planned programme suits multi-building portfolios.
External movement joints
Brickwork, blockwork and panel joints let a building move. Once that sealant goes, rain can reach the wall.