Mastic sealant contractors in Harestock
Planning work on a mastic joint in Harestock? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Patchy repairs in mismatched sealant
- No planned programme for sealant
- Draught complaints from residents or tenants
Mastic sealing for businesses in Harestock
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Should maintenance staff do it?
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
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 typically costs more in the end than doing them right.
Mastic sealing for commercial buildings in Harestock
Owners and agents typically inherit a building’s mastic rather than choose it and it slowly wears out: window perimeters, door frames, external joints and communal junctions all rely on it. Once it cracks, hardens or comes away, draughts and water find a way in, and occupiers start reporting it. The enquiries we see most involve brittle perimeter mastic across a building and water getting in round frames after rain, across balcony and threshold joints, shopfronts below residential blocks and external wall and movement joints. Whoever orders the work in Harestock, the brief is normally the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Places the size of Harestock normally have some housing association stock, small blocks and mixed-use buildings. The mastic around their frames and external joints ages like anywhere else.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Where
- Harestock (SO22)
- Region
- Hampshire
- Cover
- A 12-month guarantee
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Why act early in Harestock
Looking at mastic during planned maintenance costs little. Waiting until leaks appear means working under pressure with less control over timing. In a smaller place such as Harestock, getting a contractor back for a second visit takes time, so it’s worth dealing with every failing joint at once.
Pricing mastic joints depends on how many there are, their condition and the access, plus any specification you are working to. Ask us for a fixed quote.
What you get with us
- Work to your specification and the manufacturer’s guidance
- Standard and matched colours in many product ranges
- Fully insured
- A Constructionline member, so easy to vet
See how commercial sealant jobs are priced or our accreditations and insurance.
Looking after the joints
Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:
- Keep bins and bikes away from communal door frames
- Plan resealing building by building rather than complaint by complaint
- Keep a record of when each building was resealed
- Share the asbestos register when you send details
Add mastic joints to your cyclical inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away, and note the building and elevation.
One failed perimeter typically means others on the same building are close, so it pays to look at the whole elevation. Doing them together saves going back again and again.
Surface by surface
Window and door perimeters on blocks
Blocks have a mix of frame materials, so the grade we pick has to bond to frame and wall alike. We’ll confirm the colours available for the specified product.
External movement joints
External movement joints take up expansion and contraction. Once that sealant goes, rain can reach the wall.
Block-wide mastic in Harestock
Rainfall across the South East, Harestock included, is lower than in many parts of the UK. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are typically where frame mastic ages first. Harestock lies roughly 61 miles out from central London. Within reach of London, blocks run by agents and associations are common around stations; their frame mastic often ages block-wide.
Buildings close to stations like Winchester station (to the south-east of Harestock) are often flats over shops, with frame mastic to keep sound. If you own or manage units on a site such as Wykeham Industrial Estate (1.8 miles south-east of Harestock), failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Harestock is about 2 miles north-west of Winchester, in Hampshire. Across the SO22 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Across Hampshire, 723 places are covered, Harestock among them. We also cover Southampton, around 12 miles from Harestock.
Postcode districts covered here: SO22. Streets here include Kennel Lane, Burley Road and Stoney Lane, and sites on any of them can send details for a fixed quote. Just outside Harestock, we also work in Littleton (1 mile north-west), Weeke (1 mile south), Abbotts Barton (1 mile south-east), Hyde (1 mile south-east) and Headbourne Worthy (1 mile north-east). Nearby towns on our patch include Eastleigh (8 miles south), Andover (11 miles north-west), Totton (14 miles south-west), Chandler's Ford (7 miles south), Hedge End (12 miles south) and Romsey (9 miles south-west).
Near you in Harestock
Recent enquiries here include premises near Henry Beaufort School and The Running Horse pub and the streets around them. Harestock’s nearest station is Winchester station, roughly 1.2 miles south-east of the centre. Other landmarks nearby include Royal Observer Corps Museum (1.1 miles south-east) and Royal Hampshire County Hospital (1.5 miles south). Not far away are Twyford Down and Winnall Moors.
Do you need mastic sealing in Harestock?
Occasionally the substrate fails, not the sealant for instance where render or brick edges crumble. We’ll tell you if the joint edges need repairing before resealing.
Clients typically get in touch after noticing something like this:
- Mastic failing across several blocks on an estate
- Worn sealant at communal door frames
- Failed external movement joints
- Cracked, hardened mastic round windows on a block
Churches, halls and community buildings such as Saint Barnabas are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.
Comparing quotes
- Health and safety accreditation such as CHAS
- What level of public liability insurance do they hold?
- Whether primer will be used where the manufacturer specifies it
- Is the sealant right for the movement and the substrate?
Towns and villages near Harestock
What else we do in Harestock
On site: what to expect
At the end of each section, the masking comes off, the area is cleaned and every joint is checked. If an area should be left alone while the sealant cures, we say how long and put signs out. Several jobs near Harestock can be grouped on one trip. Mention the building’s opening times and we’ll work within them.
- We check the asbestos register for older buildings and look at the joints.
- A fixed quote covers the joints, products and order of work.
- We strip out the old sealant.
- Joint faces are cleaned, backed and resealed.
- Buildings are completed in turn.
Before we start on site
- Move anything stored against the joints
- Point out parking and an unloading spot
- Point out any areas we must not close
Ask for a quote
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, speak to us on 01277 525 020 or email us.
Related advice
Common questions from Harestock clients
Will you take on work at estates like Wykeham Industrial Estate, close to Harestock?
Yes, sites like Wykeham Industrial Estate are within our area, along with the rest of Harestock. Send details of the unit and the work through our quote form for a quick quote.
Is Harestock off your patch?
Not at all: smaller places are covered as well as towns. We work across Greater London and the South East. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.
Do you work to architects’ specifications?
Yes. Include it with the drawings when you ask for a quote, and we’ll price the work to it, flagging anything that needs clarifying.
Do you work for managing agents and housing associations?
We do. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
How long do sealant joints last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.
Will you quote for a small job?
Small jobs are welcome alongside larger packages. Send details for a fixed quote.
How much does the work cost?
There isn’t a price list, as every site differs. With photos or drawings, we can give you a fixed quote.