Itchen mastic sealing
Mastic sealing for building owners, managing agents and housing associations across Itchen, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- No planned programme for sealant
- The same joint failures repeated across a portfolio
- Patchy repairs in mismatched sealant
Mastic sealing across Itchen
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing for commercial buildings in Itchen
Owners and agents normally 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 along with complaints. If you are dealing with leaks at window and door perimeters and open joints in brickwork or panels, we can put it right, on shopfronts below residential blocks, balcony and threshold joints and window and door perimeters on blocks alike. One point of contact handles commercial sealant work in Itchen from the first photos to the final walk-round, for single jobs and planned programmes alike.
For landlords and associations with stock in and around Itchen, grouping buildings into one visit saves travel. Send the addresses and photographs and we will quote for all of them together.
Whoever the client is, the cover is the same: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Location
- Itchen (SO19, SO14)
- Region
- Southampton
- Cover
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Common questions from Itchen clients
Is a smaller place like Itchen outside your area?
Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.
Can work in a care setting near Itchen go ahead while residents are there?
Yes. Care settings are planned area by area, at times agreed with the home. Tell us about any infection-control or safeguarding requirements and we’ll work to them.
What about access for upper-floor joints?
We talk through access for each building when we quote. Tell us the number of storeys and whether scaffold or other access is planned, and we’ll tell you how we’d approach it.
Can you work to our specification?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.
What will the job cost?
There isn’t a price list, as every site differs. Send photographs or drawings and we will price it at a fixed figure.
How do I request a quote?
You can use the quote form on this site; alternatively, call the office on 01277 525 020 or use the quote form. Include photos or drawings if you have them.
Will you come and look before quoting?
Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit.
Our process
Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. For a job in Itchen, the main thing is a clear picture of the work, so send photographs 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.
- Dates and areas are agreed so occupiers can be told.
- 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.
Before we start on site
- Explain the parking and delivery arrangements
- Tell us what induction or permit system the site runs
- Tell us which areas need to stay in use
Quotes
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Related advice
Keeping the joints sound
Problems stay small when the joints are checked regularly. Specifically:
- List the paperwork your organisation requires when you send details
- Include mastic in your cyclical inspections
- Encourage occupiers to report problems at frames
- Log resealing dates block by block
If a joint we sealed fails within 12 months, tell us and we’ll look at it. Beyond that, routine checks spot the next round of repairs.
Planned resealing is easier to budget than emergency repairs. We can quote buildings in priority order so spending is spread.
Owners, agents and contractors
We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Itchen. One quote can cover more than one site, which keeps the paperwork simple.
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
Frames, entrances and external joints in Itchen
The sea is no more than about 1 mile from Itchen. On buildings near the shore, the side facing the weather normally needs its mastic renewed first, and they deserve more regular inspection. There are seven care or nursing homes within about 2 miles of Itchen. Owners of care premises can bring window and door mastic into a phased programme planned around the home.
For agents with blocks near Woolston station, which lies south-west of Itchen, a block-wide mastic programme deals with frames, balconies and entrances in one go. Site managers at schools like Ludlow Junior School can fit frame mastic into the summer works. Owners of student blocks near Solent University, 1.4 miles west of Itchen, can schedule frame and external mastic for the summer vacation.
Itchen is about 2 miles south-east of Southampton, in Southampton. Any commercial site in Itchen is covered. We work across 30 places in Southampton, from busy centres to rural villages.
We cover the SO19 and SO14 postcode districts for mastic joints. We cover commercial and managed buildings on Sea Road, Oak Road and West Road. Being close to the A3025, Itchen is straightforward for us to reach. If your building is just outside Itchen, we cover Peartree Green (1 mile north-west), Northam (1 mile north-west), Sholing (1 mile east), Bitterne (1 mile north-east) and St Mary's (1 mile west). Bigger towns within reach include Shirley (3 miles north-west), Regents Park (3 miles west), Maybush (4 miles north-west), Coxford (4 miles north-west), Freemantle (3 miles west) and Lordswood (4 miles north-west). As one of the bigger centres in Southampton, Itchen has a broad mix of commercial, public and industrial buildings, and we cover them all.
Around Itchen
We work on buildings around Houndwell Park, Woolston School and Oasis Academy Sholing, among other places. There’s a railway station in Itchen itself: Woolston station. Well-known places in the area include Bitterne Local History Society Heritage And Research Centre (0.9 miles north) and Marlands Shopping Centre (1.6 miles west). Not far away are Netley Common.
Doing it in-house
What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
When something else is needed
We check first that sealant really is the fix. It isn’t the answer for:
- Masonry that has broken away beside the joint
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Frames that are rotten, warped or broken
Not sure which it is? You can speak to us on 01277 525 020 or email the details over and we will tell you honestly.
What we seal
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- External wall and movement joints
- Balcony and threshold joints
Towns and villages near Itchen
Also in Itchen
Why it’s worth doing now in Itchen
Failed perimeter mastic lets cold air in around frames and the windows typically get the blame. In many cases, new perimeter sealant deals with it where the frames themselves are sound. Over time, UV, weather and movement wear any sealant out. Renewing it in good time keeps the building weathertight.
A quote for mastic joints depends on quantities, condition and access, and any specification that applies. Ask us for a fixed quote.
Why clients in Itchen choose us
- Coloured sealants to suit the setting, where available
- Colour options checked against the specified product
- Health and safety: CHAS accredited
- A Constructionline member, so easy to vet
Read what affects the cost or our accreditations.