Mastic sealant contractors in Dunsbury
Commercial sealant work in Dunsbury for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.
- Complaints coming in block by block
- Patchy repairs in mismatched sealant
- Communal area joints that look neglected
Mastic sealing for Dunsbury sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our mastic sealing in Dunsbury
Owners and agents usually inherit a building’s mastic rather than choose it, and it ages quietly: it sits round windows and doors, along external joints and through communal areas. When it hardens, splits or pulls away, water and draughts follow, and occupiers start reporting it. We work on balcony and threshold joints, external wall and movement joints and communal kitchens and washrooms, and the usual reasons a site gets in touch are no planned programme for sealant and draught complaints from residents or tenants. Facilities teams, main contractors and managing agents in Dunsbury tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
In and around smaller places like Dunsbury, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Frame and wall-joint mastic on all of them ages and hardens.
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.
- Where
- Dunsbury (PO30)
- Wider area
- Isle of Wight
- Guarantee
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Work for main contractors and building owners
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
Building owners and managing agents use us on everything from one building to a spread of sites around Dunsbury. One quote can cover more than one site, so there’s one set of paperwork to deal with.
What the job involves on each surface
External movement joints
Failed sealant is removed, backing rod inserted to control depth and the joint resealed with a grade whose movement class fits.
Window and door perimeters on blocks
Perimeter joints on blocks are best done elevation by elevation or block by block. Access is agreed with you before the quote is fixed.
Why it’s worth doing now in Dunsbury
Failed perimeter mastic lets cold air in around frames and the windows typically get the blame. Resealing the perimeters is often the simpler fix when the frames themselves are sound. Around Dunsbury, it’s better to renew all the failing joints at once, rather than one at a time. Photos of every joint help us quote for the whole job.
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.
Why appoint us
- Sealing commercial buildings since 2005
- A Constructionline member, so easy to vet
- Work carried out by CSCS-carded applicators
- Failed material removed, not covered up
Take a look at our cost guide and our accreditations and insurance.
Blocks and managed buildings in Dunsbury
Dunsbury lies within about 1 mile of the sea. For owners and agents with buildings near the sea, exposed elevations are where frame mastic fails first; plan inspections around that. Rainfall across the South East, Dunsbury included, is lower than in many parts of the UK. Outside work still depends on dry joints, and the sunniest, most exposed sides of a building normally need attention first.
With historic buildings such as Mottistone Manor (to the east of Dunsbury) in the wider area, owners of older properties around Dunsbury should expect mastic to need a product that suits old masonry.
Dunsbury is about 7 miles south-west of Newport, in the Isle of Wight. Looking for mastic sealing in Dunsbury? We can help. Our the Isle of Wight coverage takes in 125 places, from busy centres to rural villages. We also cover Southampton, around 18 miles from Dunsbury.
Business premises anywhere in PO30 are within our area for mastic joints. Sites close to Dunsbury are covered too, including Brook (1 mile south), Hulverstone (1 mile south-east), Brookgreen (1 mile south-east), Shalcombe (1 mile north-east) and Chilton Green (2 miles south-east). Nearby towns on our patch include Newport (7 miles north-east), Ryde (14 miles east), Cowes (9 miles north-east), Sandown (13 miles east), Shanklin (12 miles east) and Ventnor (12 miles east). Where a site is remote or on an island, travel and materials need planning ahead.
Around Dunsbury
A little further out are Yarmouth Castle (3.9 miles north-west) and Calbourne Water Mill And Rural Museum (2.3 miles north-east). Open spaces near Dunsbury include Westover Down.
Towns and villages near Dunsbury
What else we do in Dunsbury
Common problems we fix in Dunsbury
The edges of the material itself sometimes break away, such as crumbling render, brick arrises or frame edges. If the edges are unsound, we say so before quoting the sealing.
Most enquiries start with something like this:
- Damp patches beside frames
- Cracked, hardened mastic round windows on a block
- Communal area joints that look neglected
- Draughts at frames across a block
If you are responsible for a building such as St. Mary's Church, frame and door mastic needs the same attention as any other property.
Before you book anyone
- Will failed sealant be removed rather than covered?
- What level of public liability insurance do they hold?
- How long is the guarantee, and what does it include?
- How joint depth will be controlled
What affects the price in Dunsbury
We price every job individually. The main factors are:
- Backing rod, priming and other preparation
- Access and working height
- Working within restricted access windows
- Which sealant the job calls for
There’s no price list, since every building and every scope is different. For a fixed figure, call for a quote.
What to include in your enquiry
Diagnosis starts before we arrive. Let us know:
- The product your specification calls for
- Where the site is, with the postcode
- A wide shot and a close-up of the area
- Your programme or deadline
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, call 01277 525 020 or email a schedule or drawings.
Diagnose, treat, sign off
We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. For work around Dunsbury, we aim to finish in one visit, so photographs and measurements up front really help. That way the right products come on the day.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
Preparing the site
- Send any specification or drawings in advance
- Let building users know which areas are affected
- Agree which areas must stay open
Request a quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.
Read more
Common questions from Dunsbury clients
Does the sea air around Dunsbury change the choice of sealant?
It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. We check the specified product suits the exposure and pay close attention to preparation.
Is Dunsbury off your patch?
No. Places such as Dunsbury are covered as much as the big towns. We cover Greater London and the counties of the South East. Send photographs and a list of what needs doing, and we will plan the job to need as few trips as possible.
Can you plan resealing across several buildings?
Yes, planned programmes suit estates and portfolios. The quote can be split however suits your budgeting.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.
How many days will you need on site?
The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.
Do you check for asbestos in old sealant?
We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.
How do you reach windows on upper floors?
It depends on the building. We agree access with you at quote stage so there are no surprises.