Thorney Island mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Thorney Island. CHAS accredited and fully insured, with a 12-month guarantee.
- Movement joints with sealant missing
- Cracked, hardened mastic round windows on a block
- Damp patches beside frames
Mastic sealing in Thorney Island
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Work for main contractors and building owners
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
For main contractors, we work as the sealant subcontractor. Programme, specification and site rules come first.
Mastic sealing for commercial buildings in Thorney Island
We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. Many prefer a planned programme to one-off visits, with each block quoted and scheduled in turn. If you have damaged joints in communal entrances and corridors and water getting in round frames after rain, we can put it right, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, in Thorney Island it comes down to the same thing: the right product in a properly prepared joint.
Around smaller places like Thorney Island, older walls fitted with newer windows are a familiar sight. Perimeter mastic there has to grip an uneven face and suit the building’s character.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Thorney Island (PO10)
- Region
- West Sussex
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Towns and villages near Thorney Island
More services for Thorney Island
Mastic sealing around Thorney Island: points for this area
With the shore within about 1 mile, Thorney Island counts as a coastal location. For owners and agents with buildings near the sea, exposed elevations are where frame mastic fails first. The 2 miles around Thorney Island include two care or nursing homes. Care home owners need frame and external mastic kept sound without unsettling residents.
Landlords with units on estates such as Finchwood Farm Industrial Estate (to the south-west of Thorney Island) can bring frame, door and external mastic across several units into one programme. If you are responsible for a building such as The Parish Church of St Nicholas, frame and door mastic needs the same attention as any other property. For agents with blocks near Southbourne station, 1.8 miles to the north-east of Thorney Island, a block-wide mastic programme deals with frames, balconies and entrances in one go.
Thorney Island is about 4 miles south-east of Havant, in West Sussex. Any commercial site in Thorney Island is covered, whether it’s a single job or part of a planned programme. We work across 373 places in West Sussex, large and small. There’s a separate page for Portsmouth, roughly 7 miles from Thorney Island.
Anyone looking for mastic sealing in PO10 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Among the streets we cover are Hunter Road, Emsworth Road and Spartan Close. Just outside Thorney Island, we also work in West Thorney (1 mile south-east), North Hayling (1 mile west), Tye (1 mile south-west), Northney (1 mile west) and Emsworth (2 miles north). Bigger towns within reach include Bognor Regis (11 miles east), Chichester (7 miles east), Selsey (9 miles south-east), Portfield (7 miles east), Yapton (14 miles east) and East Wittering (5 miles south-east).
Near you in Thorney Island
Recent enquiries here include premises near Bourne Community College and Eames Farm, among other places. The closest station to Thorney Island is Southbourne station, roughly 1.8 miles north-east of the centre. Nearby you’ll also find Havant War Memorial Hospital (3.2 miles north-west) and Emsworth Museum (1.6 miles north). Open spaces near Thorney Island include Nutborne Marshes.
Keeping the joints sound
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:
- Protect low-level joints in entrances
- Group repairs into a planned programme
- Share the asbestos register when you send details
- Prioritise elevations facing the weather
Include sealant in planned building inspections. Check for splits, open joints, brittle mastic and lifting edges and record where they are.
Water getting in round frames can damage plaster, decoration and the frames themselves. Resealing early keeps the job small.
What sets the cost
A fixed quote reflects the actual work. It takes account of:
- Access and working height
- The size and state of each joint
- Which sealant the job calls for
- How much there is to seal
A quote for mastic joints depends on quantities, condition and access, plus any specification you’re working to. Ask us for a fixed quote.
Sending details for a quote
We can often quote from photographs and a few details. It helps to include:
- Where the site is, with the postcode
- Whether an asbestos survey exists
- Anything awkward about access or site hours
- Whether the building will be occupied during the work
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, phone 01277 525 020 or send details through our quote form.
From enquiry to sign-off
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. The work itself typically takes anything from a day to a few weeks, depending on the number of buildings and joints, and we clear our waste as we work. For a building around Thorney Island, tell us how to find it and who will meet us. Send that with the details and we’ll confirm the plan with the quote.
- First we look at the mastic on each building and note what needs replacing.
- We send a fixed quote that sets out the joints, the products and the programme.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- Failed mastic is removed and the faces taken back to sound, dry material.
- Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Before we start on site
- Send your site hours and access windows
- Send any specification or drawings in advance
- Point out parking and an unloading spot
Get a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. For smaller jobs, photos and a description will do.
Related advice
Common questions from Thorney Island clients
Our building in Thorney Island is near the coast: does that change the sealant?
It can. Coastal exposure works external joints harder than inland weather. We check the specified product suits the exposure and pay close attention to preparation.
Do you cover business parks and estates near Thorney Island, such as Finchwood Farm Industrial Estate?
Yes. Estates, retail parks and business parks around Thorney Island, Finchwood Farm Industrial Estate among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.
How much does the work cost?
It depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we will price it properly.
Can you follow the specification on our project?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.
What about access for upper-floor joints?
Access is discussed and agreed before the quote is fixed. Tell us the building height and any access already in place, and we’ll tell you how we’d approach it.
Can you take on resealing for a block portfolio?
Yes. 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.
Can you send RAMS and CSCS details before starting?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We hold CHAS accreditation and Constructionline membership.
What we can’t put right
Before quoting, we check that sealant is the right answer. It won’t put right:
- Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
- Water coming in from the roof or rainwater goods
- Glazing that needs replacing
If in doubt, ring 01277 525 020 or email drawings and photos and we’ll say what we think before you book.
Surfaces we seal
- Communal kitchens and washrooms
- External wall and movement joints
- Communal entrances and stairwells
- Balcony and threshold joints
- Window and door perimeters on blocks
- Shopfronts below residential blocks
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.
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.