Construction and new-build mastic in Gosport, Hampshire
Sealant work in Gosport for main contractors, managing agents and facilities managers: mastic packages for new-build and refurbishment projects, quoted at a fixed price.
- A mastic package split between trades with no clear owner
- Cracks opening in caulked internal joints
- Frame gaps too wide for sealant alone
Construction mastic for businesses in Gosport
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Honest limits
Part of a good diagnosis is knowing where sealant stops. You’ll hear from us if the cause turns out to be any of the following:
- Damage to finishes by other trades after we’ve sealed
- Oversized gaps that need packing or adjustment by others
- Faulty frames rather than failed sealant
If you’re not sure, just give us a call on 01277 525 020 or email us and we’ll give you a straight answer before you book.
Where we work in Gosport
- Window and door perimeters
- Floor and skirting junctions
- Brick and block movement joints
- Sanitary and kitchen joints
- Internal decorators’ caulk
- Cladding and panel joints
Construction mastic in Gosport, done properly
Getting a subcontractor through site induction should be simple. We are a Constructionline member and CHAS accredited, and every applicator holds a CSCS card. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. If you have window and door perimeters that won’t pass inspection and frame gaps too wide for sealant alone, we can help, whatever the surface. Looking for mastic applicators who cover Gosport? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Construction in a town such as Gosport is often smaller schemes: a few new flats, a school extension, a refurbished unit. A mastic package on a smaller site still needs the same care at window perimeters and facade joints.
We stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant.
- Where
- Gosport (PO12, PO13)
- Wider area
- Hampshire
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
FAQs: Gosport
Can you work around term dates at a campus such as University of Portsmouth - North Zone?
Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. Let us know which documents your site asks for, and we will confirm them alongside the quote.
Is hospital work, at somewhere like Gosport War Memorial Hospital, something you do?
Yes, hospitals are one of the sectors we cover. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Can you handle several sites?
Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.
Do you have public liability insurance?
Yes. Mastic Doctor is fully insured, public liability included.
What happens if the weather stops external sealing?
Weather matters for external sealing: each sealant has a temperature range, and the joint must be dry. External work is sequenced with some flexibility.
Can you quote from photographs?
That depends on the size and complexity of the job. Straightforward work can often be priced from photos and measurements, and bigger or more complex jobs typically get a visit.
Do you cover Gosport?
Yes. Sites across Gosport are covered, and the same phone number covers every area.
What affects the price in Gosport
We price every job individually. The main factors are:
- Site requirements such as inductions and permits
- Whether old sealant has to be cut out first
- Distance, for remote addresses
- The total length or number of joints
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we’ll explain how it’s made up.
Sending details for a quote
Good information means a firmer quote. Helpful details to send:
- Whether an asbestos survey exists
- Whether the building will be occupied during the work
- When you need the work done
- Where the site is, with the postcode
Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. If you have questions first, phone 01277 525 020 or email drawings and photos.
Aftercare for building managers
Problems stay small when the joints are checked regularly. In particular:
- Record the products used in the O&M file
- Get the mastic subcontractor involved early in the programme
- Protect sealed areas from following trades
- Keep scrapers and abrasive pads off new beads
The package carries our 12-month guarantee for workmanship. The guarantee covers how we sealed, not later damage by other trades, so protecting sealed areas matters.
Snag items left to the last week put handover at risk. A planned close-out through each area as it completes keeps the list short and keeps handover on track.
Commercial clients in Gosport
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Gosport can form part of a wider programme across Hampshire.
On site: what to expect
Working in a building that stays open takes some planning. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. In a town such as Gosport, most jobs are single buildings. Your photos, drawings or a site visit come first, followed by a fixed quote.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- The sequence is agreed with the site manager.
- Plots or floors are sealed as they’re handed over.
- Every joint is cleaned, set to depth and sealed with the specified product.
- After snagging, the work is handed over under our 12-month guarantee.
Before we start on site
- Point out parking and an unloading spot
- Share your working hours and any access restrictions
- Tell us what induction or permit system the site runs
Request a quote
Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. The easiest way is to call the office on 01277 525 020 or send photos by email.
Related advice
Surface by surface
Bathrooms, en suites and washrooms
Across a block of flats or a hotel, sanitary sealing is repeated in every room. One applicator team gives the same finish everywhere, plot by plot or floor by floor.
Snagging before handover
The last pass before handover is where mastic snags are cleared. Snags are cleared room by room.
Towns and villages near Gosport
More services for Gosport
New build and refits around Gosport
Gosport is within about 2 miles of the coast. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, and the sealant, primer and backing need choosing with that in mind. Gosport is in the South East, one of the UK’s drier regions. Winter mornings still bring frost and condensation on frames and panels, so the external programme keeps a little slack.
Units on estates such as Brockhurst Gate Retail Park, 0.9 miles to the north of Gosport, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. Hotel extensions and refits, at places such as Railway Hotel, 1.1 miles to the south-east of Gosport, usually run between busy periods, so the sealing is squeezed into short windows. New wings at hospitals like Gosport War Memorial Hospital (to the south of Gosport) bring long runs of window and panel joints to seal.
Gosport is in Hampshire. Across the PO12 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Gosport is one of 723 places in Hampshire on our list.
If you need construction mastic in PO12 and PO13, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. We cover commercial and managed buildings on Station Road, St Johns Square and Cockleshell Square. Main routes into Gosport include the A32 and B3333, useful when we plan access and materials. Nearby places we also cover include Forton (1 mile south-east), Elson (1 mile north), Priddy's Hard (1 mile east), Bridgemary (1 mile north-west) and Rowner (2 miles north-west) for mastic packages. Bigger towns within reach include Havant (8 miles north-east), Eastleigh (14 miles north-west), Fareham (4 miles north-west), Horndean (9 miles north-east), Hedge End (10 miles north-west) and Waterlooville (8 miles north-east). Gosport is one of the busier places in Hampshire, and its commercial and public buildings are all within our area.
Landmarks near Gosport
Around Gosport, our work takes us to commercial buildings near St Vincent College, Brune Park Community School and Queen's Head pub, among other places. Gosport’s nearest station is Portsmouth Harbour station, roughly 2 miles east of the centre. Nearby you will also find Search (1.3 miles south-east) and Gosport War Memorial Hospital (0.8 miles south). For a walk, there’s Portsdown Hill and West of the River Alver.