Mastic contractors in Portsmouth Point
Work needed on a mastic package in Portsmouth Point? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Different trades sealing to different standards
- New external sealant already peeling away
- Cracks opening in caulked internal joints
Construction mastic for Portsmouth Point sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Construction mastic for commercial buildings in Portsmouth Point
Refurbishment work needs a slightly different approach from new build. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone. After that, the joints are prepared and sealed to the specification. If you have perimeter gaps outside the sealant’s range and existing joints on a refurb that need cutting out and resealing, we can help, whatever the surface. Most enquiries from Portsmouth Point start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
In a smaller place such as Portsmouth Point, construction tends to mean small housing schemes, conversions and extensions to community buildings. Small schemes still need window perimeters, facade joints and internal sealant done to the specification.
Every job we finish is backed by a 12-month workmanship guarantee. If our installation lets you down in that time, we return and fix it.
- Where
- Portsmouth Point (PO1, PO5, PO12)
- Region
- Portsmouth
- Cover
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Questions we’re asked in Portsmouth Point
Is hospital work, at somewhere like Gosport War Memorial Hospital, something you do?
Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.
Do you cover business parks and estates near Portsmouth Point, such as Cranbourne Industrial Estate?
Yes, sites like Cranbourne Industrial Estate are within our area, along with the rest of Portsmouth Point. Photos and a short description are enough for a first look.
Do you do fire-rated sealing on new builds?
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested details. The design and sign-off belong to the designer, fire engineer or building control.
Do you need to see the site first?
Many jobs can be quoted from photos, drawings or a joint schedule. Where they aren’t, we arrange a site visit.
Which sealant will you use?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
What joints do you seal on a new build?
External perimeters and movement joints, internal caulking where specified, sanitary and kitchen joints, plus snagging, all priced as one package.
What will the job cost?
There isn’t a price list, because every site is different. Send photographs or drawings and we’ll price it at a fixed figure.
Keeping the joints sound
Regular inspection catches problems early. Specifically:
- Brief the final clean team to avoid blades near sealant
- Use the product the specification names
- Keep finished joints away from paint, plaster and scrapers
- Get the mastic subcontractor involved early in the programme
Any damage after we’ve finished should go on the snag list right away. Snags can be picked up in a planned close-out visit as agreed in the quote.
Oversized gaps are a problem better caught early. Sealant stretched over an oversized gap won’t last, so the installer needs to correct it first. We flag them as soon as we see them.
Mastic packages on Portsmouth Point sites
Portsmouth Point sits close to the coast, within about 1 mile. 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. Portsmouth Point is in the South East, one of the UK’s drier regions. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so external mastic is timed for workable conditions and agreed with the site manager.
University estates such as University of Portsmouth - North Zone (to the north-east of Portsmouth Point) tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. Hotel extensions and refits, at places such as The Dolphin Hotel (less than half a mile south-east of Portsmouth Point), typically run between busy periods, so the sealing is squeezed into short windows.
Portsmouth Point is about 2 miles west of Southsea, in Portsmouth. Looking for construction mastic in Portsmouth Point? We can help, as we do across Portsmouth. Portsmouth Point is one of 19 places we cover in Portsmouth.
We cover the PO1, PO5 and PO12 postcode districts for mastic packages. For a building on Park Road, Nobbs Lane and Bath Square or nearby, we can quote for mastic packages. Close to Portsmouth Point, our area also takes in Portsea (1 mile north), Clayhall (1 mile south-west), Haslar (1 mile south-west), Alverstoke (2 miles south-west) and Privett (2 miles west). Bigger towns within reach include Hilsea (3 miles north-east), Wymering (4 miles north), Paulsgrove (4 miles north), Cosham (4 miles north-east), Drayton (5 miles north-east) and Farlington (5 miles north-east).
Landmarks near Portsmouth Point
We work on buildings around Charter Academy, Portsmouth Grammar School and Bridge Tavern. There’s a railway station in Portsmouth Point itself: Portsmouth Harbour station. Well-known places in the area include Southsea Castle (1.2 miles south-east) and Portsmouth Museum And Art Gallery (less than half a mile east). Open spaces near Portsmouth Point include Portsdown Hill and Milton Locks.
How the job changes by surface
Snagging before handover
Damaged, missed or untidy joints make up most snag lists. Snagging can be included or priced separately.
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. A kitchen-suitable sealant is used.
Places near Portsmouth Point
More services for Portsmouth Point
Common problems we fix in Portsmouth Point
Dust is the enemy of adhesion on a construction site. Dust, film adhesive, damp and grease on the joint faces prevent a proper bond so faces get cleaned, and primer goes on wherever the maker specifies, even on new work.
Any of the following is a good reason to get the joints checked over:
- Internal caulk splitting as the building dries out
- Perimeter gaps outside the sealant’s range
- Bath and shower joints scraped during the final clean
- Frame perimeters left unsealed or poorly sealed
New wings at hospitals like Gosport War Memorial Hospital, 1.8 miles west of Portsmouth Point, bring long runs of window and panel joints to seal.
What your quote should include
- Their plan for phasing and protecting the area
- Is the sealant right for the movement and the substrate?
- The terms of the workmanship guarantee
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
When it isn’t the sealant
Being straight saves everyone time. Fresh joints won’t solve:
- Damage to finishes by other trades after we have sealed
- Glazing units that are cracked or misted
- Joint design decisions that belong to the architect or engineer
Not sure which it is? You can phone 01277 525 020 or email a schedule or drawings and we’ll tell you honestly.
What we seal
- Cladding and panel joints
- Brick and block movement joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Sanitary and kitchen joints
- Window and door perimeters
Building owners, agents and FMs in Portsmouth Point
When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.
Diagnose, treat, sign off
A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. On site, the work typically takes as long as the agreed sequence needs, which comes down to joint lengths, access and handover dates, and our waste is bagged and taken away as we go. If neighbouring businesses or buildings around Portsmouth Point need work too, visits can be combined. Mention the building’s opening times and we will work within them.
- First we look at the scope on site or from drawings.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Problems we find, such as oversized gaps, are raised right away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
Before we start on site
- Let us know about inductions and permits
- Share the asbestos register for older buildings
- Agree which areas must stay open
Quotes
For a fixed quote, speak to us on 01277 525 020 or send photos by email with the site address and an outline of the work. You can also send details through our quote form.