Construction and new-build mastic in Clayhall, Hampshire
Mastic packages for new-build and refurbishment projects throughout Clayhall and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Bath and shower joints scraped during the final clean
- Old sealant on a refurbishment that needs stripping before new work
- Oversized or tapered gaps around new frames
Construction mastic near Clayhall
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Clayhall: questions and answers
Can you take on a job at a hospital such as Gosport War Memorial Hospital?
Yes. We work in healthcare settings as well as offices and schools. Work is phased so departments keep running, under the site’s own rules.
Does the sea air around Clayhall change the choice of sealant?
It can. Coastal exposure works external joints harder than inland weather. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.
Do you work to architects’ specifications?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.
Is colour matching possible?
It depends on the product specified. Some ranges are wide, others limited, so we’ll confirm the colours available for the specified product with the quote.
Do you use the sealant named in the specification?
The specified product is what goes in. Any suggested alternative is put to you before anything changes.
What accreditations do you hold?
We’re CHAS accredited and a Constructionline member, and our applicators hold CSCS cards. We’re fully insured for public liability.
Is it fine to apply new sealant on top of old?
No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Construction mastic in Clayhall
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 and the asbestos survey is checked first on older stock. After that, the joints are prepared and sealed to the specification. We work on brick and block movement joints, sanitary and kitchen joints and floor and skirting junctions, and what we’re called in for most is caulk cracking where joints are moving more than expected and frame gaps too wide for sealant alone. Most enquiries from Clayhall 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.
On a small site around Clayhall, the mastic is best done in the fewest visits we can manage. Tell us when scaffold comes down and when decoration finishes, and we’ll plan around those stages.
The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we’re clear about what is covered before work starts.
- Where
- Clayhall (PO12)
- Wider area
- Hampshire
- Guarantee
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Towns and villages near Clayhall
More services for Clayhall
How the quote is worked out
To price the job, we consider:
- Site requirements such as inductions and permits
- Quantities, in metres or numbers
- Access and working height
- Phasing around occupants
Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
Details that help us quote
Good information means a firmer quote. Helpful details to send:
- Photos of the joints, close up and from further back
- The product your specification calls for
- Whether the building will be occupied during the work
- Asbestos survey details if the building is older
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call 01277 525 020 or send photos by email with what you know.
Mastic packages on Clayhall sites
Clayhall lies within about 1 mile of the sea. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, so joint design, primers and product choice deserve extra care. Clayhall is in the South East, one of the UK’s drier regions. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, which is why external dates are agreed with the site manager.
Work at a hotel such as Anglesey Hotel (to the west of Clayhall) tends to be programmed around bookings, mastic included. For a contractor working at a hospital such as Gosport War Memorial Hospital (1 mile north-west of Clayhall), perimeter and facade sealing is planned around patients and deliveries.
Clayhall is about 2 miles south-east of Gosport, in Hampshire. We cover commercial sites throughout Clayhall, for single jobs and planned programmes alike. Our Hampshire coverage takes in 723 places, from busy centres to rural villages.
We take on mastic packages across the PO12 postcode area, for business premises of every kind. Streets here include The Lane, Old Road and Fort Road. Sites close to Clayhall are covered too, including Haslar (1 mile south-east), Alverstoke (1 mile west), Portsmouth Point (1 mile north-east), Privett (1 mile north-west) and Portsea (2 miles north-east). Nearby towns on our patch include Havant (8 miles north-east), Fareham (6 miles north-west), Horndean (10 miles north-east), Hedge End (12 miles north-west), Waterlooville (8 miles north-east) and Purbrook (7 miles north-east).
Landmarks near Clayhall
Around Clayhall, our work takes us to commercial buildings near Bay House School, The Fighting Cocks pub and St Vincent College and the streets around them. The nearest railway station is Portsmouth Harbour station, roughly 1.4 miles north-east. Nearby you’ll also find Gosport War Memorial Hospital (1 mile north-west) and Search (0.9 miles north). Not far away are West of the River Alver.
How a job runs
Before any cutting starts, the area is protected: masking tape along the joint edges and sheeting over anything nearby. On site, the work normally takes whatever the programme allows, since the work follows the trades as areas are released, and we clear our waste as we work. Work in places the size of Clayhall is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.
- Drawings, the sealant specification and your programme come to us for pricing.
- A fixed quote sets out the scope, the products and the sequence.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- We close out snagging and hand over with a 12-month guarantee.
Preparing the site
- Have the specification and drawings to hand
- Let building users know which areas are affected
- Tell us your opening times and when work is allowed
Ask for a quote
Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to call 01277 525 020 or send photos by email.
Advice
Why act early in Clayhall
Refurbishments sometimes budget for new windows when the frames are sound and only the seal has failed. If the frame is in good order, cutting out and resealing the perimeter can be all it needs. We’ll say so if a frame itself is the problem. Over time, UV, weather and movement wear any sealant out. Replacing it before it fails keeps water out.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
What you get with us
- Constructionline member
- Fully insured
- Colours confirmed for the specified product
- Specification-led, product-correct work
See how commercial sealant jobs are priced or our accreditations and insurance.
General trades versus a specialist
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Common problems we fix in Clayhall
On construction sites, joints usually fail early because of when they were sealed, not what was used. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage.
If one of these sounds familiar, it’s time for a closer look:
- Oversized or tapered gaps around new frames
- Sealant knocked or painted over by other trades
- Failed sealant in an existing building being refurbished
- A mastic package split between trades with no clear owner
Units on estates such as QinetiQ Haslar Marine Technology Park, less than half a mile to the north-east of Clayhall, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Questions to ask before you book
- Whether old or failed sealant will be cut out, not overlaid
- Will CSCS-carded applicators be on site?
- How the joint faces will be prepared and primed
- Their public liability cover
What sealant work can’t fix
Honesty saves time and money. New sealant won’t cure:
- Faulty frames rather than failed sealant
- Approving fire stopping as compliant
- Joints damaged after sign-off by following trades
If you’re not sure, just ring 01277 525 020 or email a schedule or drawings and we will give you a straight answer.
Surfaces we seal
- Window and door perimeters
- Brick and block movement joints
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Cladding and panel joints
- Floor and skirting junctions