Construction Mastic in Welborne
Mastic packages for new-build and refurbishment projects in Welborne and across Hampshire. CHAS accredited and fully insured, with a 12-month guarantee.
- Mastic snags holding up handover
- Missed perimeter joints on a new elevation
- Sanitary sealant damaged by following trades
Construction mastic for Welborne sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our construction mastic in Welborne
The programme rarely stands still, so the mastic package has to flex with it. The sequence is set with the site team and updated as plots or floors are handed over and we don’t seal before other trades have finished in an area. Sealing too early only means coming back once others have damaged it. If you have a mastic package split between trades with no clear owner and perimeter gaps outside the sealant’s range, we can help, on window and door perimeters, internal decorators’ caulk and sanitary and kitchen joints alike. A single leaking joint is often how a building in Welborne first comes to us: we look at the rest while we are there and tell you what we find.
Around smaller places like Welborne, building work usually means conversions of farm buildings, a few new houses or an extension to a hall or school. Perimeters, facade joints and internal sealant all need doing properly, however small the scheme.
Every job is signed off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Location
- Welborne (PO17)
- Region
- Hampshire
- Cover
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Why act early in Welborne
Some packages split mastic across the window fitter, kitchen fitter and plumber. In practice it often means different standards, gaps in responsibility and snags nobody owns. One mastic subcontractor for the lot keeps it simple, with the same standard on every plot. Around Welborne, it’s better to renew all the failing joints at once, rather than one at a time. Send photos of each area and we’ll quote for the lot.
What a job costs comes down to how many linear metres there are, what has to come out first and the access. Call for a quote once you have the details.
Why clients in Welborne choose us
- One phone line for London, the South East and Scotland
- Work carried out by CSCS-carded applicators
- CHAS accredited contractor
- Over 20 years of commercial sealing
See what affects the cost or our accreditations and insurance.
Doing it in-house
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
Welborne: questions and answers
Will you take on work at estates like Knowle Village Business Park, close to Welborne?
Yes. Our area takes in Welborne and its surroundings, with estates and business parks such as Knowle Village Business Park included. A few photographs and the unit address let us price the work.
Can you take on a job at a hospital such as Knowle Hospital?
Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.
Is it fine to apply new sealant on top of old?
No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.
What will the job cost?
Every job gets its own fixed quote. To get one, speak to us on 01277 525 020 or use the quote form with a description of the work.
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 normally get a visit.
Can you follow the specification on our project?
Yes. The specification and the manufacturer’s installation guidance are what we work to.
Do you use the sealant named in the specification?
Specification first, then the maker’s instructions. Primers, backing and joint depth follow what the manufacturer sets out.
Nearby places to Welborne
What else we do in Welborne
Commercial clients in Welborne
If you look after buildings for someone else, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.
Construction mastic around Welborne: points for this area
Welborne lies within about 3 miles of the sea. Facades and window perimeters on coastal schemes take more wind-driven rain, and salt air nearer the shore, so joint design, primers and product choice deserve extra care. Welborne sits in one of the drier corners of the country, the South East. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, so the external programme keeps a little slack.
When a college such as Fareham College, 2.1 miles south of Welborne, builds or refurbishes, the mastic package usually has to fit around students and staff. New units and refits on sites such as Knowle Village Business Park (0.7 miles west of Welborne) need their panel and perimeter joints sealed to the specification. Projects at schools like The Henry Cort Community College work to term dates, so mastic is programmed tightly.
Welborne is about 2 miles north of Fareham, in Hampshire. Anywhere in PO17, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Welborne is one of 723 places in Hampshire on our list. Sites around Portsmouth have their own page, roughly 7 miles from Welborne.
We take on mastic packages across the PO17 postcode area, for business premises of every kind. Just outside Welborne, we also work in Crockerhill (1 mile east), Wickham Common (1 mile north-east), North Fareham (1 mile south-east), Hundred Acres (2 miles north-east) and Fareham (2 miles south). Nearby towns on our patch include Winchester (13 miles north-west), Gosport (6 miles south), Havant (9 miles east), Eastleigh (9 miles north-west), Horndean (8 miles east) and Totton (14 miles west).
Near you in Welborne
Locally, jobs take us to sites close to The Miners Arms. The nearest railway station is Fareham station, about 1.9 miles south of the centre. Nearby you will also find Carron Row Farm Museum (2.4 miles south-west) and Portchester Castle (4.5 miles south-east). Not far away are Portsdown Hill and Swanwick Lakes.
Keeping the joints sound
Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:
- Get the mastic subcontractor involved early in the programme
- Use the product the specification names
- Check frame gaps are within the sealant’s range before sealing
- Allow flexibility for external sealing in damp or cold weather
After we have sealed an area, it helps to keep other trades from damaging the joints. New beads should be left to cure before cleaning or decorating nearby.
In wet areas, a weak sanitary joint shows up quickly once the building is occupied. Leaks behind showers and basins damage finishes and floors. Proper preparation, with the right silicone first time, keeps it off the defects list.
What the job involves on each surface
Internal decorators’ caulk
Caulking is often done in a hurry by whoever’s on site. A neat, consistent caulk line makes the decorators’ job quicker.
Bathrooms, en suites and washrooms
On multi-unit schemes, consistency matters across hundreds of bathrooms. A single team keeps the standard consistent, plot by plot or floor by floor.
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 usually takes a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes, and we clear our waste as we work. Smaller jobs around Welborne can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.
- We price from the drawings, specification and programme you send.
- We return a fixed quote that ties the mastic package to your programme.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Every joint is prepared, set to depth and sealed with the specified product.
- Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.
Getting the site ready
- Point out parking and an unloading spot
- Make sure the joints can be reached
- Have the specification and drawings to hand
Quotes
To get a fixed quote, give us a call on 01277 525 020 or use the quote form, telling us the site location and the nature of the job. You can also send details through our quote form.