The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Horseport construction mastic

We carry out mastic packages for new-build and refurbishment projects in Horseport and the surrounding area. Send details for a fixed quote.

  • Snag items on joints that need redoing before handover
  • Caulk cracking where joints are moving more than expected
  • Window and door perimeters that won’t pass inspection
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Construction mastic for Horseport sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

About our construction mastic in Horseport

A typical mastic package covers more than window perimeters: external door and window perimeters, internal decorators’ caulk where specified, sanitary joints in bathrooms and washrooms, kitchen worktops and splashbacks, and snagging before handover. Splitting those between trades often leaves gaps in responsibility and gives you a consistent finish across the job. Most enquiries involve oversized or tapered gaps around new frames and frame perimeters left unsealed or poorly sealed, on cladding and panel joints, floor and skirting junctions and internal decorators’ caulk. For commercial sealant work in Horseport, you deal with one contact from quote to sign-off, whether it’s one building or several.

For a site near Horseport, the mastic visit is planned so the right sealants, primers and backing rod are on hand. Send drawings or photos and the programme and we will quote to suit.

Building owners and contractors get the same cover: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Horseport (SP6)
Wider area
Hampshire
Guarantee
A 12-month guarantee
Quote
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

Looking after the joints

To get the most from the new sealant:

  • Get the mastic subcontractor involved early in the programme
  • Ask installers to correct oversized gaps first
  • Ask cleaners to use soft cloths around fresh sealant
  • Use the product the specification names

If a joint is damaged after sealing, flag it early. Snags can be picked up in a planned close-out visit as agreed in the quote.

One unsealed frame can let water into finished internal areas. On a new building that means remedial work after decorating. Checking perimeters before internal finishes go on avoids it.

Building owners, agents and FMs in Horseport

Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.

CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.

New build and refits around Horseport

Rainfall across the South East, Horseport included, is lower than in many parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, which is why external dates are agreed with the site manager.

Older buildings in the area around Horseport, such as Breamore House, which lies north of Horseport, need care when sealed: the product has to suit soft or historic materials. Extensions at sites like Fordingbridge Hospital, less than half a mile to the west of Horseport, typically sit beside working departments, and the mastic follows strict access rules. New units and refits on sites such as Arch Farm Industrial Estate, 0.8 miles north-west of Horseport, need their panel and perimeter joints sealed to the specification.

Horseport is in Hampshire. Any commercial site in Horseport is covered. Across Hampshire, 723 places are covered, including Horseport. There’s a separate page for Southampton, about 17 miles away.

Work on mastic packages is covered throughout SP6, for business premises of every kind. If your site is on Bridge Street, Southampton Road and Ringwood Road or close by, we can quote for mastic packages. Just outside Horseport, we also work in Fordingbridge (1 mile north-west), Criddlestyle (1 mile east), Stuckton (1 mile south-east), Lower Burgate (1 mile north) and Tinkers Cross (1 mile north-west). Nearby towns on our patch include Totton (12 miles east), Romsey (14 miles east), New Milton (13 miles south-east), Ringwood (6 miles south), Barton on Sea (14 miles south-east) and Marchwood (15 miles east).

Near you in Horseport

We work on buildings around The Burgate School and Sixth Form and The George Inn, among other places. Other landmarks nearby include Fordingbridge Doll Museum (under half a mile west) and Godshill Castle Hill (1.6 miles north-east). Not far away are Blashford Lakes and Linbrook Lake.

Map of Horseport © OpenStreetMap contributors

What sets the cost

Each job is priced on its own details. The things that drive the figure:

  • Which sealant the job calls for
  • Site requirements such as inductions and permits
  • How much there is to seal
  • Distance, for remote addresses

Pricing mastic packages depends on quantities, condition and access, plus any specification you are working to. Call for a quote.

What to include in your enquiry

For an accurate fixed quote, we need to understand the site. Useful things to include:

  • Approximate linear metres or a joint schedule
  • The product your specification calls for
  • The asbestos register, for older buildings
  • The type of building and who uses it

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.

What the job involves on each surface

Kitchens and utility areas

Kitchen joints are sealed after fitting and before final clean. A kitchen-suitable sealant is used.

Window and door perimeters

Perimeter joints between frames and the structure are the weather line on any new building. They’re sealed with a low-modulus neutral-cure silicone or another product named in the specification.

Diagnose, treat, sign off

Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. Smaller jobs around Horseport can be grouped with others nearby, which keeps travel down. A fixed quote is given before anything starts.

  1. Drawings, specification and programme come to us.
  2. Quantities are measured and a fixed price returned.
  3. The sequence is agreed with the site manager.
  4. Plots or floors are sealed as they’re handed over.
  5. Joints are prepared, backed and sealed to the specification.
  6. Snags are cleared and the package signed off with our 12-month guarantee.

What we need from you

  • Tell us which areas need to stay in use
  • Let us know about inductions and permits
  • Send asbestos survey details if the building is pre-2000

Ask for a quote

For a fixed quote, speak to us on 01277 525 020 or send details through our quote form with the site address and an outline of the work. Our quote form is another easy route.

Get a quick quote

Read more

FAQs: Horseport

Does your area include sites such as Arch Farm Industrial Estate, near Horseport?

Yes. Our area takes in Horseport and its surroundings, with estates and business parks such as Arch Farm Industrial Estate included. A few photographs and the unit address let us price the work.

Is Horseport too far out for you?

Not at all. Horseport is within our area. We work across Greater London and the South East. Good photographs up front let us bring everything on the first visit.

Can the building stay open while you work?

Yes, with some planning. Tell us your site hours and access windows and we will plan around them.

When can the area be used after sealing?

That comes down to the sealant and the temperature. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.

Do you guarantee new-build sealant work?

Each package is signed off with a 12-month workmanship guarantee. The guarantee covers our work, not later damage by other trades.

What if there’s asbestos in the old mastic?

Asbestos is possible in some older mastics, particularly in buildings from before 2000. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.

Is any job too small?

Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.

Why it’s worth doing now in Horseport

On a refurbishment, there’s a choice between resealing existing frames and replacing them. Sound frames often need only a new perimeter seal and that’s a far smaller job. We will say so if a frame itself is the problem. For buildings around smaller places like Horseport, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Resealing early avoids that.

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

Why clients in Horseport choose us

  • Old sealant cut out, never sealed over
  • Colour options checked against the specified product
  • RAL and finish matching where the product range allows
  • Specification-led, product-correct work

See what affects the cost or how we’re accredited.

Accreditations

Trusted. Accredited. Insured.