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

Construction Mastic in Lee-on-the-Solent

Mastic packages for new-build and refurbishment projects in Lee-on-the-Solent. CHAS accredited and fully insured, with a 12-month guarantee.

  • Old sealant on a refurbishment that needs stripping before new work
  • Sealant knocked or painted over by other trades
  • New external sealant already peeling away
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
£5m public liability

Construction mastic in Lee-on-the-Solent

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

How the job changes by surface

Kitchens and utility areas

Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. The sealant is a kitchen-grade product, food-safe where food contact is possible.

External facade and movement joints

Brickwork, blockwork and panel movement joints need a sealant with the right movement capability. Depth is controlled with backing rod so the bead bonds to two sides only.

Construction mastic for commercial buildings in Lee-on-the-Solent

The programme rarely stands still, so the mastic package has to flex with it. We agree a sequence at the start and adjust it as the site manager releases areas. Sealing too early only means coming back once others have damaged it. If you’re dealing with existing joints on a refurb that need cutting out and resealing and cracks opening in caulked internal joints, we can put it right, whatever the surface. A specialist sealant contractor works differently from a general builder: in Lee-on-the-Solent, that means joint design, primers and backing rod as standard.

Building work in places the size of Lee-on-the-Solent is usually small-scale: a handful of new houses, barn conversions, a school or hall extension. Small schemes still need window perimeters, facade joints and internal sealant done to the specification.

We stand behind the joints we seal: 12 months, guaranteed. That covers our preparation and application.

Mastic Doctor team members lined up next to their branded vans outside an office building
Location
Lee-on-the-Solent (PO13)
Wider area
Hampshire
Guarantee
12 months on every job
Quote
Fixed quote, scope in writing
Call
01277 525 020
Updated
3 November 2026

Sites and facades in and around Lee-on-the-Solent

The sea is no more than about 1 mile from Lee-on-the-Solent. On a coastal site, facade and perimeter joints face driven rain and, closer to the beach, salt, which puts weight on correct joint sizing, priming and a sealant suited to the exposure. Central London is about 68 miles from Lee-on-the-Solent. Construction around the commuter belt mixes station-side flats with refurbished offices and units, and main contractors there need mastic that keeps to the programme.

For contractors refurbishing units at places like Brockhurst Gate Retail Park (1.9 miles north-east of Lee-on-the-Solent), the mastic covers cladding panels, roller-door and window perimeters. Hospital estates such as Gosport War Memorial Hospital (to the east of Lee-on-the-Solent) tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan. For contractors at a school such as Lee-On-the-Solent Infant and Nursery School, sealing has to be finished before term starts.

Lee-on-the-Solent is about 2 miles west of Gosport, in Hampshire. If you’re looking for construction mastic in Lee-on-the-Solent, we can help, as we do across Hampshire. Our Hampshire coverage takes in 723 places, from busy centres to rural villages.

Anyone looking for construction mastic in PO13 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. For a building on High Street, Victoria Square and Wheatcroft Road or nearby, send details and we’ll quote for mastic packages. Nearby places we also cover include Crofton (1 mile north), Peel Common (1 mile north), Rowner (2 miles north-east), Bridgemary (2 miles north-east) and Gosport (2 miles east) for mastic packages. Bigger towns within reach include Havant (10 miles north-east), Eastleigh (13 miles north-west), Fareham (3 miles north), Horndean (11 miles north-east), Chandler's Ford (15 miles north-west) and Hedge End (9 miles north-west).

Landmarks near Lee-on-the-Solent

Around Lee-on-the-Solent, our work takes us to commercial buildings near Crofton School and Baycroft School. Lee-on-the-Solent’s nearest station is Fareham station, roughly 3.5 miles north. Well-known places in the area include Fareham Shopping Centre (3.6 miles north) and Gosport War Memorial Hospital (2.1 miles east). Open spaces near Lee-on-the-Solent include West of the River Alver.

Map of Lee-on-the-Solent © OpenStreetMap contributors

Building owners, agents and FMs in Lee-on-the-Solent

Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, with each stage agreed with your site contact.

FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.

When to bring in a specialist

Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.

Your questions answered

Our building in Lee-on-the-Solent is near the coast: does that change the sealant?

It can, yes: buildings near the sea take more wind-driven rain, and salt in the air nearer the shore. We choose the product for the exposure, prime where the manufacturer requires it and size the joint for its movement.

Will you plan work around the academic year at somewhere like University of Portsmouth - North Zone?

Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.

When can the area be used after sealing?

We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.

Will you just go over the old sealant?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

Is the mastic package guaranteed?

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

How long do sealant joints last?

Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular checks let you plan resealing before leaks or damage.

How do we ask for a quote?

The quote form is the simplest route, though you can also call 01277 525 020 or use the quote form. Photos, drawings or a joint schedule help us quote quickly.

When something else is needed

Our job is the joint, not everything around it. Sealant alone won’t deal with:

  • Deciding which fire-stopping product a penetration needs
  • Designing joint widths or choosing the specification (that sits with the designer)
  • Joints damaged after sign-off by following trades

Not sure which it is? You can give us a call on 01277 525 020 or email a schedule or drawings and we will tell you honestly before you book.

Surfaces we seal

  • Window and door perimeters
  • Brick and block movement joints
  • Cladding and panel joints
  • Internal decorators’ caulk
  • Sanitary and kitchen joints
  • Floor and skirting junctions

Our process

Inspect, seal, sign off: that’s the shape of every visit. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. For a site in Lee-on-the-Solent, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.

  1. Drawings, the sealant specification and your programme come to us for pricing.
  2. A fixed quote sets out the scope, the products and the sequence.
  3. You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
  4. We seal each plot or floor as it’s released to us.
  5. Each joint is prepared, backed to depth and sealed in the product the specification names.
  6. We close out snagging and hand over with a 12-month guarantee.

What we need from you

  • Agree which areas must stay open
  • Tell us what induction or permit system the site runs
  • Move anything stored against the joints

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, phone 01277 525 020 or use the quote form.

Get a quick quote

Read more

Aftercare for building managers

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Don’t force external sealing on a damp or frosty day
  • Note which sealant went where at handover
  • Bring the mastic contractor in after the last trades are through
  • Protect sealed areas from following trades

At handover, keep the product details with the O&M information. Future maintenance is easier when the products are known, and tells you what to reseal with. We can confirm the handover information you need when we quote.

Sanitary joints that fail early become defects soon after occupation. Water gets behind trays, vanity tops and panels, and the repair falls into the defects period. Proper preparation, with the right silicone first time, keeps it off the defects list.

Accreditations

Trusted. Accredited. Insured.