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

Commercial washroom and wet-area sealing in Penton Grafton, Hampshire

Sealing in commercial washrooms, showers, kitchens and wet areas throughout Penton Grafton and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Gaps where vanity tops meet the wall
  • Discoloured joints around urinals and WC pans
  • Split or peeling sealant at shower trays
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
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Washroom sealing across Penton Grafton

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Sanitary sealant for Penton Grafton buildings

At about 65 miles from central London, Penton Grafton is within reach of the capital, within the office belt around the capital. Office toilets in the commuter belt are in use from first arrivals to last departures, so we work a block of facilities at a time.

In a centre such as Enham Arch Retail Park (2.4 miles east of Penton Grafton), public washrooms are resealed a block of facilities at a time. Where you are responsible for a hall attached to a building such as Holy Trinity Church, its kitchen and toilets need sealant that stays cleanable.

Penton Grafton is about 2 miles north-west of Andover, in Hampshire. Businesses, contractors and managing agents in Penton Grafton use us for work on washrooms and wet areas. Across Hampshire, 723 places are covered, Penton Grafton among them. Sites around Southampton have their own page, about 22 miles away.

We take on washrooms and wet areas across the SP11 postcode area. Nearby places we also cover include Penton Mewsey (1 mile north-east), Penton Corner (1 mile south), Foxcotte (1 mile east), Charlton (1 mile east) and Weyhill (1 mile south-west). Bigger towns within reach include Winchester (15 miles south-east), Hyde (14 miles south-east), Tidworth (6 miles west), Weeke (14 miles south-east), Stanmore (15 miles south-east) and Ludgershall (4 miles north-west).

Landmarks near Penton Grafton

We work on buildings around White Hart Public House. The nearest railway station is Andover station, roughly 1.9 miles south-east. A little further out are Andover Museum (2.6 miles south-east) and Ludgershall Castle (4.6 miles north-west). Green spaces nearby include Anton Lakes and Mill Lake.

Map of Penton Grafton © OpenStreetMap contributors

Washroom sealing in Penton Grafton

In a busy washroom, the sealant usually gives up long before the tiles or fittings. Basin tops, urinal backs, panel joints and shower trays put it under water, chemicals and daily cleaning, and once mould grows into it, it can’t be scrubbed out. The fix is to remove it completely and reseal with sanitary silicone containing anti-mould additives. If you have failed sealant behind washroom basins and kitchen worktop joints that can’t be kept clean, we can put it right. Whoever orders the work in Penton Grafton, the brief is usually the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Smaller places such as Penton Grafton still have commercial washrooms and kitchens: in halls, pubs, schools, care homes and farm-based businesses. Mould gets into sealant in any washroom that doesn’t dry out, and once it’s in, the sealant is replaced.

We stand behind the joints we seal with a 12-month guarantee. That covers our preparation and application, and if something we did falls short, we return to it.

Place
Penton Grafton (SP11)
Region
Hampshire
Cover
12 months on every job
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

FAQs: Penton Grafton

Is Penton Grafton too far out for you?

Not at all. Penton Grafton is within our area. London and every South East county are within our area. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Can you work around term dates at a campus such as Andover College?

Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

When is resealing likely to be due?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

Are you CHAS accredited?

Yes. We’re CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards.

How do you choose the sealant?

A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Which silicone is right for commercial washrooms?

Each area gets the grade that suits it. Washrooms and showers take anti-mould sanitary silicone, and food areas take a hygienic, food-safe sealant where food contact is possible.

What affects the price in Penton Grafton

These are the things that shape the price:

  • How much there is to seal
  • The site’s rules and procedures
  • Whether the work must be split into stages
  • Removal of failed or old sealant

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 to include in your enquiry

Good information means a firmer quote. When you get in touch, include:

  • The asbestos register, for older buildings
  • A wide shot and a close-up of the area
  • The postcode of the building
  • How the joints are reached, and at what height

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

Common problems we fix in Penton Grafton

Occasionally a joint keeps failing because of a problem behind it: a loose panel, a leaking waste or water coming through the wall. We check for that first and say if it needs a plumber or another trade.

Most enquiries start with something like this:

  • Discoloured joints around urinals and WC pans
  • Open joints at the base of cubicle panels
  • A new bead over an old one coming away
  • Gaps where vanity tops meet the wall

At a hospital like Andover War Memorial Hospital, which lies east of Penton Grafton, patient and staff washrooms are best done in short phases agreed with the ward.

What to look for in a quote

  • How the joint faces will be prepared and primed
  • What level of public liability insurance do they hold?
  • Can the work be phased to keep areas open?
  • Health and safety accreditation such as CHAS

Questions to ask before you appoint anyone

Honest limits

We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:

  • Leaking pipes, traps, wastes or cisterns, which need a plumber
  • Hollow tiles or loose panels behind the joint
  • A room that stays damp because ventilation isn’t working

If in doubt, call 01277 525 020 or email the details over and we will say what we think.

Surfaces we seal

  • Showers, trays and wet room floors
  • Kitchens and tea points
  • Accessible toilets and changing rooms
  • Urinals and WCs
  • IPS panels and cubicles
  • Vanity units and basins

How a job runs

When we get to site, we sign in, go through any site induction and check how permits are handled. Floors, finishes and fittings next to the joints are covered before any cutting starts, with the work itself usually taking half a day to a day per washroom, depending on the number of fittings. Smaller jobs around Penton Grafton can be grouped with others nearby. A fixed quote is given before anything starts.

  1. We inspect each washroom and record the joints to be resealed.
  2. You get a fixed quote with the phasing plan.
  3. Old sealant is removed completely and the faces cleaned.
  4. Each joint is cleaned and left dry.
  5. New anti-mould sealant goes in and is tooled neat.
  6. Each area is handed back when ready.

Before we start on site

  • Tell us what induction or permit system the site runs
  • Warn occupants and staff about the work
  • Agree which areas must stay open

Getting a fixed quote

Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we’ll arrange a site visit.

Get a price

Advice

Should maintenance staff do it?

Some joints are best left to specialists: 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.

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Keeping the joints sound

Regular inspection catches problems early. In particular:

  • Photograph and log failed joints across the estate
  • Don’t leave an open joint at a basin or tray
  • Report faulty extraction promptly
  • Brief cleaning staff to treat joints gently

Add washroom sealant to routine inspections. Check for mould spots, splits, lifting edges and open joints at trays, basins and urinals and photograph anything new.

Water getting behind IPS panels and vanity units can swell the boards. After that, those parts need replacing rather than resealing.

Accreditations

Trusted. Accredited. Insured.