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

Commercial sealant contractors in Newnham, Hampshire

Our CSCS-carded applicators take on sealant work for offices, shops, hotels and other commercial buildings in Newnham and the surrounding area. Send details for a fixed quote.

  • Window and door perimeter joints that have cracked open
  • Movement joints packed with grit and debris
  • Earlier reseals applied straight onto the failed bead
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m public liability

Commercial sealant contractors for businesses in Newnham

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

Leave it or put it right?

Leaving a failed joint rarely saves money. Once water gets behind the seal, finishes and ceilings underneath are next. Dealing with it while the damage stops at the bead is the cheaper route. Converted and older buildings near places like Newnham tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.

The price depends on how many linear metres there are, how much old material needs removing and the access. Call for a quote when you’re ready.

Why us?

  • Products installed to the manufacturer’s instructions
  • 12 months’ guarantee on every job
  • Failed material removed, not covered up
  • Over 20 years of commercial sealing

Read what affects the cost and our accreditations.

Commercial sealant contractors for commercial buildings in Newnham

A reseal stands or falls on the preparation underneath it. Old silicone gives new sealant nothing to grip, so every trace of it is removed and the faces are cleaned until they’re sound and dry, with no dust or grease left. Primer is used wherever the manufacturer calls for it on that surface, and a backing rod limits the depth to give the sealant room to work. Most enquiries involve frame mastic that has hardened and come away from the wall and gaps behind commercial kitchen worktops and sinks, across washrooms and tea points, kitchen worktops and splashbacks and movement joints in walls and floors. Facilities teams, main contractors and managing agents in Newnham tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Occupied buildings in Newnham need the work phased: we agree the order with you and hand back each area with its cure time.

Rural business units near smaller places such as Newnham are frequently converted agricultural buildings. Their mix of old walls with new frames, partitions and floors means many joints between unlike materials, and a sealant colour that suits the building’s character is often part of the brief.

Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. 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
Where
Newnham (RG27)
Region
Hampshire
Cover
12 months on our workmanship
Quotes
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026

Building owners, agents and FMs in Newnham

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.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Newnham can form part of a wider programme across Hampshire.

FAQs: Newnham

Is Newnham too small for you to travel to?

No. Places such as Newnham are covered as much as the big towns. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

Will you take on work at estates like Optrex Business Centre, close to Newnham?

Yes, sites like Optrex Business Centre are within our area, along with the rest of Newnham. To start, just give us a call on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.

When can the area be used after sealing?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, so we will confirm the curing time on the day.

How many days will you need on site?

We plan the time on site around your programme and access. You will have an expected duration with the quote.

How do you choose the sealant?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Does the weather affect the work?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.

What about asbestos in old mastic?

In buildings from before 2000 in particular, some old mastics and sealants may contain asbestos. Before cutting anything out, we ask for the asbestos register or survey, and anything suspect is left until it has been tested.

What Newnham’s businesses ask us to seal

There are several hotels within about 2 miles of Newnham. A hotel refurbishment is full of joints that guests will see, and a matched colour keeps them discreet. Newnham lies roughly 41 miles out from central London. The commuter belt holds a great many offices, retail parks and business parks. If you have premises across the region, one contractor can cover them all.

Offices and shops close to stations such as Hook station (1.2 miles east of Newnham) tend to be busy all day, so sealant work is planned around opening hours. On a business park such as Optrex Business Centre, 1 mile north of Newnham, sealant work tends to follow fit-outs: receptions, tea points, washrooms and frame perimeters.

Newnham is about 5 miles east of Basingstoke, in Hampshire. We cover Newnham and the rest of Hampshire, with the same fixed quotes and 12-month guarantee as everywhere else. Newnham is one of 723 places we cover in Hampshire. Sites around Reading have their own page, about 12 miles away.

If you need commercial sealant contractors in RG27, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. For a building on Tylney Lane, Newnham Lane and Ridge Lane or nearby, we can quote for sealant joints. Close to Newnham, our area also takes in Nately Scures (1 mile south), Hook Common (1 mile south-east), Up Nately (1 mile south), Hook (1 mile east) and Warnborough Green (2 miles south-east). Further afield, our area takes in Basingstoke (5 miles west), Farnborough (10 miles east), Fleet (7 miles east), Aldershot (10 miles east), Alton (9 miles south) and Yateley (8 miles north-east).

Local landmarks in Newnham

For rail, the closest station is Hook station, about 1.2 miles east. A little further out are Odiham Castle (1.9 miles south-east) and Basing House (2.8 miles west). The countryside around Newnham includes Dogmersfield Lake and Tundry Hill.

Map of Newnham © OpenStreetMap contributors

Doing it in-house

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

What you see is the finished bead, but most of the work is hidden. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

When to call us in Newnham

The wrong sealant in the wrong place is a common cause of early failure. Painters’ acrylic in a moving joint, vinegar-smelling silicone on metal or natural stone, or a high-modulus product where a low-modulus one was needed will all fail early. BS 6213 gives guidance on choosing construction sealants, and many specifications refer to it.

Site and facilities staff are often the first to spot these:

  • Water staining near frames, panels or ceilings
  • Movement joints packed with grit and debris
  • Messy, uneven beads from earlier work that let the building down
  • Mouldy silicone around WCs, urinals and vanity tops

In hotels such as Basingstoke Country Hotel (0.6 miles south-east of Newnham), refurbishments typically mean bathroom, bar and reception joints where a matched sealant colour has to sit with the finishes.

Before you book anyone

  • Will RAMS and insurance details be available?
  • How joint depth will be controlled
  • Who will actually carry out the work
  • Whether old or failed sealant will be cut out, not overlaid

Choosing a commercial sealant contractor

From enquiry to sign-off

We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. Smaller jobs around Newnham can be grouped with others nearby. You will have a fixed quote before work starts.

  1. First, details reach us through the quote form or a site visit.
  2. The cause is diagnosed and the scope priced as a fixed quote.
  3. Where parts of the building must stay open, the work is phased.
  4. Every failed bead is removed rather than covered.
  5. Each joint gets a suitable sealant, laid to depth and tooled.
  6. A final walk-round, then the 12-month guarantee applies.

Before we start on site

  • Clear stock, furniture or equipment away from the joints
  • Let building users know which areas are affected
  • Tell us what induction or permit system the site runs

Request a quote

Need a figure for a tender or a budget? We will quote against your scope and drawings you can plan around. If you have questions first, call the office on 01277 525 020 or email the details over.

Ask for a quote

Read more

Keeping the joints sound

Regular inspection catches problems early. Specifically:

  • Keep barriers up until the new sealant has cured
  • Make sure ventilation in wet areas is switched on and working
  • Check the asbestos register before anyone disturbs old sealant in an older building
  • Brief cleaning contractors to avoid scourers and blades on sealant

Brief your cleaning team on the joints that have been resealed. Scourers, blades and harsh products shorten a bead’s life; a mild cleaner is all most joints need.

Each spell of wet weather pushes more water through an open joint. Behind a panel or frame, that water can sit unseen for a long time. Catching it at the sealant stage avoids the bigger repair.

Accreditations

Trusted. Accredited. Insured.