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

Mastic sealing for building owners and managing agents in North Street, Hampshire

Mastic sealing for building owners, managing agents and housing associations in North Street. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • No planned programme for sealant
  • Open joints in brickwork or panels
  • Leaks at window and door perimeters
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
£5m public liability

Mastic sealing for businesses in North Street

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Mastic sealing in North Street

Different joints need different sealants. Window perimeters and external joints often take a low-modulus neutral-cure silicone, and MS polymer sealants stick well to many substrates and often take paint. We will confirm the colours available for the specified product. We work on balcony and threshold joints, shopfronts below residential blocks and window and door perimeters on blocks, and the failures we’re asked to look at most are worn sealant at communal door frames and draughts at frames across a block. Facilities teams, main contractors and managing agents in North Street tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

In and around smaller places like North Street, landlords and agents often look after small groups of housing association properties, converted farm buildings and community buildings. Frame and wall-joint mastic on all of them ages and hardens.

Our workmanship is guaranteed for 12 months, in North Street as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Location
North Street (SO24)
Wider area
Hampshire
Guarantee
12 months on our workmanship
Quotes
A fixed quote before we start
Phone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

What we can’t put right

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Broken glass or failed sealed units
  • Water coming in from the roof or rainwater goods
  • Failed window or door frames, which need a window contractor

Not sure which it is? You can call 01277 525 020 or email the details over and we’ll tell you honestly.

Joints and surfaces we work on

  • Communal kitchens and washrooms
  • Shopfronts below residential blocks
  • Window and door perimeters on blocks
  • Communal entrances and stairwells
  • Balcony and threshold joints
  • External wall and movement joints

What affects the price in North Street

The price varies from site to site. It mainly depends on:

  • Removal of failed or old sealant
  • Backing rod, priming and other preparation
  • Site requirements such as inductions and permits
  • The product specified

The specified product makes a difference, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site rules also count.

Details that help us quote

Whether it’s one area or a whole building, the same details help:

  • When you need the work done
  • The postcode of the building
  • What the building is and how it’s used
  • The product your specification calls for

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, call 01277 525 020 or email the details over.

From enquiry to sign-off

Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. Smaller jobs around North Street can be grouped with others nearby. A fixed quote is given before anything starts.

  1. Each block or building is walked and the failed joints recorded with the likely cause.
  2. We send a fixed quote that sets out the joints, the products and the programme.
  3. The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
  4. Failed mastic is removed and the faces taken back to sound, dry material.
  5. Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
  6. Finished joints are looked over and the 12-month guarantee confirmed.

Before we start on site

  • Share the asbestos register for older buildings
  • Explain the parking and delivery arrangements
  • Agree which areas must stay open

Getting a fixed quote

Send us photos, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.

Get a price

Related advice

What the job involves on each surface

Estate-wide resealing programmes

Housing associations and agents often manage many similar blocks. We quote building by building and work through them in turn.

Communal areas

Communal areas stay in use while we work. Work is planned in sections.

Blocks and managed buildings in North Street

North Street sits in one of the drier corners of the country, the South East. Outside work still depends on dry joints, while the elevations that take the most sun tend to show hardened mastic first. Central London is about 51 miles from North Street. Within reach of London, blocks run by agents and associations are common around stations; their frame mastic often ages block-wide.

Schools and community buildings such as Ropley Church of England Primary School need frame and external mastic kept sound like any building. If you’re responsible for a building such as Church of St Peter, frame and door mastic needs the same attention as any other property. Landlords with units on estates such as Lower Soldridge Business Park, 1.4 miles north-east of North Street, can bring frame, door and external mastic across several units into one programme.

North Street is about 6 miles south-west of Alton, in Hampshire. Anywhere in SO24, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 723 places in Hampshire, large and small. Southampton is covered too, some 18 miles away.

Commercial sites across SO24 are covered for mastic joints. Close to North Street, our area also takes in Gilbert Street (1 mile south-east), Ropley (1 mile south), Ropley Dean (1 mile south-west), Kitwood (1 mile east) and Charlwood (2 miles south-east). Bigger towns within reach include Basingstoke (12 miles north), Winchester (10 miles west), Eastleigh (14 miles south-west), Horndean (13 miles south), Chandler's Ford (15 miles south-west) and Alton (6 miles north-east).

Landmarks near North Street

Nearby you’ll also find Barton Castle (3.3 miles north-west) and Alton Community Hospital (5.1 miles north-east). Open spaces near North Street include Shutts Copse and Red Hill.

Map of North Street © OpenStreetMap contributors

North Street: questions and answers

Can one quote cover a number of our buildings near North Street?

Yes. Portfolio-wide programmes are a regular request. We can phase the programme to suit your budgets and notice periods.

Is Lower Soldridge Business Park, near North Street, within your area?

Yes. Our area takes in North Street and its surroundings, with estates and business parks such as Lower Soldridge Business Park included. Send details of the unit and the work through our quote form for a quick quote.

Will you just go over the old sealant?

No. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.

How many days will you need on site?

The duration is planned around your programme and the access we are given. We will give you an estimate of time on site when we quote.

Do you work with property factors and landlords?

Yes, that’s exactly who this service is for. Buildings are scheduled in turn with dates agreed in advance.

Who decides which product is used?

A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

How do you handle work on occupied blocks?

Occupiers stay in the building throughout. If any flats or units need access, we’ll tell you in advance so you can arrange it with occupiers.

What happens if it’s left?

Leaving failed external joints lets water reach the structure behind. That can lead to damp, staining and damage to finishes and those cost far more to put right. One visit to deal with every failing joint makes more sense than several trips to a place like North Street. Send photos of each area and we’ll quote for the lot.

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

Why clients in North Street choose us

  • Clear, fixed quotes
  • Public liability insurance in place
  • Specification-led, product-correct work
  • Commercial sealant work since 2005

See how commercial sealant jobs are priced and our accreditations and insurance.

General trades versus a specialist

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Accreditations

Trusted. Accredited. Insured.