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

Holybourne mastic sealing

We carry out mastic sealing for building owners, managing agents and housing associations in Holybourne. Send photographs or drawings for a fixed quote.

  • Damaged joints in communal entrances and corridors
  • Open joints in brickwork or panels
  • The same joint failures repeated across a portfolio
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Mastic sealing for Holybourne sites

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

Surface by surface

Commercial and mixed-use buildings

Commercial occupiers usually stay open during the work, so we plan around them.

Communal areas

Communal entrances, stairwells and corridors have joints at door frames, screens, skirting and floor edges. Tidy, sound joints keep them looking cared for.

About our mastic sealing in Holybourne

In buildings from before 2000, some old mastics contain asbestos. We check the asbestos register or survey before any old sealant is cut out and if it’s suspected, work stops until it’s tested. We don’t remove asbestos-containing materials. Site teams most often ask us about the same joint failures repeated across a portfolio and open joints in brickwork or panels, on shopfronts below residential blocks, communal kitchens and washrooms and balcony and threshold joints. Whether you call it commercial sealant work, mastic application or joint sealing, in Holybourne it comes down to the same thing: the right product in a properly prepared joint.

For owners with a single building near Holybourne, we plan to finish in one visit where possible. Photos of each elevation help us quote accurately.

A 12-month guarantee applies to all our work. If an installation problem shows up, call 01277 525 020 or email a schedule or drawings and we’ll arrange a return visit.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Holybourne (GU34)
Region
Hampshire
Cover
12 months on every job
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026

When to call us in Holybourne

We often find joints filled solid with no backing rod, so the mastic is glued to the joint bottom too. That three-sided adhesion stops it stretching and splits as the building moves.

What tends to prompt an enquiry:

  • Damp patches beside frames
  • Estate-wide sealant that is simply worn out
  • No planned programme for sealant
  • Communal area joints that look neglected

For a school such as Andrews' Endowed Church of England Primary School, perimeter mastic on windows and doors is a holiday job.

Comparing quotes

  • How they’ll work around occupants
  • What the guarantee covers, and for how long
  • How the joint faces will be prepared and primed
  • Proof of insurance

Choosing a commercial sealant contractor

Owners, agents and contractors

We work for building owners and managing agents on everything from one building to a spread of sites around Holybourne. One quote can cover more than one site, so there’s one set of paperwork to deal with.

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

Aftercare for building managers

For the best life from the joints:

  • Keep a record of when each building was resealed
  • Protect low-level joints in entrances
  • Share the asbestos register when you send details
  • Encourage occupiers to report problems at frames

Include sealant in planned building inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away, and note the building and elevation.

Water getting in round frames can damage plaster, decoration and the frames themselves. Resealing early keeps the job small.

Why act early in Holybourne

Sealing over failed mastic looks tidy for a while. It won’t grip the old sealant and soon comes away. Full removal and proper preparation is what lasts. One visit to deal with every failing joint makes more sense than several trips to a place like Holybourne, rather than one at a time. Photos of every joint help us quote for the whole job.

The product called for affects the cost, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site requirements come into it too.

Why us?

  • Public liability insurance in place
  • A Constructionline member, so easy to vet
  • Work carried out by CSCS-carded applicators
  • Colour agreed before work starts

Read our cost guide or how we’re accredited.

Holybourne: questions and answers

Is a smaller place like Holybourne outside your area?

Not at all. Holybourne is within our area. We work across Greater London and the South East. Send photos and a list of what needs doing, and we’ll plan the job to need as few trips as possible.

Do you work for managing agents with blocks near Alton station?

Yes. Blocks of any size are within what we do. Send the address, photos of the elevations and your access arrangements, and we’ll give a fixed quote.

Can you send RAMS and CSCS details before starting?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We hold CHAS accreditation and Constructionline membership.

How long does a job like this take?

That varies with the scale of the job, but the work usually takes a day or two for a single block, longer for an estate programme. For bigger or phased jobs, we will set out a timescale with the quote.

Can you seal joints high up on a block?

Access is discussed and agreed before the quote is fixed. Tell us the building height and any access already in place and we’ll confirm the approach in the quote.

Will you just go over the old sealant?

No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.

Is asbestos a concern with old mastic?

In older buildings, old mastic can contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.

Our process

Site rules come first: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Smaller jobs around Holybourne can be grouped with others nearby, which keeps travel down. A fixed quote is given before anything starts.

  1. We inspect the joints, building by building, and record what has failed and why.
  2. You get a fixed quote, priced per building where that helps your budgeting.
  3. The programme is fixed with you, including dates you can pass on to residents or tenants.
  4. We remove the old mastic completely and clean the joint faces back.
  5. Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
  6. Each building is checked on completion and the work carries our 12-month guarantee.

Before we start on site

  • Arrange parking or a loading space
  • Move anything stored against the joints
  • Let us know about inductions and permits

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Get a quick quote

Related advice

Mastic sealing in Holybourne: the local picture

Holybourne is in the South East, one of the UK’s drier regions. Outside mastic still needs a dry joint and the right temperature, while the elevations that take the most sun tend to show hardened mastic first. Central London is about 44 miles from Holybourne. Around the capital’s commuter belt, managing agents look after many blocks close to stations and town centres.

If you are responsible for a building such as Holy Rood Church, frame and door mastic needs the same attention as any other property. Historic properties like Bentworth Hall, 4.6 miles west of Holybourne, show the age of some local stock, where frame mastic must suit soft brick or stone.

Holybourne is about 2 miles north-east of Alton, in Hampshire. Anywhere in GU34, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. 723 places across Hampshire fall within our area, Holybourne among them. For work in that direction, see our Reading page.

Anyone looking for mastic sealing in GU34 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. For a building on London Road, Carpenters Close and Inhams Road or nearby, send details and we’ll quote for mastic joints. We also cover Neatham (1 mile south-east), Alton (2 miles south-west), Upper Froyle (2 miles north-east), Wyck (2 miles south-east) and East Worldham (2 miles south) for mastic joints. Bigger towns within reach include Basingstoke (10 miles north-west), Farnborough (12 miles north-east), Fleet (9 miles north-east), Aldershot (10 miles north-east), Petersfield (11 miles south) and Yateley (13 miles north).

What’s near Holybourne

Recent enquiries here include premises near White Hart pub, Eggar's School and Treloar School and the streets around them. The nearest railway station is Alton station, roughly 1.2 miles south-west of the centre. Nearby you’ll also find Alton Community Hospital (2.4 miles south-west) and Allen Gallery (1.5 miles south-west). Green spaces nearby include Holybourne Hill.

Map of Holybourne © OpenStreetMap contributors
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