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

Mastic sealing for building owners and managing agents in Hardwick, Oxfordshire

Mastic sealing for building owners, managing agents and housing associations throughout Hardwick and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • The same joint failures repeated across a portfolio
  • Brittle perimeter mastic across a building
  • Failed external movement joints
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
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
Constructionline member
Fully insured: £5m PL

Mastic sealing in Hardwick

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

When it isn’t the sealant

Some faults sit outside our scope, and we point that out rather than sealing over them:

  • Substrate edges that need repairing first
  • Broken glass or failed sealed units
  • Failed window or door frames, which need a window contractor

Not sure which it is? You can call 01277 525 020 or send details through our quote form and we will tell you honestly before you book.

Joints and surfaces we work on

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

Mastic sealing in Hardwick

Our clients include managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios. A planned, building-by-building programme often works better than reacting to each complaint, with each block quoted and scheduled in turn. Site teams most often ask us about brittle perimeter mastic across a building and leaks at window and door perimeters, across shopfronts below residential blocks, balcony and threshold joints and communal kitchens and washrooms. Most enquiries from Hardwick start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.

Rural conversions near places like Hardwick often set modern frames into older stone, flint or brick. The mastic needs to suit an irregular masonry face and the look of the building.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Location
Hardwick (OX27)
Wider area
Oxfordshire
Cover
A 12-month guarantee
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Site staff or a sealant specialist?

Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

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.

On site: what to expect

Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in 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. Rural sites near Hardwick may need directions, gate codes or a contact on site. Add it to your enquiry and we will build it into the plan.

  1. We check the asbestos register for older buildings and look at the joints.
  2. A fixed quote covers the joints, products and order of work.
  3. Failed mastic is removed completely.
  4. The joints are prepared and resealed with the right product.
  5. We finish each building before moving to the next.

Preparing the site

  • Point out parking and an unloading spot
  • Clear stock, furniture or equipment away from the joints
  • Send asbestos survey details if the building is pre-2000

Request a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.

Ask for a quote

Advice

Blocks and managed buildings in Hardwick

At about 56 miles from central London, Hardwick is within reach of the capital. Within reach of London, blocks run by agents and associations are common around stations, and window and balcony mastic on them tends to age at the same rate. Rainfall across the South East, Hardwick included, is lower than in many parts of the UK. External mastic still waits for dry faces and the right temperature, and elevations facing the sun and the prevailing weather are typically where frame mastic ages first.

If you’re responsible for a building such as Church of St Mary, frame and door mastic needs the same attention as any other property. For owners of several units at places like Baynards Green Trading Estate, which lies west of Hardwick, one programme can deal with frame and external mastic across the lot.

Hardwick is about 4 miles north of Bicester, in Oxfordshire. If you are looking for mastic sealing in Hardwick, we can help, as we do across Oxfordshire. We work across 423 places in Oxfordshire, from busy centres to rural villages. There’s a separate page for Oxford, about 15 miles away.

Work on mastic joints is covered throughout OX27, whatever the building. Just outside Hardwick, we also work in Hethe (1 mile east), Stoke Lyne (1 mile south-west), Fringford (2 miles east), Bucknell (3 miles south-west) and Stratton Audley (3 miles south-east). Bigger towns within reach include Oxford (15 miles south), Banbury (10 miles north-west), Bicester (4 miles south), Kidlington (11 miles south-west), Headington Quarry (14 miles south) and Bure Park (4 miles south).

What’s near Hardwick

In Hardwick, that means premises near Whitmore Arms Public House and the streets around them. The closest station to Hardwick is Bicester North station, roughly 4.2 miles south. Well-known places in the area include Ardley Castle (2.8 miles south-west) and Bicester Community Hospital (4.6 miles south).

Map of Hardwick © OpenStreetMap contributors

What sets the cost

What shapes the price:

  • The site’s rules and procedures
  • Distance, for remote addresses
  • Whether the work must be split into stages
  • Any access equipment needed

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote.

Sending details for a quote

Diagnosis starts before we arrive. Let us know:

  • The product your specification calls for
  • Clear photos of the problem areas
  • Access details, including height
  • The asbestos register, for older buildings

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or call the office on 01277 525 020 or email a schedule or drawings if you’d rather talk the job through.

Common problems we fix in Hardwick

UV and rain age external sealant. It stiffens, stops stretching and cracks most of all on the sunniest and most exposed elevations.

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

  • Occupiers reporting cold air round windows
  • Open joints in brickwork or panels
  • No planned programme for sealant
  • Estate-wide sealant that is simply worn out

Buildings close to stations like Bicester North station (to the south of Hardwick) are often flats over shops, with frame mastic to keep sound.

Before you book anyone

  • What the guarantee covers, and for how long
  • What site paperwork they can supply
  • How joint depth will be controlled
  • How they’ll work around occupants

Our contractor checklist

Your questions answered

Is Hardwick too far out for you?

Not at all. Hardwick is within our area. We work across Greater London and the South East. We plan jobs in smaller places so return trips are kept to a minimum.

Do you work for managing agents with blocks near Bicester North station?

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

Does weather matter for sealant work?

It can, when the joints are outside. 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.

How long will the new sealant last?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.

Can people stay in the building while you reseal?

The work is planned around occupiers. We agree the programme so you can notify occupiers, and entrances stay in use.

Is mastic sealing guaranteed?

Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Why act early in Hardwick

Leaving failed external joints lets water reach the structure behind. Damp patches, stained plaster and decorating claims can follow, which is harder to deal with than resealing. Around Hardwick, it’s better to renew all the failing joints at once, rather than one at a time. Send photographs of each area and we will quote for the lot.

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

Why choose Mastic Doctor in Hardwick

  • RAL and finish matching where the product range allows
  • Colour options checked against the specified product
  • Products installed to the manufacturer’s instructions
  • Work carried out by CSCS-carded applicators

Take a look at how commercial sealant jobs are priced or our accreditations.

Accreditations

Trusted. Accredited. Insured.