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

Mastic contractors in Long Crendon

Our CSCS-carded applicators take on mastic packages for new-build and refurbishment projects in Long Crendon and the surrounding area. Send details for a fixed quote.

  • Existing joints on a refurb that need cutting out and resealing
  • A mastic package split between trades with no clear owner
  • Oversized or tapered gaps around new frames
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
£5m public liability

Construction mastic in Long Crendon

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

Construction mastic for commercial buildings in Long Crendon

Since 2005 we have worked alongside main contractors, developers and fit-out firms. Quantities come off the drawings, the sequence is agreed with the site manager and the work follows the trades. To price a package in Long Crendon, send drawings and the specification through our quote form. If you are dealing with window and door perimeters that won’t pass inspection and oversized or tapered gaps around new frames, we can help, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, in Long Crendon it comes down to the same thing: the right product in a properly prepared joint.

For a contractor on a smaller site near Long Crendon, one mastic visit at the right stage saves return trips. Tell us when scaffold comes down and when decoration finishes, and we will plan around those stages.

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant.

Place
Long Crendon (HP18)
Wider area
Buckinghamshire
Guarantee
12 months on our workmanship
Quotes
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Our process

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. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Work in places the size of Long Crendon is planned as a single visit where we can. Clear photos and measurements help us bring the right products.

  1. We start with the drawings, specification and programme.
  2. Quantities are measured and a fixed price returned.
  3. The sequence is agreed with the site manager.
  4. Plots or floors are sealed as they’re handed over.
  5. Joints are prepared, backed and sealed to the specification.
  6. After snagging, the work is handed over under our 12-month guarantee.

Getting the site ready

  • Let building users know which areas are affected
  • Arrange parking or a loading space
  • Tell us your opening times and when work is allowed

Request a quote

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or email drawings and photos.

Ask for a quote

Read more

Quoting for work in Long Crendon

Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:

  • Travel to remote or island sites
  • How much there is to seal
  • How much existing material needs removing
  • Which sealant the job calls for

There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • The postcode of the building
  • Asbestos survey details if the building is older
  • Rough lengths or quantities, or drawings if you have them
  • When you need the work done

Let us know the site, the scope and your timescale, and we will put a fixed quote together. To get it moving, give us a call on 01277 525 020 or send photos by email.

Your questions answered

Does your area include sites such as Crendon Industrial Estate, near Long Crendon?

Yes. We cover Long Crendon and the area around it, including industrial estates, business parks and retail parks such as Crendon Industrial Estate. To start, just ring 01277 525 020 or email the details over with the unit, the joints involved and your access times.

Do you take on work at healthcare sites like Thame Community Hospital?

Yes. We work in healthcare settings as well as offices and schools. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

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.

Do you do internal caulk as well as external mastic?

The scope comes from the specification and drawings, but most packages include frame perimeters, sanitary and kitchen joints, caulking where specified and a snagging pass.

Can you follow the specification on our project?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

How do we ask for a quote?

The quote form is the simplest route, though you can also phone 01277 525 020 or use the quote form. Photos, drawings or a joint schedule help us quote quickly.

Will you come and look before quoting?

Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we will arrange a visit before quoting.

When something else is needed

Not every problem is a sealant problem, and we’re upfront when that’s the case. These need a different solution:

  • Frames fitted out of tolerance
  • Approving fire stopping as compliant
  • Glazing units that are cracked or misted

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

Surfaces we seal

  • Cladding and panel joints
  • Brick and block movement joints
  • Window and door perimeters
  • Internal decorators’ caulk
  • Sanitary and kitchen joints
  • Floor and skirting junctions

Keeping the joints sound

Problems stay small when the joints are checked regularly. In particular:

  • Check frame gaps are within the sealant’s range before sealing
  • Keep scrapers and abrasive pads off new beads
  • Ask for joint and product checks before the package is urgent
  • Allow flexibility for external sealing in damp or cold weather

Brief the sparkle clean so they don’t scrape the new joints. Blades and abrasive pads are the commonest cause of damage at the final clean so keep them off the joints.

A missed perimeter seal on one window can wet the reveal and the plaster inside. That normally means redoing finishes in a completed area. A check of every frame before decorators start is worth the time.

Construction mastic around Long Crendon: points for this area

A 2-mile radius around Long Crendon takes in a number of hotels. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. The South East is one of the drier parts of the UK. Still, external mastic needs dry faces within the maker’s temperature limits, which isn’t every day, which is why external dates are agreed with the site manager.

New wings at hospitals like Thame Community Hospital (to the south-east of Long Crendon) bring long runs of window and panel joints to seal. When units on a site such as Crendon Industrial Estate (to the south-east of Long Crendon) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.

Long Crendon is about 2 miles north-west of Thame, in Buckinghamshire. Our applicators travel to Long Crendon for work on mastic packages. Long Crendon is one of 308 places we cover in Buckinghamshire. For work in that direction, see our Oxford page, about 10 miles away.

Postcode districts covered here: HP18 for mastic packages. For a building on High Street, The Square and Giffard Way or nearby, send details and we will quote for mastic packages. Just outside Long Crendon, we also work in Chearsley (2 miles north-east), Thame (2 miles south-east), Moreton (3 miles south), Haddenham (3 miles east) and Cuddington (3 miles north-east). Further afield, our area takes in Aylesbury (8 miles east), High Wycombe (15 miles south-east), Buckingham (15 miles north), Elmhurst (9 miles north-east), Southcourt (8 miles east) and Princes Risborough (8 miles south-east).

Around Long Crendon

Locally, jobs take us to sites close to Lord Williams's School and The Eight Bells Public House and the streets around them. The closest station to Long Crendon is Haddenham & Thame Parkway station, roughly 2.3 miles east. A little further out are Dinton Castle (4.7 miles east) and Thame Community Hospital (2.4 miles south-east). The countryside around Long Crendon includes Snakemoor.

Map of Long Crendon © OpenStreetMap contributors

When to call us in Long Crendon

Most mastic snags on new buildings come from sequencing rather than product. Sealing before decorators, flooring or other trades have finished leaves joints exposed to damage.

If one of these sounds familiar, it’s time for a closer look:

  • A mastic package split between trades with no clear owner
  • Window and door perimeters that won’t pass inspection
  • Old sealant on a refurbishment that needs stripping before new work
  • Caulk cracking where joints are moving more than expected

School extensions, at buildings such as Long Crendon School, usually run to the summer holidays, mastic included.

Before you book anyone

  • Whether their applicators hold CSCS cards
  • What the guarantee covers, and for how long
  • Do they follow the manufacturer’s priming guidance?
  • Which product they’ll use, and why it suits the joint

How to choose a sealant contractor

How the job changes by surface

External facade and movement joints

External movement joints often need primer, depending on the substrate. Primer goes on where the sealant maker calls for it.

Fire-rated sealant where specified

Fire-rated sealant is one type of fire-stopping product. Other products are used for some services and gaps. Record requirements are agreed with the quote.

Accreditations

Trusted. Accredited. Insured.