The Mastic Doctor team standing beside their branded vans outside an office building
Na h-Eileanan Siar · Scotland

Cross construction mastic

We carry out mastic packages for new-build and refurbishment projects in Cross and the surrounding area. Send photographs or drawings for a fixed quote.

  • Bath and shower joints scraped during the final clean
  • Early adhesion failures on new external joints
  • Oversized or tapered gaps around new frames
1
Send details
Tell us about the site, with photos if you have them.
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
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Construction mastic across Cross

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

Sealant solves a lot, but not everything, and we are upfront when that’s the case. These need a different solution:

  • Specifying the product where the designer hasn’t
  • Rework caused by others damaging completed areas
  • Frame gaps too wide for sealant, which the installer needs to correct

Not sure which it is? You can call the office on 01277 525 020 or email the details over and we will tell you honestly before you book.

Where we work in Cross

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

Construction mastic in Cross

A typical mastic package covers more than window perimeters: frame perimeters inside and out, caulking to trims and boards where the specification calls for it, sanitary silicone, kitchens, and the final snag list. Splitting those between trades often leaves gaps in responsibility, and one applicator team gives a consistent finish. We work on sanitary and kitchen joints, internal decorators’ caulk and floor and skirting junctions, and the usual reasons a site gets in touch are perimeter gaps outside the sealant’s range and existing joints on a refurb that need cutting out and resealing. Whoever orders the work in Cross, the brief is normally the same: a clear scope, tidy work and joints that don’t fail again.

External sealing around Cross depends on dry faces and the right temperature. A little flexibility in the programme lets external joints go in on suitable days.

Building owners and contractors get the same cover: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

Where
Cross (HS2)
Wider area
Na h-Eileanan Siar
Guarantee
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

After the work

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. Our advice:

  • Allow flexibility for external sealing in damp or cold weather
  • Brief following trades on areas that have been sealed
  • Check frame gaps are within the sealant’s range before sealing
  • Note which sealant went where at handover

A new structure shifts as it loses construction moisture. Flexible sealants in the right joints handle normal movement while rigid fillers and caulk can crack where movement is larger. If that happens, let us know.

A missed perimeter seal on one window can wet the reveal and the plaster inside. On a new building that means remedial work after decorating, and a delay to handover. Checking perimeters before internal finishes go on avoids it.

Cost factors for mastic packages

What shapes the price:

  • Site requirements such as inductions and permits
  • Quantities, in metres or numbers
  • Any access equipment needed
  • How much existing material needs removing

Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.

What to include in your enquiry

The more we know, the firmer the quote. When you get in touch, include:

  • Photos of the joints, close up and from further back
  • What the building is and how it’s used
  • Asbestos survey details if the building is older
  • Access details, including height

Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, call 01277 525 020 or send details through our quote form.

Your questions answered

Do you work on the island where Cross is?

Yes, Cross is within the area we cover. We cover the whole of Scotland. Ferry times and the weather set the plan, so we ask for photographs and a full list first.

Our building in Cross is near the coast: does that change the sealant?

It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.

How do we ask for a quote?

It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. The first step only needs photographs and a postcode.

Do you install fire-rated sealant as part of a package?

Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested details. Fire-stopping design and sign-off sit with the designer and building control.

Can you send site paperwork?

Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.

Can you handle several sites?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Do you offer coloured sealant?

Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.

Different surfaces, different methods

Fire-rated sealant where specified

Not every penetration suits a sealant. Collars, wraps, batts and boards are specified for other services so we’ll flag where the detail needs something different. Record requirements are agreed with the quote.

Internal decorators’ caulk

Caulking is often done in a hurry by whoever’s on site. A neat, consistent caulk line makes the decorators’ job quicker and reduces snags.

Should maintenance staff do it?

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

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.

Our process

Working in a building that stays open takes some planning. We sign and contain the area we are in, keep walkways clear and move on in phases so staff and visitors can carry on around us. For a building near Cross, directions, keys and a contact on the day are worth sorting early. We’ll confirm the plan with the fixed quote.

  1. First we look at the scope on site or from drawings.
  2. You receive a fixed quote covering scope, products and sequence.
  3. Site paperwork is confirmed and our CSCS-carded applicators are inducted.
  4. We seal plot by plot or floor by floor in line with the programme.
  5. Problems we find, such as oversized gaps, are raised straight away.
  6. The package is closed out, snags cleared and backed by our 12-month guarantee.

Preparing the site

  • Warn occupants and staff about the work
  • Send asbestos survey details if the building is pre-2000
  • Let us know about inductions and permits

Request a quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. To get it moving, speak to us on 01277 525 020 or email the details over.

Get a price

Read more

Contractors’ notes for Cross

Cross sits close to the coast, within about 2 miles. Facades and window perimeters on coastal schemes take more wind-driven rain, and salt air nearer the shore, and the sealant, primer and backing need choosing with that in mind. Being on an island, Cross means planning around ferry times as well as the weather. Drawings and the programme let us bring every sealant, primer and backing rod the package needs.

A facade joint near Cross lasts when width, depth and backing are right, not just the finish. Sites around Cross get mastic sealed to the drawings and the programme, nothing improvised.

Cross (Gaelic: Cros) is in Na h-Eileanan Siar. Anywhere in HS2, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. 87 places across Na h-Eileanan Siar fall within our area, including Cross.

Business premises anywhere in HS2 are within our area. Among the streets we cover are Rathad Chros-Sgiogarstaigh, Back Street and New Street. If your building is just outside Cross, we cover North Dell (1 mile west), Nis (1 mile east), Ness (1 mile east), Lionel (2 miles north-east) and Lìonal (2 miles north-east). Where a site is remote or on an island, travel and materials need planning ahead, so the full address helps from the start.

What’s near Cross

Well-known places in the area include Dell Mill (less than half a mile west). For a walk, there’s Loch Langavat.

Map of Cross © OpenStreetMap contributors
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