Na h-Eileanan Siar · Scotland
External & façade joints in Cross, Na h-Eileanan Siar
Sealing brickwork movement joints, render, cladding and façade joints for Cross, backed by a one-year guarantee. Ask us for a quote.
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
- Moss and dirt in joints with no sealant left
External mastic in Cross, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. Typical jobs include movement joints filled with mortar instead of sealant and failed seals between different materials, on brickwork movement joints, joints between brick and frames and copings & trims.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Gutter joints and wall joints take a battering.
A 12-month guarantee comes as standard, so you are covered after we’ve gone.
- Location
- Cross (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
We work for landlords and letting agents as well as householders. Resealing between tenancies keeps a property looking cared for.
When to call us in Cross
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
Signs it’s time to call us include:
- Joints where the bead has come unstuck
- Failed seals between different materials
- Weeds or debris growing in open joints
- Rigid filler in a joint that should flex
In and around Cross, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- What the quote includes, VAT included or not
- What preparation is included
- Who turns up on the day
- Which sealant they’ll use, and why
Also near Cross
What else we do in Cross
External mastic in Cross: local notes
Cross is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
Homes close to Church of Scotland include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Cross (Gaelic: Cros) is in Na h-Eileanan Siar. Whether you’re in the middle of Cross or further out, we cover external mastic for every kind of property. Cross is one of 87 places in Na h-Eileanan Siar we cover.
We cover every part of HS2 for external mastic and the streets around it. Streets in the area include Rathad Chros-Sgiogarstaigh, Back Street and New Street, all of which we cover. If you’re 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). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Local landmarks in Cross
A little further out are Dell Mill (within half a mile west). The countryside around Cross includes Loch Langavat.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
- Get split or bare joints resealed while the damage is small
- Leave the joints unpainted unless we’ve said otherwise
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Common questions in Cross
Is external mastic in a coastal place like Cross any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you cover Cross for external mastic?
Yes. Our work covers the whole of Scotland, and Cross is part of that. Just email us at info@mrmastic.co.uk with a few details of the job.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Pointing it stops it working. We will reseal it with a flexible sealant.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking, and it should be sealed with a flexible sealant.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Do you work for landlords and businesses?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels across Na h-Eileanan Siar.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How the visit works
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. It generally takes anything from a few hours to several days, depending on the building. For a place like Cross, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Mention any tricky access
- On commercial sites, let us know about site rules
- Let us know about parking restrictions
How to get a quote
We quote each job on its own. Simply drop us a line at info@mrmastic.co.uk and describe the job.
Read more
What we can’t put right
New sealant cannot fix everything, and we’ll tell you before we start. It won’t solve:
- Structural movement, which needs a surveyor or engineer
- Cutting new joints into brickwork, which is building work rather than sealant work
- Failed render or damaged cladding panels
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Surfaces we seal
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Façade panels
What affects the cost of external mastic
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- The size of the job
- When we can work, for business premises
- The old material and how stubborn it is
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- A few pictures by email, if you can
- If someone has resealed it before
- Access, such as stairs, a lift or height
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.