Na h-Eileanan Siar · Scotland
Ness External Mastic
External mastic for Ness, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Old sealant gone brittle and cracked
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
External mastic for homes and businesses in Ness
On houses, flats and commercial buildings across Ness, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean joint faces and the right depth. Typical jobs include gaps where render, brick and frames meet and failed sealant between panels on a façade, across concrete & block, façade panels 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.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Ness (HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Looking after it afterwards
To keep the joints looking good and working properly:
- Wash walls gently around the sealant
- Ask before painting over external sealant
- Tell anyone working on the walls about the movement joints
- Make sure movement joints are not pointed over
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.
Landlords, agents and businesses in Ness
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
External mastic in Ness: local notes
Ness is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
For jobs in and around Ness, choosing the right material for each joint is as important as a tidy finish.
Ness is about 18 miles north of Stornoway, in Na h-Eileanan Siar. Anywhere in HS2, we can carry out external mastic at your property. 87 places in Na h-Eileanan Siar are on our list.
Here we cover the HS2 postcode area for external mastic. Other places close to Ness include Nis (1 mile north), Cross (1 mile west), Sgiogarstaigh (1 mile east), Lionel (1 mile north) and North Dell (2 miles west). For island and remote addresses, the job takes a little more planning.
Near you in Ness
Well-known places in the area include Ness Heritage Centre (1 mile north). Green spaces nearby include Loch Langavat.
FAQs for Ness
Can you do external mastic in Ness?
Yes, Ness is within the area we cover. Our work covers the whole of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job.
Is external mastic in a coastal place like Ness 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.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we will quote it together.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Why is there a gap in my brick wall?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Signs you need external mastic in Ness
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
In and around Ness, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- Who turns up on the day
- What preparation is included
- Whether all the old sealant comes out first
- When the joint can take water or movement
Quotes for external mastic in Ness
Your quote is based on your job. We look at:
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- Whether the work is at height
- Which sealant suits the joint
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- Whether it’s a home or a business
- A few pictures by email, if you can
- Where the property is
- Roughly how big the job is
We quote each job on its own. Simply send an email to info@mrmastic.co.uk and describe the job and send pictures if you have them.
Places near Ness
Other services in Ness
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a few hours to a few days, depending on the length of joint and the access. For a place like Ness, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Tell us if parking is tricky
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
Getting a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Related advice
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the job changes by surface
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.