Highland · Scotland
External & façade joints in Haster, Highland
External mastic for Haster, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked joints where brick meets render or frames
- Rain getting behind render or cladding at a joint
- Joints where the bead has come unstuck
How we handle external mastic in Haster
Low-level joints can generally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what access is needed. If you are dealing with damp patches traced to an open external joint and weathered mastic that no longer stretches, we can help.
Outside joints can only be sealed when they’re dry, so work in Haster depends on the weather. Let us know about access to every wall and roofline.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Haster (KW1)
- Region
- Highland
- Guarantee
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Your questions about external mastic in Haster
Do you cover smaller places like Haster?
Yes, Haster is covered. Our work covers the whole of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Does living near the coast affect external mastic in Haster?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you work at height?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we will confirm the access.
Are you insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
When is the sealant fully cured?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so the joint does not draw the eye.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages to suit the site.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- How many areas need sealing
- When we can work, for business premises
- The product the joint needs
- Whether old sealant or filler has to be cut out
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and give you a clear price before we start.
What we need to know
Photos help, but a description is a good start. Please mention:
- Where the property is
- If someone has resealed it before
- A few photos by email, if you can
- How many joints, rooms or windows are involved
Every job is quoted individually. Simply drop us a line at info@mrmastic.co.uk and describe the job.
When to call us in Haster
Some movement joints have been pointed up with mortar. The joint can’t move, so the wall cracks somewhere else instead.
Keep an eye out for these signs:
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
Schools such as Wick High School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
- Whether all the old sealant comes out first
- Which sealant they’ll use, and why
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- An ARBOMaster approved applicator
- Fully insured
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
How the visit works
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. For a place like Haster, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
Ask for a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job.
Advice
Outside joints around Haster
Haster is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s 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.
Rented homes near Wick station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Haster is about 17 miles south-east of Thurso, in Highland. Every kind of property in Haster is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 253 places across Highland, from the larger towns to small villages.
All of KW1 is covered for external mastic. We cover properties on Fountain Square and Tannach Road. We also cover the places around Haster: Reiss (2 miles north), Wick (3 miles east), Whiterow (3 miles south-east), Ackergillshore (3 miles north-east) and Staxigoe (4 miles east). If you’re somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Landmarks near Haster
Haster’s nearest station is Wick station, roughly 2.1 miles east. Nearby you will also find Wick Town and County Hospital (2.3 miles east) and Castle of Old Wick (3.1 miles south-east). Green spaces nearby include Loch Hempriggs.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What else we do in Haster
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.