Highland · Scotland
External & façade joints in Hastigrow, Highland
Specialist external mastic for Hastigrow: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
How we handle external mastic in Hastigrow
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. Typical jobs include plants rooting in failed movement joints and hard, crazed mastic that has stopped moving, across brickwork movement joints, render & cladding joints and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Hastigrow depends on the weather. Let us know about access to every wall and roofline.
Big or small, it’s backed by our 12-month guarantee.
- Place
- Hastigrow (KW1)
- Region
- Highland
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
The process
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from a few hours to several days, depending on the building. Outdoor work around Hastigrow depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Work indoors isn’t affected.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we will come back to you with a quote.
Advice
Walls and rooflines in Hastigrow
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
Around Hastigrow, as everywhere, external mastic is only as good as the preparation behind it.
Hastigrow is about 10 miles south-east of Thurso, in Highland. Every kind of property in Hastigrow can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Hastigrow is one of 253 towns and villages in Highland we cover for external mastic.
Here we cover the KW1 postcode area for external mastic. Hastigrow is on the B876, so it’s easy for us to get to with everything needed for external mastic. Close by, we work in Bower (2 miles north-west), Gillock (3 miles west), Watten (4 miles south), Keiss (5 miles east) and Reiss (6 miles south-east). For island and remote addresses, a little more planning is needed.
Near you in Hastigrow
Open spaces near Hastigrow include Loch Watten.
Signs you need external mastic in Hastigrow
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Common reasons people contact us are:
- Gaps where render, brick and frames meet
- Plants rooting in failed movement joints
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
Whether the job is in Hastigrow itself or nearby, the right material for each joint matters as much as a neat finish.
What to look for in a quote
- How hidden problems are handled
- How much experience the applicator has
- Is the old sealant removed completely?
- What the quote includes, VAT included or not
What else we do in Hastigrow
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Landlord and commercial work in Hastigrow
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for.
We also work for property managers and facilities teams in Hastigrow and across Highland. Several sites can be quoted together, and we’re fully insured.
How to look after the new joints
After the cure time, these simple habits help:
- Ask before painting over external sealant
- Fix overflowing gutters above sealed joints
- Tell anyone working on the walls about the movement joints
- Look over the joints every year, ideally after winter
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Hastigrow: your questions answered
Is Hastigrow in your area for external mastic?
Yes, Hastigrow is within the area we cover. We work across all of Scotland. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
What guarantee comes with external mastic in Hastigrow?
All our work, in Hastigrow and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply email us at info@mrmastic.co.uk.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher ones, send details and we’ll confirm the access.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
I’m a tenant. Can you help?
Of course. Check with your landlord; we can send the quote to them too.
Are you insured?
Yes. We’re fully insured.
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- The old material and how stubborn it is
- Access and height
- Any mould that needs treating
- The amount of work
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Helping us quote
When you call or email, it’s useful to know:
- If someone has resealed it before
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- Where the property is
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, send an email to info@mrmastic.co.uk.
What happens if it’s left?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and give you a clear quote before any work starts.
Why choose Mr Mastic in Hastigrow
- White, clear, grey or another colour, product permitting
- Every job guaranteed for a year
- 4.9 on Google from 180+ five-star reviews
- Colour agreed with you before we start