Highland · Scotland
External & façade joints in Keiss, Highland
Movement joints in Keiss need attention? We cut out the old, prepare the joints and apply the right sealant.
- Brick movement joints where the sealant has split
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
How we handle external mastic in Keiss
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the line blends in. We work on concrete & block, render & cladding joints and copings & trims, and the jobs we see most are panel joints letting water in and movement joints with cracked, split or missing sealant.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. On newer homes, the movement joints and roofline trims are what need watching.
Every job comes with our 12-month guarantee, wherever you are in Highland.
- Place
- Keiss (KW1)
- Region
- Highland
- Cover
- One year on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How the job changes by surface
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
Keiss: your questions answered
Do you cover smaller places like Keiss?
Yes, Keiss is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Keiss in your area for external mastic?
Yes, Keiss is within the area we cover. Our work covers the whole of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Do you use backing rod?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
How long does the job take?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including the preparation. We will confirm how long when we quote.
How do you reach high-level joints?
It depends on the building. Tell us the height, the number of joints and what’s below them.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Get split or bare joints resealed while the damage is small
- Fix overflowing gutters above sealed joints
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
Should I try it myself first?
The difference is mostly in the preparation and the 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.
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.
More services for Keiss
Why deal with it now?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the problem grows beyond the joint itself. In a place like Keiss, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why book with us
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
- Colour agreed with you before we start
- Homes, businesses and hotels
Read our cost guide and what customers say.
How the visit works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Around Keiss, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Clear the area around the work
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For external mastic in Keiss, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Read more
Quotes for external mastic in Keiss
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- How many areas need sealing
- The old material and how stubborn it is
- The type of sealant required
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Any previous sealing or DIY work
- Any access issues, like height or stairs
- Whether it’s a home or a business
- Pictures of the joints, sent by email
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, drop us a line at info@mrmastic.co.uk.
Outside joints around Keiss
Keiss is within about 1 mile of 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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
In the older streets around Church of Scotland, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Keiss is about 15 miles east of Thurso, in Highland. We carry out external mastic for homeowners, landlords and businesses in Keiss, as part of our work across Highland. Our Highland coverage runs to 253 places, Keiss among them.
We work across KW1 for external mastic. We cover properties on High Street, South Street and Robertson Crescent and the roads around them. Other places close to Keiss include Reiss (4 miles south), Ackergillshore (4 miles south), Hastigrow (5 miles west), Staxigoe (6 miles south-east) and Haster (6 miles south). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Near you in Keiss
Nearby you will also find Caithness Broch Centre (2 miles north-east) and Keiss Castle (0.7 miles north-east). For a walk, there’s Loch of Wester.
Signs you need external mastic in Keiss
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.
If you can see any of these, it’s time to have the joints looked at:
- Weeds or debris growing in open joints
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Weathered mastic that no longer stretches
Around Keiss, as everywhere, external mastic is only as good as the preparation behind it.
What to look for in a quote
- What guarantee comes with the work
- Whether they’re fully insured
- When the joint can take water or movement
- What preparation is included