Highland · Scotland
External Mastic in Gergask
External mastic for Gergask, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
How we handle external mastic in Gergask
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. If you have sealant pulling away from one side of the joint and old sealant gone brittle and cracked, we can put it right.
Across smaller places in Scotland, stone and harled cottages, farm buildings and newer houses often stand exposed to wind and rain. Outside joints on exposed walls work hard.
Big or small, it’s backed by our 12-month guarantee in Gergask and across Highland.
- Place
- Gergask (PH20)
- Wider area
- Highland
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What we are called out for in Gergask
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
The problems people usually mention when they call are:
- Panel joints letting water in
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
If you live in an older home near Laggan Parish Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Questions to ask before you book
- How the surfaces are prepared before sealing
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why
- What happens if the job turns out different
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation and we leave things clean and tidy. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- 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.
Before we arrive
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
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 work begins.
Advice
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Exposed walls in smaller Scottish places take a lot of wind and rain, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
What it costs depends on the size of the job, 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.
Why choose Mr Mastic in Gergask
- Arbo and Everbuild products
- An ARBOMaster approved applicator
- Fully insured
- 12-month guarantee on every job
Read what affects the cost or our reviews.
Quotes for external mastic in Gergask
Some jobs are bigger than they look, and some smaller. The main factors:
- The number and length of the joints
- Whether the work is at height
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Ask us for a quote and we will go through it with you.
What we need to know
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- Whether it has been sealed before
- Where the property is
- A few pictures by email, if you can
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
Towns and villages near Gergask
What else we do in Gergask
Surface by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Landlord and commercial work in Gergask
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
What external mastic looks like in Gergask
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. The west of Scotland is wetter than the east, which means movement joints and outside wall joints has to cope with a lot of rain.
In and around Gergask, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Gergask is about 31 miles south of Inverness, in Highland. Whether you’re in the middle of Gergask or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Gergask is one of 253 towns and villages in Highland we cover. You can also see our page for Dundee, roughly 62 miles from Gergask.
We cover every part of PH20 for external mastic and the streets around it. Nearby, we also carry out external mastic in Laggan (1 mile south-east), Etteridge (5 miles east), Dalwhinnie (6 miles south), Newtonmore (7 miles north-east) and Kingussie (10 miles north-east). For island and remote addresses, the job takes a little more planning, so let us know when you get in touch.
Near you in Gergask
Nearby you’ll also find Cluny Castle (2.1 miles east). Open spaces near Gergask include Loch Caoldair and Creag Bhuidhe.
Your questions about external mastic in Gergask
Is Gergask within the area you cover?
Yes, Gergask is covered. We work across all of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
Is there a guarantee on external mastic in Gergask?
All our work, in Gergask and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
How do you reach high-level joints?
It depends on the building. Where joints can be reached safely, we will do them. Tell us about the building and we’ll confirm what access is needed.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.