Orkney Islands · Scotland
External & façade joints in Germiston, Orkney Islands
We cover Germiston for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Cracked joints where brick meets render or frames
- Joints pointed up with cement by mistake
- Water getting into walls through failed joints
External mastic in Germiston, done properly
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. We work on render & cladding joints, brickwork movement joints and façade panels, and people most often call us about moss and dirt in joints with no sealant left and movement joints with cracked, split or missing sealant.
Outside joints can only be sealed when they’re dry, so work in Germiston depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
You are covered for a year from the day we finish. If anything is not right with it, send an email to info@mrmastic.co.uk.
- Location
- Germiston (KW16)
- Region
- Orkney Islands
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Landlords, agents and businesses in Germiston
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
If you manage several properties in or around Germiston, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
When to call us in Germiston
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 can’t stretch and rips as the joint opens.
Signs it’s time to call us include:
- Failed seals between different materials
- Sealant that has lost its bond to the brick or render
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
For jobs in and around Germiston, choosing the right material for each joint is as important as a tidy finish.
What to look for in a quote
- How hidden problems are handled
- What product goes in the joint
- What the quote includes, VAT included or not
- What insurance they hold
Leave it or put it right?
Running new sealant over the old bead rarely lasts. New sealant does not bond well to old, weathered sealant, so the old joint is cut out fully first. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why book with us
- Full insurance on every job
- White, clear, grey or another colour, product permitting
- 180+ five-star Google reviews
- Trusted Arbo and Everbuild sealants
See our cost guide and our reviews.
Germiston questions
Do you cover Germiston for external mastic?
Yes, Germiston 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, and we’ll give you a clear price.
Does the coastal weather in Germiston affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
How long should I leave it?
It depends on the product and the conditions. We tell you how long to leave it before we go.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What does external mastic cost?
It depends on the job, so we quote each one individually. For a quick quote, send an email to info@mrmastic.co.uk with a short description of the job.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We will give you a better idea when we quote.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
What else we do in Germiston
When it is not the sealant
A few problems are outside what sealant work can do:
- Structural movement, which needs a surveyor or engineer
- Rising or penetrating damp from elsewhere in the wall
- Cracking across the wall rather than at a joint
If in doubt, drop us a line at info@mrmastic.co.uk and we will say what we think before booking.
Where we work in Germiston
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Concrete & block
- Copings & trims
- Render & cladding joints
Surface by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and protects the render itself.
How it works
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Outside jobs in Germiston need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors isn’t affected.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you are ready, send an email to info@mrmastic.co.uk.
Related advice
External mastic in Germiston: local notes
Germiston is within about 2 miles of 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 where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
Around Germiston, as everywhere, external mastic is only as good as the preparation behind it.
Germiston is about 7 miles west of Kirkwall, in the Orkney Islands. We provide external mastic to homes and businesses in Germiston. 51 places in the Orkney Islands are on our list.
Jobs for external mastic in KW16 is quoted and booked the same way as anywhere else. We also cover the places around Germiston: Heddle (1 mile north-east), Finstown (2 miles north-east), Grimbister (2 miles north-east), Stenness (2 miles west) and Clouston (3 miles west). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Near you in Germiston
Green spaces nearby include Loch of Wasdale and Hill of Heddle.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Have failed joints looked at early
- Keep movement joints as flexible joints, not mortar
- Avoid pressure-washing directly into sealant joints
- Keep soil, plants and ivy away from the joints
Do not paint over the new sealant unless we have said the product is paintable. Many exterior sealants are not designed to be painted, and paint can crack as the joint moves.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.