Argyll and Bute · Scotland
External Mastic in Ganavan
External mastic for Ganavan, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
- Joints pointed up with cement by mistake
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around Ganavan, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
External mastic for homes and businesses in Ganavan
Joints in render and cladding are easy to overlook until a damp patch appears. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. We work on render & cladding joints, joints between brick and frames and concrete & block, and people most often call us about leaking joints around cladding and façade panels and weathered mastic that no longer stretches.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
Every job is covered by a 12-month guarantee, wherever you are in Argyll and Bute.
- Location
- Ganavan (PA34)
- Wider area
- Argyll and Bute
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- Whether there’s mould to deal with
- When we can work, for business premises
- The number and length of the joints
- The type of sealant required
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, email us at info@mrmastic.co.uk for an honest opinion and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- The address or postcode of the job
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Deal with leaking gutters that soak the joints below
- Act on the first splits you see
- Walk round the building once a year and look at the joints
- Show decorators and builders where the movement joints are
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
How the job changes by surface
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Cladding and façade panels
If the façade has a specified sealant, that is what we use, or one the system allows. Tell us what the building has when you get in touch.
What happens if it’s left?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. In a place like Ganavan, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why book with us
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- White, clear, grey or coloured to suit, where the product allows
- Full insurance on every job
Read what affects the cost or what customers say.
DIY versus a professional finish
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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
What we do, step by step
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. In smaller Scottish places, parking is generally less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- Move anything stored near the joints
Ask for a quote
For external mastic in Ganavan, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Questions from Ganavan
Do you work for landlords with property near Oban station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Do you cover smaller places like Ganavan?
Yes. Ganavan is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Where are you based?
Mr Mastic is based in Crawley. We cover Ganavan and the rest of Argyll and Bute.
Do you work at height?
It depends on the building. Send us pictures and a rough idea of the height.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including preparation and clearing up. We’ll confirm how long when we quote.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so the joint between them must be flexible. We choose one that suits both surfaces.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Also in Ganavan
Ganavan buildings and the weather
Ganavan 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. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The west of Scotland is wetter than the east, so there’s plenty of rain for movement joints and outside wall joints to keep out.
Managing a site like Oban High School? Then its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Oban station? Then split movement joints are easy to miss on a rental until damp shows inside.
Ganavan is in Argyll and Bute. If you need external mastic in Ganavan, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We are based in Crawley and cover Argyll and Bute. Our Argyll and Bute coverage runs to 118 places, Ganavan among them. Glasgow is on our list too, around 61 miles away.
Every address in PA34 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Ganavan Sands and Ganavan Road or anywhere close by, we can help. Other places close to Ganavan include Dunollie (1 mile south), Dunbeg (1 mile north-east), Oban (2 miles south), North Connel (3 miles north-east) and Connel (3 miles east). For island and remote addresses, the job takes a little more planning.
Around Ganavan
The closest station to Ganavan is Oban station, roughly 1.7 miles south. Nearby you’ll also find Lorn and Islands Hospital (2.5 miles south) and Oban Museum (1.2 miles south). For a walk, there’s Barr Mòr and Lochan Dubh.