Midlothian · Scotland
Danderhall External Mastic
External mastic for Danderhall and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Gaps where render, brick and frames meet
- Failed sealant between panels on a façade
- Old sealant gone brittle and cracked
Walls and rooflines in Danderhall
Danderhall is within about 3 miles 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. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
Rented homes near Shawfair station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Newton Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Danderhall is about 2 miles north-west of Dalkeith, in Midlothian. Across the EH22 area, we can carry out external mastic at your property. Our Midlothian coverage runs to 33 places, Danderhall among them.
Work in EH22 is quoted and booked the same way as anywhere else. That includes homes and businesses on Newton Church Road, Forth View Crescent and Danderhall Crescent. If you’re just outside Danderhall, we cover Fernieside (1 mile west), Ferniehill (1 mile west), The Wisp (1 mile north-west), Gilmerton (1 mile south-west) and Moredun (1 mile west). Within a short drive, we also cover Bonnyrigg (3 miles south), Penicuik (7 miles south-west), Loanhead (3 miles south-west), Gorebridge (5 miles south-east), Newtongrange (4 miles south-east) and Mayfield (4 miles south-east). Danderhall is one of the larger places we cover in Midlothian.
Local landmarks in Danderhall
In Danderhall, that means homes and buildings near Drum Park, among other places. The nearest railway station is Shawfair station, roughly 0.8 miles north-east of the centre. Other landmarks nearby include Natural History Collections (2.6 miles west) and Royal Infirmary of Edinburgh (1.3 miles north-west). Not far away are Nether Hill and The New Leaf Co-op.
External mastic for homes and businesses in Danderhall
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint does not stand out. We are often asked to deal with sealant that has lost its bond to the brick or render and cracked joints where brick meets render or frames, on concrete & block, façade panels and brickwork movement joints.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. Newer houses need their movement joints and roofline trims kept sound.
Our work is backed for twelve months.
- Place
- Danderhall (EH22)
- Wider area
- Midlothian
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Danderhall: your questions answered
Does the coastal weather in Danderhall affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
I let a flat near Shawfair station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose. A flexible sealant is the right fill.
Can you seal joints between two different materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. The colour is chosen to suit.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Do the sealants smell?
Some sealants have a smell while they cure. Opening a window helps.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Nearby places to Danderhall
More services for Danderhall
What we can’t put right
It helps to know what we cannot do:
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
- Cracks in the bricks or render themselves, away from the joints
If you’re not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer.
Joints and surfaces we work on
- Joints between brick and frames
- Façade panels
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep soil, plants and ivy away from the joints
- Make sure movement joints aren’t pointed over
- Look over the joints every year, ideally after winter
- Get split or bare joints resealed while the damage is small
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
Quotes for external mastic in Danderhall
You’ll get a clear quote before we start. It’s based on:
- How many rooms, windows or areas are involved
- Whether the work is at height
- The number and length of the joints
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
What to tell us for a quote
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Whether it has been sealed before
- How we’d reach the joints
We don’t publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, email us at info@mrmastic.co.uk.
How it works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes anything from a few hours to several days, depending on the building. For a place like Danderhall, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Clear the area around the work
- Mention if the joints have been sealed before
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Related advice
Why deal with it now?
Running new sealant over the old bead rarely lasts. New sealant does not 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.
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Danderhall
- Trusted Arbo and Everbuild sealants
- A sealant colour to suit the surroundings
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
Read what affects the cost or what customers say.
Signs you need external mastic in Danderhall
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Most people get in touch when they notice something like this:
- Joints pointed up with cement by mistake
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
Managing a site like Castlebrae Community High School? Then larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Which colour the sealant will be
- How long to leave it before use
- What the quote includes, VAT included or not
- Whether all the old sealant comes out first