Highland · Scotland
Window Mastic in Altnaharra
Mastic around window and door frames, sills and patio doors in Altnaharra, with a 12-month guarantee on every job. Ask us for a quote.
- Leaking joints at the ends of sills
- Black, perished sealant on frames
- White mastic on grey or black frames
What we do, step by step
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of frames, longer for a whole house. In smaller Scottish places, parking is usually less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention any leaks or damp you’ve noticed
How to get a quote
For window mastic in Altnaharra, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
How we handle window mastic in Altnaharra
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. If you have cracked or shrunken mastic around the frame and gaps between the frame and the inside reveal, we can help, on window sills, timber windows & doors and patio & French doors alike.
In and around a place like Altnaharra, homes range from older stone-built cottages to newer houses. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Altnaharra (IV27)
- Wider area
- Highland
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Window mastic in Altnaharra: local notes
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
Whether the job is in Altnaharra itself or nearby, the right material for each joint matters as much as a neat finish.
Altnaharra is about 39 miles south-west of Thurso, in Highland. Altnaharra gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. 253 places in Highland are on our list.
Every address in IV27 is within our area for window mastic, from the main roads to the quietest streets. Nearby, we also carry out window mastic in Tongue (13 miles north), Melness (17 miles north), An Luirg (18 miles south), Am Blàran Odhar (19 miles north-east) and Innis nan Lìon (21 miles south). Island and remote addresses take a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
Local landmarks in Altnaharra
Green spaces nearby include Loch Eileanach and Meall an Fhuarain.
What we cannot put right
New sealant cannot fix everything, and we will tell you before work begins. It will not solve:
- A sash or casement that won’t close properly
- Penetrating damp from a failed cavity tray or render
- Draughts through the window seals rather than the frame
Not sure which it is? You can send an email to info@mrmastic.co.uk and we will tell you honestly before booking.
Joints and surfaces we work on
- Aluminium frames
- Composite doors
- uPVC windows
- Window sills
- Timber windows & doors
- Patio & French doors
Can I do it myself?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
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.
Why it’s worth doing now in Altnaharra
If you’re painting or rendering, reseal at the same time. Fresh joints finish the job neatly. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why us?
- A choice of colours where the product allows
- Colour agreed with you before any work starts
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
Landlords, agents and businesses in Altnaharra
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Landlords and letting agents in Altnaharra can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
What we are called out for in Altnaharra
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
These are the problems we are asked about most:
- Rain getting in at the frame or under the sill
- Cracked or shrunken mastic around the frame
- Leaking joints at the ends of sills
- Mastic that’s falling out in pieces
Around Altnaharra, as everywhere, window mastic is only as good as the preparation behind it.
Comparing quotes
- How much experience the applicator has
- What preparation is included
- Whether VAT is included
- What happens if they find a problem under the old sealant
Also near Altnaharra
More services for Altnaharra
Your questions about window mastic in Altnaharra
What guarantee comes with window mastic in Altnaharra?
All our work, in Altnaharra and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Is Altnaharra within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Just mention lanes, gates or anything else about the route when you book.
Can you do the inside joint as well?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We do one or both.
Is there any odour?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Where is Mr Mastic based?
We work from Crawley. We cover Altnaharra and the rest of Highland.
Do you have sealant for grey or black windows?
Normally, yes. Tell us the frame colour when you get in touch and we will match it as closely as we can.
Can I paint over the new sealant?
It depends on the sealant. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you’re decorating and we will choose accordingly.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Quotes for window mastic in Altnaharra
The price is agreed before any work begins. It’s based on:
- The amount of work
- Whether the work is at height
- The type of sealant required
- Any working-time requirements on site
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What we need to know
Before you ask for a quote, have a think about:
- Roughly how big the job is
- Photos by email, if that’s easy
- What’s wrong with the joints now
- Any access issues, like height or stairs
We quote each job on its own, so the first step is telling us about yours. Simply email us at info@mrmastic.co.uk and describe the job, and pictures are welcome.