Orkney Islands · Scotland
Grimness Window Mastic
Window mastic in Grimness from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- White mastic on grey or black frames
- Leaking joints at the ends of sills
- Whistling draughts around closed windows
How we handle window mastic in Grimness
Frames and walls don’t move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. If you’re dealing with rain getting in at the frame or under the sill and a bead that doesn’t match the frame, we can help, whatever the surface.
Mastic can only go onto a dry joint, so outside work in Grimness depends on the weather. Tell us about access to all the windows and doors, upstairs included.
Our work is backed for twelve months.
- Where
- Grimness (KW17)
- Wider area
- Orkney Islands
- Cover
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Aftercare tips
Aftercare is simple:
- Keep paint and stain on wooden frames in good order
- Wash the frames with mild soapy water
- Walk round the house once a year and look at the joints
- Avoid blasting the frames with a pressure washer
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What else we do in Grimness
What happens if it’s left?
Resealing frames is a short job: the visit takes most of a day for a typical house, less for a few frames. Wait for damp to appear and there may be plaster and decorating to sort out too. Around Grimness, water from a failed joint in an older stone home can soak into timber and plaster.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please drop us a line at info@mrmastic.co.uk and we will talk you through it.
What you get with us
- Arbo and Everbuild products
- 180+ five-star Google reviews
- White, clear, grey or coloured to suit, where the product allows
- A sealant colour to suit the surroundings
See our cost guide and customer reviews.
Different surfaces, different methods
Aluminium frames
Aluminium needs a sealant that bonds to coated metal. Neutral-cure sealant is the safe choice.
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Around Grimness, distance and access matter more than parking. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Before we arrive
- Mention any tricky access
- Mention any sign-in or site rules at work premises
- Tell us if parking is tricky
Ask for a quote
For window mastic in Grimness, 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
Grimness: your questions answered
Is window mastic in a coastal place like Grimness any different?
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.
Will you come out to Grimness?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland, including the islands, where work is planned around ferry crossings. Just mention lanes, gates or anything else about the route when you book.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you work for landlords and businesses?
Yes. As well as householders, we work for landlords, agents, businesses and hotels across the Orkney Islands.
I rent my home. Can I book you?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can new window sealant be painted?
Not usually, if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Should I try it myself first?
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.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Do you need window mastic in Grimness?
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, while a joint packed solid cannot stretch. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Rushed sealant from a window installation
- Mastic that is falling out in pieces
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
In and around Grimness, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Comparing quotes
- Whether they seal over old material or remove it
- What product goes in the joint
- Who does the work, and how experienced they are
- What insurance they hold
For landlords and businesses
If you manage several properties in or around Grimness, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Windows and doors in Grimness
Grimness is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Sash and case windows are common in older Scottish homes, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
Whether the job is in Grimness itself or nearby, the right material for each joint matters as much as a neat finish.
Grimness is about 11 miles south of Kirkwall, in the Orkney Islands. Anywhere in KW17, we can carry out window mastic at your property. Across the Orkney Islands, we cover 51 places, and Grimness is one of them.
Postcode districts we cover here for window mastic: KW17. Grimness sits on or near the B9044, so getting to you is simple. Neighbouring places we cover for window mastic include Burray Village (1 mile north), St Margaret's Hope (2 miles west), Widewall (3 miles south-west), St Mary's (5 miles north) and Upper Sanday (7 miles north-east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
Near you in Grimness
Other landmarks nearby include W Hourston Blacksmiths Museum (1.8 miles west). Not far away are Echna Loch and Ward Hill.