Orkney Islands · Scotland
Window & door mastic in Stromness, Orkney Islands
Mastic around window and door frames, sills and patio doors for homes and businesses in Stromness and across the Orkney Islands. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracked internal joints between frame and plaster
- Black, perished sealant on frames
- Whistling draughts around closed windows
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
About our window mastic in Stromness
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We are often asked to deal with rain getting in at the frame or under the sill and cracked sealant at the sill ends, on window sills, patio & French doors and timber windows & doors.
Outdoor sealant needs a dry surface, so window work around Stromness is planned around the weather, and longer journeys are planned in advance. Let us know about access to every frame, including any upstairs.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- Stromness (KW16)
- Wider area
- Orkney Islands
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Different surfaces, different methods
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.
Your questions about window mastic in Stromness
Does the coastal weather in Stromness 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.
Will you come out to Stromness?
Yes, Stromness is covered. Our work covers the whole of Scotland, islands included, and smaller places are part of that. Longer journeys are simply planned in advance.
Can resealing stop a draught around my window?
In many cases. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
How do I get a quote for window mastic in Stromness?
It depends on the job, so we quote each one individually. To get one, email us at info@mrmastic.co.uk with a short description of the job.
Can you do upstairs windows?
Normally, yes. We plan safe access before the job.
Is the work guaranteed?
Yes. Each job is covered for 12 months.
How to look after the new joints
After the cure time, these simple habits help:
- Keep drainage slots and sill grooves clear
- Keep solvents and bleach off the sealant
- Keep paint off silicone joints
- Look round the frames every year or so
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
What else we do in Stromness
Stromness homes and the weather
Stromness is close to 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 the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Island weather, with its wind and salt spray, is tough on the mastic around window and door frames.
If you look after a building such as stromness primary school, the mastic around its windows and doors needs looking after like any other building’s.
Stromness is about 12 miles west of Kirkwall, in the Orkney Islands. Every kind of property in Stromness is covered for window mastic. The work is guaranteed for a year. Stromness is one of 51 towns and villages in the Orkney Islands where we work.
All of KW16 is covered for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on Franklin Road, Manse Lane and Springfield Crescent or anywhere close by, our applicators can take on the job. With the A965 close by, Stromness is simple for us to get to for window mastic. We also cover Cairston (1 mile north-east), Clouston (3 miles north-east), Stenness (4 miles north-east), Hoy (4 miles south) and Wasbister (4 miles north-east). As one of the bigger places in the Orkney Islands, Stromness has homes, rented property and businesses of every kind. If you are somewhere remote, a little more planning is needed, so mention it when you ask for a quote.
What’s near Stromness
Well-known places in the area include Stromness Museum (less than half a mile south). For a walk, there’s Hill of Lynedardy and Brodgar RSPB Reserve.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Honest limits
It helps to know what we can’t do too:
- Draughts through the window seals rather than the frame
- Soft or decayed wood in the frame
- Condensation trapped between the panes
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Composite doors
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Window sills
How it works
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes anything from an hour or two to a full day, depending on how many frames there are. 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.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
- Tell us if parking is tricky
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
Common problems we fix in Stromness
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Signs it’s time to call us include:
- Black, perished sealant on frames
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
- Leaking joints at the ends of sills
Around Stromness, as everywhere, window mastic is only as good as the preparation behind it.
Questions to ask before you book
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Are they insured?
- What the quote includes, VAT included or not