North Lanarkshire · Scotland
Wishaw Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Wishaw and across North Lanarkshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- White mastic on grey or black frames
- Leaking joints at the ends of sills
- Old mastic that has gone black or come away
How we handle window mastic in Wishaw
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on window sills, patio & French doors and composite doors, and people most often call us about mastic that’s falling out in pieces and cracked or shrunken mastic around the frame.
Wind and rain in a Scottish town like Wishaw find any gap around a frame. The windows facing the weather are generally the first to leak.
Your job is guaranteed for a year, as with all our work.
- Location
- Wishaw (ML2, ML1)
- Wider area
- North Lanarkshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Why deal with it now?
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Private landlords in a town like Wishaw must keep homes wind and watertight under the Repairing Standard. Sorting failed joints early is easier than dealing with a tenant’s complaint.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Why us?
- Anti-fungal silicone where joints get wet
- Any old sealant cut out fully, not covered over
- Every job guaranteed for a year
- A choice of colours where the product allows
Read how sealant jobs are priced and customer reviews.
Surface by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall and tooled smooth.
Window mastic in Wishaw: local notes
Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
For site and facilities teams at buildings such as St Aidan's High School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Wishaw station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Wishaw is about 6 miles east of Hamilton, in North Lanarkshire. Homes, rented property, offices and hotels in Wishaw can book us for window mastic. Every job comes with our 12-month guarantee. Wishaw is one of 89 places in North Lanarkshire where we work. Our Glasgow page covers work nearby.
Jobs for window mastic in ML2 and ML1 is quoted and booked the same way as anywhere else. We cover properties on Main Street, Market Square and Station Road and the roads around them. Main roads around Wishaw include the A71 and A721. Nearby, we also carry out window mastic in Pather (1 mile south), Dimsdale (1 mile south-east), Coltness (1 mile north), Gowkthrapple (1 mile south) and Netherton (1 mile south-west). Further out, we also cover Motherwell (3 miles north-west), Cumbernauld (12 miles north), Coatbridge (7 miles north-west), Airdrie (7 miles north), Bellshill (5 miles north-west) and Kilsyth (15 miles north). Wishaw is among the bigger towns we cover in North Lanarkshire.
Landmarks near Wishaw
In Wishaw, that means homes and buildings near The Wishaw Malt pub and St. Aidan's Primary School. There’s a railway station in Wishaw itself: Wishaw station. Well-known places in the area include Murdostoun Castle (2.1 miles north-east) and Brandon Shopping Centre (2.9 miles west). Green spaces nearby include Allanton House lake and Baron's Haugh RSPB Reserve.
Signs you need window mastic in Wishaw
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Most people get in touch when they notice something like this:
- Draughty joints inside around the window
- Mastic that is falling out in pieces
- Whistling draughts around closed windows
- Hard, cracked sealant around windows
Homes close to Old Parish Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- Who turns up on the day
- What happens if the job turns out different
How we quote for window mastic
Jobs vary more than people expect. The main factors:
- The type of sealant required
- The number of rooms or windows
- The old material and how stubborn it is
- Whether the work is at height
What you pay reflects the work, not guesswork. That is why we ask about the job first and send you a clear quote before any work starts.
What to tell us for a quote
To make quoting easier, let us know:
- How many joints, rooms or windows are involved
- The address or postcode of the job
- How we’d reach the joints
- A few pictures by email, if you can
There’s no standard price list. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
FAQs for Wishaw
Can you help a landlord with a rental near Wishaw station?
Yes, rental work is part of what we do. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before work begins.
Is Wishaw in your area for window mastic?
Yes. Our work covers the whole of Scotland, and Wishaw is part of that. Just email us at info@mrmastic.co.uk with a few details of the job, and we will send you a clear quote.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints.
How many windows can you do in a day?
A handful of frames is a short visit, while a whole house takes longer. You will get a timescale with the quote.
Does the work come with a guarantee?
Yes. Every job comes with our one-year guarantee, and we are ARBOMaster approved applicators.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How do I get a quote for window mastic in Wishaw?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Walk round the house once a year and look at the joints
- Ventilate rooms so frames do not stay wet inside
- Keep paint and stain on wooden frames in good order
- Use gentle cleaners on frames and sealant
Try not to touch the new joint while it cures, for as long as we advise. Keep jet washers away from the frames.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
When something else is needed
To be straight with you, there are a few things sealant will not fix:
- Penetrating damp from a failed cavity tray or render
- Draughts through the window seals rather than the frame
- Faulty window hardware
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly.
What we seal
- Patio & French doors
- uPVC windows
- Composite doors
- Aluminium frames
- Window sills
- Timber windows & doors
More services for Wishaw
What we do, step by step
A visit follows a simple pattern: 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. A visit in Wishaw needs three things planned: access, parking and where the work is. Outdoor jobs need a dry day, so they can move if the weather turns.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right 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
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
How to get a quote
If you are in Wishaw and need window mastic, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.