Glasgow · Scotland
Penilee Window Mastic
Problem with your window and door frames in Penilee? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Gaps between the frame and the inside reveal
- Damp patches on the reveal after heavy rain
- Leaking joints at the ends of sills
Penilee: your questions answered
How do repairs to the shared parts of a tenement in Penilee get organised?
It normally goes through the owners together, or through the factor if the building has one. The Tenements (Scotland) Act 2004 sets the rules for common parts if the deeds do not.
Do you work for landlords with property near Hillington West station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we’ll give you a clear quote.
Will there be a smell?
There can be a smell while the sealant cures. Ventilation helps.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Where do you work from?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we’ll tell you.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Do you have sealant for grey or black windows?
Yes. Anthracite grey, black, brown and white cover most frames, with clear as an option.
How we handle window mastic in Penilee
From a single sill to a whole house of windows, you will get a clear quote before any work starts. To get one, drop us a line at info@mrmastic.co.uk with the number of frames and any access details. We work on patio & French doors, window sills and timber windows & doors, and the jobs we see most are white mastic on grey or black frames and gaps left after new windows were fitted.
Older stone-built tenements in Scotland’s cities were built with sash and case windows, though many have since been replaced. Whether you’re in a tenement flat or a house in Penilee, the joint between frame and wall is what keeps the weather out.
Every job is covered by a 12-month guarantee, wherever you are in Glasgow.
- Where
- Penilee (G52, PA1)
- Wider area
- Glasgow
- Cover
- A year, on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Avoid harsh chemicals near the mastic
- Keep paint off silicone joints
- Keep paint and stain on wooden frames in good order
- Keep jet washers away from the mastic
Most silicone sealants will not take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
Different surfaces, different methods
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Patio & French doors
Heavy door frames can move more than windows. A flexible sealant copes with that, where a rigid one would crack.
What we’re called out for in Penilee
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
These are the problems we’re asked about most:
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
Schools such as Rosshall Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- The length of the guarantee
- Are they insured?
When something else is needed
To be straight with you, some problems need a different trade:
- Damp coming through the wall itself rather than the frame joint
- Worn gaskets, brush seals or a door that has dropped
- A failed sealed unit that has misted up
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly before you book.
Surfaces we seal
- Patio & French doors
- uPVC windows
- Window sills
- Timber windows & doors
- Composite doors
- Aluminium frames
Leave it or put it right?
A quick bead over the top of old mastic looks like an easy fix, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. In a Scottish city tenement, failed sealant affects more than one flat: water can reach the flat below, and gaps in shared walls or fire-stopping affect the whole stair.
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- We never seal over old sealant
- White, clear, grey or coloured to suit, where the product allows
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
Read our cost guide or customer reviews.
Landlord and commercial work in Penilee
Landlords and agents in Penilee can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
We also work for property managers and facilities teams in Penilee and across Glasgow. Several sites can go on one quote, and we’re fully insured.
What happens on the day
We keep the work tidy and contained to the joints we are treating, so you can carry on as normal. Expect the work to take anything from an hour or two to a full day, depending on how many frames there are, and we explain the cure time before we leave. For a tenement in Penilee, work inside your flat is between us and you, while shared parts may need the factor or neighbours to agree. Tell us which applies when you book.
- 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.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention any sign-in or site rules at work premises
- Clear the area around the work
Getting a quote
For window mastic in Penilee, 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.
Read more
Also near Penilee
More services for Penilee
Penilee homes and the weather
Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic. Penilee is in the west of Scotland, which is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain.
Historic houses such as Pollok House, about 2.6 miles south-east, show how far back building around Penilee goes, and older homes nearby need a sealant that suits their walls. For landlords with property near Hillington West station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Penilee is about 1 mile south-east of Renfrew, in Glasgow. If you need window mastic in Penilee, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We are based in Crawley and cover Glasgow. Across Glasgow, we cover 183 places, and Penilee is one of them.
Jobs for window mastic in G52 and PA1 is quoted and booked the same way as anywhere else. Local streets include Watt Road, Rylees Road and School Road, all of which we cover. If you’re just outside Penilee, we cover Hillington (1 mile east), Crookston (1 mile south), Cardonald (1 mile east), Rosshall (1 mile south) and Shieldhall (1 mile north). Further out, we also cover Glasgow (4 miles east), Hillhead (4 miles north-east), Dowanhill (3 miles north-east), Woodlands (4 miles east), Woodside (4 miles north-east) and North Kelvinside (4 miles north-east).
Near you in Penilee
In Penilee, that means homes and buildings near Barshaw Park, among other places. Penilee has its own railway station: Hillington West station. A little further out are Paisley Thread Mill Museum (1.7 miles west) and Leverndale Hospital (1.3 miles south).