Aberdeen · Scotland
Portlethen Window Mastic
Professional window mastic in and around Portlethen, with old sealant always removed completely and a one-year guarantee.
- Old mastic that has gone black or come away
- A bead that does not match the frame
- Damp patches on the reveal after heavy rain
About our window mastic in Portlethen
Around Portlethen we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on composite doors, window sills and timber windows & doors, and the jobs we see most are cracked internal joints between frame and plaster and mastic that’s falling out in pieces.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
All our work comes with our 12-month guarantee.
- Location
- Portlethen (AB12)
- Wider area
- Aberdeen
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Can I do it myself?
If you are set on DIY, put the effort into 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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The process
On the day, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before we start. The work usually takes a morning for a couple of windows and a door. Somewhere like Portlethen may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
Related advice
Why it’s worth doing now in Portlethen
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a place like Portlethen, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Leaving a failed joint normally makes the job bigger, not smaller. If you’re unsure, drop us a line at info@mrmastic.co.uk and we will give you an honest view and a quote.
Why book with us
- 4.9 on Google from 180+ five-star reviews
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
- Any old sealant cut out fully, not covered over
Read our cost guide or what customers say.
Nearby places to Portlethen
Also in Portlethen
Common questions in Portlethen
Can you help a landlord with a rental near Portlethen station?
Yes, landlords and agents are among the people we work for. Just send an email to info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Does the coastal weather in Portlethen 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.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
How much does window mastic cost in Portlethen?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Portlethen homes and the weather
Portlethen is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Friendville (about 4.8 miles north) nearby, there’s older building stock in the area around Portlethen as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you live in an older home near Portlethen Parish Church, the joint between an old wall and a newer frame is generally the first place rain gets in. Letting a property close to Portlethen station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Portlethen is about 6 miles south of Aberdeen, in Aberdeen. Every kind of property in Portlethen can book us for window mastic, old or new, large or small. The work is guaranteed for a year. 63 places in Aberdeen are on our list, from the larger towns to small villages. You can also see our page for Aberdeen, roughly 6 miles from Portlethen.
Postcode districts we cover here for window mastic: AB12. That includes homes and businesses on Mosside Drive, Muirend Road and Dunvegan Place. Being close to the A92, Portlethen is simple for us to get to. Other places close to Portlethen include Badentoy Park (1 mile north-west), Portlethen Village (1 mile south-east), Findon (1 mile east), Cammachmore (2 miles south-west) and Marywell (2 miles north-east). We also work in nearby towns such as Aberdeen (6 miles north), Rosemount (6 miles north), Berryden (7 miles north), Ferryhill (5 miles north), New Aberdeen (6 miles north) and Dyce (10 miles north). Portlethen is one of the larger places we cover in Aberdeen.
Near you in Portlethen
Typical jobs here are in homes near Portlethen Academy and the streets around them. There’s a railway station in Portlethen itself: Portlethen station. Well-known places in the area include Blairs College (3.3 miles north-west) and Pitfoddels Castle (3.8 miles north). Open spaces near Portlethen include Portlethen Moss and Loirston Loch.
When to call us in Portlethen
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
The problems people generally mention when they call include:
- A bead that does not match the frame
- Draughts coming in around windows and doors
- Water coming in at the bottom corners of a door
- Gaps where the sill meets the wall
Schools such as Portlethen Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- Which colour the sealant will be
- Whether they’re fully insured
- The length of the guarantee
- How the joint is cleaned and prepared
Different surfaces, different methods
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain can’t run into the wall.
Quotes for window mastic in Portlethen
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- Mould in or behind the old joints
- The number of rooms or windows
- The product the joint needs
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
When you call or email, these details help:
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
- What’s wrong with the joints now
- The address or postcode of the job
Every job is quoted individually. Simply send an email to info@mrmastic.co.uk and describe the job.
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Paint up to the joint, not over it
- Keep timber frames painted
- Keep jet washers away from the mastic
- Wipe condensation off the frames
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.