Kent · England
Upstreet Window Mastic
Professional window mastic in and around Upstreet, with old sealant always removed completely and a one-year guarantee.
- Old mastic that has gone black or come away
- Damp patches on the reveal after heavy rain
- Gaps left after new windows were fitted
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Where a wall is exposed, as many are in small places like Upstreet, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What you get with us
- 12-month guarantee on every job
- White, clear, grey or another colour, product permitting
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
Window mastic in Upstreet
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. Where the air is getting in through the window itself, we’ll say so. If you’re dealing with hard, cracked sealant around windows and black, perished sealant on frames, we can put it right.
Somewhere as small as Upstreet, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Upstreet (CT3)
- Region
- Kent
- Cover
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Upstreet
Other services in Upstreet
Different surfaces, different methods
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Do not aim a pressure washer at the joints
- Keep timber frames painted
- Walk round the house once a year and look at the joints
- Don’t paint over the silicone
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Common questions in Upstreet
Will you come out to Upstreet?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Upstreet for window mastic?
Yes. Our work covers London and the South East, and Upstreet is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
What does window mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Will you leave a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we are done.
Does the work come with a guarantee?
Yes. Our one-year guarantee covers every job, inside or out.
Can landlords and businesses book you?
Yes, often. We can quote for several properties at once.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Signs you need window mastic in Upstreet
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
It’s worth asking for a quote if you see:
- Cracked sealant at the sill ends
- Rushed sealant from a window installation
- Mastic that is falling out in pieces
- Cracked or shrunken mastic around the frame
Managing a site like Chislet Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- What the quote includes, VAT included or not
- What insurance they hold
- Whether they seal over old material or remove it
- How hidden problems are handled
The process
Once we’re on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes most of a day for a typical house, less for a few frames. Somewhere as small as Upstreet, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
Advice
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- Draughts through the window seals rather than the frame
- Soft or decayed wood in the frame
- A failed sealed unit that has misted up
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Upstreet
- Aluminium frames
- uPVC windows
- Window sills
- Composite doors
- Patio & French doors
- Timber windows & doors
Windows and doors in Upstreet
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Sturry station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. In the older streets around Church of St Mary the Virgin, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Upstreet is about 4 miles south-east of Herne Bay, in Kent. From the centre of Upstreet to the outskirts, we cover window mastic for every kind of property. 922 places in Kent are on our list, large and small. Chelmsford is on our list too, around 42 miles away.
Jobs for window mastic in CT3 is quoted and booked the same way as anywhere else. We cover properties on St Mary's Gardens, Becketts Wood and Grove Ferry Hill. Close by, we work in Grove (1 mile south), West Stourmouth (2 miles east), Sarre (2 miles north-east), Preston (2 miles south-east) and East Stourmouth (2 miles east). We also work in nearby towns such as Canterbury (6 miles south-west), Margate (9 miles north-east), Dover (14 miles south), Ramsgate (9 miles east), Broadstairs (10 miles east) and Whitstable (8 miles west).
What’s near Upstreet
Around Upstreet, our work takes us to homes and buildings near Grove Ferry Picnic Area, Spires Academy and The Grove Ferry Inn, among other places. Upstreet’s nearest station is Sturry station, roughly 3.8 miles south-west. Nearby you’ll also find St Martins Hospital (5.2 miles south-west). The countryside around Upstreet includes West Blean and Thornden Woods.
What affects the quote in Upstreet
There’s no set price list, because no two jobs are the same. What we look at:
- Any mould that needs treating
- The number and length of the joints
- The type of sealant required
- The old material and how stubborn it is
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before we start.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Photos by email, if that’s easy
- Where the job is, and your postcode
- What’s wrong with the joints now
- Any previous sealing or DIY work
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.