West Berkshire · England
Window & door mastic in Upper Green, West Berkshire
Window mastic across Upper Green and nearby, with old sealant always removed completely.
- A bead that doesn’t match the frame
- Cold air getting in at the frame edge
- Draughty joints inside around the window
How we handle window mastic in Upper Green
The new joint does not have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. We work on uPVC windows, window sills and aluminium frames, and people most often call us about gaps left after new windows were fitted and rain getting in at the frame or under the sill.
Homes in small places like Upper Green often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
All our work is covered by our 12-month guarantee.
- Where
- Upper Green (RG17)
- Wider area
- West Berkshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Composite doors
- Aluminium frames
- uPVC windows
- Window sills
- Patio & French doors
- Timber windows & doors
What happens if it’s left?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In a small place like Upper Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Arbo and Everbuild products
- Colour agreed with you before we start
- Sealant colour chosen to suit
- Full insurance on every job
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere like Upper Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Before we arrive
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
If you are in Upper Green and need window mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Advice
What affects the quote in Upper Green
For a quick quote, just ask. The main things that affect it are:
- The number and length of the joints
- Working hours on commercial sites
- The old material and how stubborn it is
- The product the joint needs
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Helping us quote
To help us quote quickly, please include:
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Common questions in Upper Green
Can you help a landlord with a rental near Kintbury station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Do you cover smaller places like Upper Green?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Will resealing my frames help with draughts?
It will if the frame joint is the problem. We check where the draught is before any work starts.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we are using and why.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
Surface by surface
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so they get particular care.
Landlords, agents and businesses in Upper Green
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
For anyone letting property in or around Upper Green, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Nearby places to Upper Green
Also in Upper Green
How to look after the new joints
So the new joints stay in good condition:
- Walk round the house once a year and look at the joints
- Clear any debris from frame drain holes
- Repaint timber before it’s bare
- Don’t use solvent cleaners on the joint
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
Frames and glazing around Upper Green
With historic houses such as Stargroves (about 2.9 miles south-east) nearby, there’s older building stock in the area around Upper Green as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of St Michael, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Kintbury station, renewing tired window mastic between tenants heads off draught and damp complaints. For site and facilities teams at buildings such as Inkpen Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Upper Green is about 7 miles west of Newbury, in West Berkshire. Homes, rented property, offices and hotels in Upper Green is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Upper Green is one of 155 places in West Berkshire we cover for window mastic. You can also see our page for Reading, about 22 miles away.
Here we cover the RG17 postcode area for window mastic. Other places close to Upper Green include Inkpen (1 mile north), Inkpen Common (1 mile north-east), Hell Corner (1 mile north-east), Lower Green (1 mile north-west) and Kintbury (2 miles north-east). We also work in nearby towns such as Newbury (7 miles east), Thatcham (9 miles east), Speenhamland (7 miles north-east), Hungerford (4 miles north-west), Lambourn (10 miles north) and Shaw (7 miles north-east).
Landmarks near Upper Green
Locally, jobs take us to homes and businesses close to Crown and Garter pub and the streets around them. For rail, the closest station is Kintbury station, roughly 2.6 miles north-east. A little further out are Hamstead Marshall 3 (3.8 miles north-east). Not far away are Kintbury Newt Ponds and Inkpen Hill.