West Berkshire · England
Window Mastic in Greenham
Window mastic across Greenham and nearby, with old sealant always removed completely.
- Untidy mastic left by window fitters
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
What the job involves on each surface
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. Those corners get the most care.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the sealant goes in between frame and wall.
How we handle window mastic in Greenham
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. We work on aluminium frames, patio & French doors and timber windows & doors, and the jobs we see most are mastic that’s falling out in pieces and hard, cracked sealant around windows.
Somewhere as small as Greenham, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
We stand behind the work with a 12-month guarantee, so you’re covered after we have gone.
- Place
- Greenham (RG19, RG14)
- Region
- West Berkshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work can’t fix
We won’t take on work that won’t last, so these are the limits:
- Rotten timber, which needs a joiner first
- Faulty window hardware
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
What we seal
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
- Aluminium frames
How it works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we have agreed what’s being done, we protect the area and start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Greenham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Mention if the joints have been sealed before
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
How to get a quote
To get a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Advice
Why it’s worth doing now in Greenham
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Around Greenham, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- Full insurance on every job
- Trusted Arbo and Everbuild sealants
- Any old sealant cut out fully, not covered over
- A sealant colour to suit the surroundings
See our cost guide and what customers say.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Wash the frames with mild soapy water
- Repaint timber before it’s bare
- Look round the frames every year or so
- Keep drainage slots and sill grooves clear
Most silicone sealants will not take paint, so mention any painting plans before any work starts. We can use a paintable sealant where that matters.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Greenham questions
Can you do window mastic in Greenham?
Yes. We work across London and the South East, and Greenham is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Greenham?
Yes. Greenham is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is the new sealant paintable?
Most silicone can’t be painted. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Do you have sealant for grey or black windows?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee, and we are fully insured.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
When to call us in Greenham
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
The problems people generally mention when they call include:
- A bead that doesn’t match the frame
- Damp patches on the reveal after heavy rain
- Draughty joints inside around the window
- Cold air getting in at the frame edge
If you look after a building such as The Willows Primary School, its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- Whether they’re fully insured
- How long to leave it before use
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it
What window mastic looks like in Greenham
With historic houses such as Shaw House (about 1.9 miles north) nearby, there’s older building stock in the area around Greenham as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Newbury Racecourse station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Greenham is about 1 mile south-east of Newbury, in West Berkshire. Greenham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across West Berkshire, we cover 155 places, and Greenham is one of them. For nearby work, see our Reading page, about 15 miles away.
Work in RG19 and RG14 works the same way as everywhere else we cover. Window mastic is available to properties on Water Lane, Greenham Road and Draytons View. We also cover Sandleford (1 mile south-west), Newbury (1 mile north-west), Newtown Common (2 miles south-west), Wash Common (2 miles south-west) and Burghclere Common (2 miles south). We also work in nearby towns such as Burghfield Common (11 miles east), Hungerford (9 miles west), Spencers Wood (15 miles east), Calcot (12 miles east), Lambourn (13 miles north-west) and Burghfield Hill (11 miles east).
Near you in Greenham
We work in homes and buildings around St Bartholomew's School, Sandleford Priory and The Old London Apprentice pub and the streets around them. The nearest railway station is Newbury Racecourse station, roughly 0.9 miles north of the centre. A little further out are West Berkshire Community Hospital (1.5 miles north-east) and Donnington Castle (2.7 miles north-west). Green spaces nearby include Audrey's Meadow.