West Berkshire · England
Window Mastic in Kintbury
Window mastic for Kintbury and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Mastic that has split away from the wall
- A bead that doesn’t match the frame
- Whistling draughts around closed windows
How we handle window mastic in Kintbury
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. If you have whistling draughts around closed windows and leaking joints at the ends of sills, we can put it right, whatever the surface.
Homes in small places like Kintbury 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.
A 12-month guarantee comes as standard.
- Location
- Kintbury (RG17)
- Region
- West Berkshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Kintbury, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Mention if the joints have been sealed before
Get a quote
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before any work starts.
Read more
When it isn’t the sealant
Before booking, it’s worth knowing the limits too:
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
- A failed sealed unit that has misted up
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Patio & French doors
- Timber windows & doors
- uPVC windows
- Composite doors
- Window sills
- Aluminium frames
Kintbury: your questions answered
I let a flat near Kintbury station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you do window mastic in Kintbury?
Yes, Kintbury is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
How long should I leave it?
It depends on the product and the temperature. We tell you how long to leave it before we go.
Does the work come with a guarantee?
Yes. Our one-year guarantee covers every job, inside or out.
Is the new sealant paintable?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before work begins.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What does window mastic cost?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us with a short description of the job.
Towns and villages near Kintbury
Other services in Kintbury
When to call us in Kintbury
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
The problems people normally mention when they call are:
- Cold air getting in at the frame edge
- Cracked sealant at the sill ends
- Mastic that has split away from the wall
- Old mastic that has gone black or come away
In the older streets around Church of St Mary, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before booking
- What happens if the job turns out different
- Which colour the sealant will be
- Whether all the old sealant comes out first
- How long the guarantee is
Windows and doors in Kintbury
With historic houses such as Benham Park (about 3.4 miles east) nearby, there’s older building stock in the area around Kintbury as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Kintbury St Mary's C.E. Primary School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Kintbury station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Kintbury is about 5 miles west of Newbury, in West Berkshire. From the centre of Kintbury to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Kintbury is one of 155 places in West Berkshire where we work. Our Reading page covers work nearby, about 21 miles away.
All of RG17 is covered for window mastic, from the main roads to the quietest streets. You will find streets such as Station Road, High Street and Morrish Grove, all of which we cover. Neighbouring places we cover for window mastic include Hell Corner (2 miles south), Inkpen (2 miles south-west), Inkpen Common (2 miles south), Lower Green (2 miles south-west) and Upper Green (2 miles south-west). Further out, we also cover Newbury (5 miles east), Thatcham (8 miles east), Speenhamland (5 miles east), Hungerford (3 miles west), Lambourn (8 miles north-west) and Shaw (6 miles east).
Local landmarks in Kintbury
Locally, jobs take us to homes and businesses close to Prince of Wales pub, among other places. There’s a railway station in Kintbury itself: Kintbury station. Other landmarks nearby include Hamstead Marshall 3 (2.2 miles east). For a walk, there’s Inkpen Hill and Kintbury Newt Ponds.
What happens if it’s left?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Where a wall is exposed, as many are in small places like Kintbury, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Why choose Mr Mastic in Kintbury
- Over 20 years’ experience
- Colour picked to suit the job
- Arbo and Everbuild products
- 12-month guarantee on every job
Aftercare tips
To keep the joints looking good and working properly:
- Wipe condensation off the frames
- Keep paint and stain on wooden frames in good order
- Use gentle cleaners on frames and sealant
- Clear any debris from frame drain holes
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.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
How we quote for window mastic
We quote each job individually. These are the things that affect it:
- The type of sealant required
- The size of the job
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What we need to know
Photos help, but a description is a good start. Please mention:
- Roughly how big the job is
- Pictures of the joints, sent by email
- Whether it has been sealed before
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.