West Berkshire · England
Window Mastic in Plastow Green
Window and door frames in Plastow Green need attention? We cut out the old, prepare the joints and apply the right sealant.
- Cold air getting in at the frame edge
- Rain getting in at the frame or under the sill
- Mastic that’s falling out in pieces
Window mastic in Plastow Green
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. Typical jobs include cold air getting in at the frame edge and hard, cracked sealant around windows, on window sills, patio & French doors and timber windows & doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around Plastow Green is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Where
- Plastow Green (RG19)
- Wider area
- West Berkshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens on the day
You do not need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of frames, longer for a whole house in most cases. In a small place like Plastow Green, access is usually the main thing to plan. 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.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
Get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or drop us an email.
Related advice
Nearby places to Plastow Green
More services for Plastow Green
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Paint up to the joint, not over it
- Clear any debris from frame drain holes
- Check the mastic once a year
- Use gentle cleaners on frames and sealant
Silicone can’t normally be painted, so mention any painting plans before any work starts. There are paintable sealants for joints that need it.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Surface by surface
Composite doors
A composite door usually sits in a plastic outer frame, so its perimeter joint is sealed much like a window. The bead is colour-matched to the frame.
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
Do you need window mastic in Plastow Green?
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, and a gap filled solid can’t flex. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Damp patches on the reveal after heavy rain
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
- White mastic on grey or black frames
Letting a property close to Thatcham station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before you book anyone
- How the colour is chosen
- The length of the guarantee
- Whether the sealant suits the joint
- What insurance they hold
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Where a wall is exposed, as many are in small places like Plastow Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why Plastow Green clients choose us
- We never seal over old sealant
- 20+ years of sealant experience
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
Read our cost guide and customer reviews.
What window mastic looks like in Plastow Green
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.
Schools such as Cheam School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Plastow Green is about 4 miles south of Thatcham, in West Berkshire. Every kind of property in Plastow Green can book us for window mastic. The work is guaranteed for a year. Plastow Green is one of 155 places in West Berkshire where we work for window mastic. You can also see our page for Reading, roughly 13 miles from Plastow Green.
We cover every part of the RG19 postcode area for window mastic and the streets around it. Other places close to Plastow Green include Goose Hill (1 mile north-east), Mill Green (1 mile north), Headley (1 mile north-west), Fair Oak (1 mile east) and Ashford Hill (1 mile east). Within a short drive, we also cover Newbury (5 miles north-west), Thatcham (4 miles north), Burghfield Common (8 miles north-east), Speenhamland (5 miles north-west), Hungerford (13 miles west) and Spencers Wood (12 miles east).
Around Plastow Green
The nearest railway station is Thatcham station, roughly 2.9 miles north. Other landmarks nearby include West Berkshire Community Hospital (4.4 miles north-west) and Old Chapel Textile Centre (2.4 miles north-west). Not far away are Ladle Hill and Thatcham Reed Beds.
Common questions in Plastow Green
I let a flat near Thatcham station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Plastow Green in your area for window mastic?
Yes. We work across London and the South East, and Plastow Green is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
How long will my window job take?
Allow a few hours for a handful of frames, longer for a whole house. Access and how stubborn the old mastic is affect the time most.
Can I add another job to the visit?
Yes. Just list everything you need and we will quote it together.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or drop us an email.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
- Faulty window hardware
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before booking.
Where we work in Plastow Green
- Timber windows & doors
- Window sills
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows