Wokingham · England
Window Mastic in Charvil
Mastic around window and door frames, sills and patio doors in Charvil, with a 12-month guarantee on every job. Ask us for a quote.
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Whistling draughts around closed windows
Window mastic in Charvil, done properly
Homes in Charvil have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on uPVC windows, composite doors and patio & French doors, and common reasons people get in touch are gaps where the sill meets the wall and whistling draughts around closed windows.
Around Charvil, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
Big or small, you get the same 12-month guarantee in Charvil and across Wokingham.
- Where
- Charvil (RG10)
- Region
- Wokingham
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Do you need window mastic in Charvil?
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Look out for these signs:
- Black, perished sealant on frames
- Cracked or shrunken mastic around the frame
- Leaking joints at the ends of sills
- Cold air getting in at the frame edge
Letting a property close to Twyford station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
What to look for in a quote
- Whether VAT is included
- Whether they seal over old material or remove it
- Whether you can choose the colour
- The length of the guarantee
Why it’s worth doing now in Charvil
The work is quick compared with the damage it prevents: it takes a few hours for a few frames, or a day or more for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Homes in smaller places like Charvil can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, call 0345 464 0079 or email us and we will give you an honest view and a quote.
Why choose Mr Mastic in Charvil
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes most of a day for a typical house, less for a few frames. In a smaller place like Charvil, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- 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.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Clear items away from the joints we are working on
- Keep pets and children clear of the area while we work
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Read more
Questions from Charvil
Is Charvil within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you cover Charvil for window mastic?
Yes, Charvil is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. You’ll know the timing when we quote.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
Can you do upstairs windows?
Generally, yes. We plan safe access before the job, so mention the height and anything in the way.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Walk round the house once a year and look at the joints
- Do not aim a pressure washer at the joints
- Make sure the drainage slots are not blocked
- Wash the frames with mild soapy water
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Leaks generally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Broken hinges, locks or handles
- Penetrating damp from a failed cavity tray or render
- A failed sealed unit that has misted up
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Patio & French doors
- Window sills
- Aluminium frames
- uPVC windows
- Composite doors
- Timber windows & doors
More services for Charvil
Windows and doors in Charvil
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.
For site and facilities teams at buildings such as Waingels College, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to St Patrick's Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Charvil is about 2 miles north of Woodley, in Wokingham. We carry out window mastic for householders, landlords and businesses in Charvil, as part of our work across Wokingham. Our Wokingham coverage runs to 35 places, Charvil among them.
Work in RG10 works the same way as everywhere else we cover. Whether your property is on Old Bath Road, Wenlock Edge and Pipistrelle Way or a nearby road, we can help. Other places close to Charvil include Twyford (1 mile east), Ruscombe (1 mile east), Whistley Green (1 mile south-east), Woodley (2 miles south) and Shiplake (2 miles north). Further out, we also cover Reading (4 miles south-west), Wokingham (5 miles south), Earley (4 miles south-west), Crowthorne (8 miles south-east), Lower Earley (4 miles south-west) and Winnersh (3 miles south).
What’s near Charvil
Typical jobs here are in homes near The Piggott School, Polehampton Church of England Infant School and The Wagon And Horses Public House. Charvil’s nearest station is Twyford station, roughly 0.9 miles east. A little further out are Royal Berkshire Hospital (3.7 miles south-west) and Berkshire Medical Heritage Centre Museum (3.6 miles south-west). Green spaces nearby include Sonning Hill and South Lake.