Reading · England
Window Mastic in Caversham Heights
Problem with your window and door frames in Caversham Heights? We cut out the old, prepare the joints and apply the right sealant.
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
- Untidy mastic left by window fitters
Window mastic in Caversham Heights, done properly
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. If the draught is through the window seals instead, we’ll tell you. We work on uPVC windows, window sills and aluminium frames, and the jobs we see most are cracked internal joints between frame and plaster and old mastic that has gone black or come away.
Homes around Caversham Heights range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
Your job is guaranteed for a year, as with all our work.
- Location
- Caversham Heights (RG4)
- Wider area
- Reading
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about window mastic in Caversham Heights
Is Caversham Heights in your area for window mastic?
Yes. Our work covers London and the South East, and Caversham Heights is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Will you come out to Caversham Heights?
Yes, Caversham Heights is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Where do you work from?
Our base is Crawley. We work across South East England, London and Scotland.
How much does window mastic cost in Caversham Heights?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
Aftercare tips
To keep the joints looking good and working properly:
- Wash the frames with mild soapy water
- Check the mastic once a year
- Do not paint over the silicone
- Avoid blasting the frames with a pressure washer
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just ring 0345 464 0079 or drop us an email.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
When to call us in Caversham Heights
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
It’s worth asking for a quote if you see:
- Draughty joints inside around the window
- Cold air getting in at the frame edge
- White mastic on grey or black frames
- Gaps left after new windows were fitted
If you live in an older home near St. Andrew's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- Which sealant they’ll use, and why
- The length of the guarantee
- How much experience the applicator has
- Whether VAT is included
The process
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of frames, longer for a whole house. Parking around Caversham Heights is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- 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.
- 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
- Keep pets and children clear of the area while we work
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
How to get a quote
Asking for a quote is easy: let us know what needs doing and where and its rough size. Photos by email help us understand the job.
Related advice
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Towns and villages near Caversham Heights
Other services in Caversham Heights
When it isn’t the sealant
Before booking, it’s worth knowing the limits:
- A door that needs adjusting, rehanging or new seals
- Rotten timber, which needs a joiner first
- Condensation trapped between the panes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Caversham Heights
- Window sills
- Aluminium frames
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Composite doors
How we quote for window mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- Working hours on commercial sites
- Access and height
- The amount of work
- Whether old sealant or filler has to be cut out
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. You will have a clear quote before any work starts, so you know where you stand.
Helping us quote
To make quoting easier, let us know:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Where the job is, and your postcode
- The type of property
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and give you a clear quote.
Work for landlords, hotels and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Caversham Heights, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Windows and doors in Caversham Heights
Historic houses like Mapledurham House (about 2.1 miles west) are a reminder that the area around Caversham Heights has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. London and the South East are among 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 Caversham Primary School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Reading station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Caversham Heights is about 1 mile west of Caversham, in Reading. Our applicators cover window mastic for homeowners, landlords and businesses in Caversham Heights and the surrounding area, as part of our work across Reading. Our Reading coverage runs to 34 places, Caversham Heights among them.
Every address in RG4 is covered for window mastic. You’ll find streets such as River Road, Chazey Road and Albert Road, and we cover them all. We also cover the places around Caversham Heights: Caversham (1 mile east), Tokers Green (1 mile north), Emmer Green (1 mile north-east), Lower Caversham (1 mile south-east) and Chalkhouse Green (1 mile north). Further out, we also cover Shinfield (5 miles south), Arborfield Garrison (8 miles south-east), Horncastle (3 miles south-west), Whitley Wood (4 miles south), Sonning Common (3 miles north) and Fords Farm (3 miles south-west). Caversham Heights is one of the larger places we cover in Reading.
Near you in Caversham Heights
Typical jobs here are in homes near Hemdean House School, Round Copse and Highdown School and Sixth Form Centre and the streets around them. Caversham Heights’s nearest station is Reading station, roughly 1.4 miles south-east. Well-known places in the area include Battle Hospital (1.3 miles south) and Royal Berkshire Regiment Museum (1.4 miles south-west). Open spaces near Caversham Heights include Fobney Island Wetland Reserve and Sonning Hill.