West Berkshire · England
Three Mile Cross Window Mastic
Window mastic in Three Mile Cross from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cold air getting in at the frame edge
- Rain getting in at the frame or under the sill
- Gaps left after new windows were fitted
Window mastic in Three Mile Cross
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We are often asked to deal with rushed sealant from a window installation and whistling draughts around closed windows, across aluminium frames, patio & French doors and uPVC windows.
Homes in small places like Three Mile Cross often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Each job carries a 12-month guarantee.
- Place
- Three Mile Cross (RG7)
- Wider area
- West Berkshire
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Three Mile Cross
With historic houses such as Stratfield Saye House (about 4 miles south) nearby, there’s older building stock in the area around Three Mile Cross 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.
Rented homes near Reading Green Park 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.
Three Mile Cross is about 3 miles south of Reading, in West Berkshire. We carry out window mastic for homes and businesses in Three Mile Cross and nearby, as part of our work across West Berkshire. We cover 155 towns and villages across West Berkshire.
Here we cover the RG7 postcode area for window mastic. You will find streets such as Dairy Grove, Basingstoke Road and Buttermilk Grove, and we cover them all. We also cover the places around Three Mile Cross: Ryeish Green (1 mile south-east), Great Lea Common (1 mile north-west), Whitley Wood (1 mile north-east), Shinfield (1 mile east) and Green Park (2 miles north-west). Further out, we also cover Newbury (15 miles west), Thatcham (12 miles west), Burghfield Common (4 miles west), Speenhamland (15 miles west), Calcot (4 miles north-west) and Shaw (15 miles west).
What’s near Three Mile Cross
Typical jobs here are in homes near The Farriers Arms, Pearman's Copse and Ryeish Green School, among other places. The nearest railway station is Reading Green Park station, about 2 miles north-west. Well-known places in the area include Beaumys Castle (2.1 miles south) and The Oracle (3.3 miles north). The countryside around Three Mile Cross includes Longwater and Fobney Island Wetland Reserve.
For landlords and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
Housing providers, facilities teams and property managers book us too in Three Mile Cross and across West Berkshire. We can quote a run of properties together.
Also near Three Mile Cross
More services for Three Mile Cross
Questions from Three Mile Cross
I let a flat near Reading Green Park station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Three Mile Cross in your area for window mastic?
Yes, Three Mile Cross is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear quote.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access.
Do you have insurance?
Yes, we’re fully insured.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Is the new sealant paintable?
Silicone generally won’t take paint. Let us know beforehand, and we will use a paintable product where it suits.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Access and height
- How many areas need sealing
- The type of sealant required
- Any mould that needs treating
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Where the job is, and your postcode
- The rough size of the job
- Photos by email, if that is easy
- The type of property
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
DIY sealant or a professional job?
If you’re 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.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why act early in Three Mile Cross
The work is quick compared with the damage it prevents: the visit takes most of a day for a typical house, less for a few frames. Leave it until water is coming in and you may need plastering and decorating as well. Where a wall is exposed, as many are in small places like Three Mile Cross, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
Why Three Mile Cross customers choose us
- White, clear, grey or another colour, product permitting
- A 12-month guarantee on all work
- Any old sealant cut out fully, not covered over
- Anti-fungal sanitary silicone in wet areas
What the job involves on each surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Composite doors
A composite door usually sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere as small as Three Mile Cross, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Before we arrive
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
Ask for a quote
For window mastic in Three Mile Cross, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
When to call us in Three Mile Cross
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
The problems people usually mention when they call are:
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
- Gaps between the frame and the inside reveal
- Mastic that has split away from the wall
If you live in an older home near St Michael and All Angels, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- What happens if they find a problem under the old sealant
- What product goes in the joint
- Is VAT in the price?
- Who turns up on the day