Reading · England
Window & door mastic in Trench Green, Reading
Our applicators work in Trench Green on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Gaps where the sill meets the wall
- Mastic that has split away from the wall
- Water coming in at the bottom corners of a door
How we handle window mastic in Trench Green
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We work on uPVC windows, composite doors and patio & French doors, and people most often call us about damp patches on the reveal after heavy rain and white mastic on grey or black frames.
Mastic can only go onto a dry, clean joint, so window work in Trench Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Trench Green (RG4)
- Region
- Reading
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for window mastic in Trench Green
There’s no set price list. The quote depends on:
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- Whether the work is at height
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Any previous sealing or DIY work
- The address or postcode of the job
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, call 0345 464 0079 or email us.
Also near Trench Green
More services for Trench Green
What we’re called out for in Trench Green
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.
Look out for these signs:
- Gaps left after new windows were fitted
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
- Water coming in at the bottom corners of a door
If you let a flat or house near Tilehurst station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Comparing quotes
- How much experience the applicator has
- How long to leave it before use
- Whether they’re fully insured
- Whether VAT is included
Trench Green: your questions answered
Is Trench Green in your area for window mastic?
Yes, Trench Green is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Tilehurst station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Can resealing stop a draught around my window?
It will if the frame joint is the problem. We check where the draught is before we start.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you have insurance?
Yes. Mr Mastic is fully insured.
Is the new sealant paintable?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Tell us if you’re decorating and we will choose accordingly.
Does the work come with a guarantee?
Yes. Every job comes with our 12-month guarantee, and we are fully insured.
When something else is needed
To be straight with you, some problems need a different trade:
- Faulty window hardware
- Penetrating damp from a failed cavity tray or render
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Timber windows & doors
- uPVC windows
- Patio & French doors
- Window sills
- Aluminium frames
- Composite doors
Keeping the joints in good condition
So the new joints stay in good condition:
- Make sure the drainage slots are not blocked
- Keep timber frames painted
- Ventilate rooms so frames don’t stay wet inside
- Do not aim a pressure washer at the joints
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Window mastic in Trench Green: local notes
Historic houses like Mapledurham House (about 1.1 miles south-west) are a reminder that the area around Trench Green 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.
If you live in an older home near Church of St Margaret and Bardolf Aisle, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Trench Green is about 2 miles north-west of Caversham, in Reading. Anywhere in RG4, we can carry out window mastic at your property. Trench Green is one of 34 places in Reading where we work.
All of RG4 is covered for window mastic. Close by, we work in Chazey Heath (1 mile east), Mapledurham (1 mile south-west), Purley on Thames (2 miles south-west), Norcot (2 miles south) and Tilehurst (2 miles south). Further out, we also cover West Reading (3 miles south), Shinfield (7 miles south-east), Arborfield Garrison (9 miles south-east), Horncastle (3 miles south), Whitley Wood (6 miles south-east) and Fords Farm (4 miles south).
Local landmarks in Trench Green
Around Trench Green, our work takes us to homes and buildings near Pack Horse Public House. For rail, the closest station is Tilehurst station, roughly 1.7 miles south of the centre. Nearby you will also find Royal Berkshire Regiment Museum (2.6 miles south) and Battle Hospital (2.6 miles south). Open spaces near Trench Green include Moor Copse Nature Reserve and Sonning Hill.
Why act early in Trench Green
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. Where a wall is exposed, as many are in small places like Trench Green, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why Trench Green clients choose us
- Any old sealant cut out fully, not covered over
- A choice of colours where the product allows
- Rated 4.9 stars on Google
- Domestic, commercial and hotel work
Take a look at our cost guide or what customers say.
The process
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a morning for a couple of windows and a door, depending on the amount of work. In a small place like Trench Green, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
- Let us know about stairs, lifts or work at height
Get a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.