Reading · England
Gallowstree Common Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Gallowstree Common. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracked sealant at the sill ends
- Mastic that’s falling out in pieces
- Untidy mastic left by window fitters
What affects the quote in Gallowstree Common
Jobs vary more than people expect. The main factors:
- Access and height
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
- Any working-time requirements on site
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- Whether it’s a home or a business
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details.
Window mastic in Gallowstree Common, done properly
Around Gallowstree Common we seal all kinds of frames: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on aluminium frames, composite doors and uPVC windows, and people most often call us about gaps where the sill meets the wall and a bead that doesn’t match the frame.
Homes in small places like Gallowstree Common 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.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Place
- Gallowstree Common (RG4)
- Region
- Reading
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we are called out for in Gallowstree Common
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. Backing rod sets the right depth.
The most common problems we see are:
- Damp patches on the reveal after heavy rain
- White mastic on grey or black frames
- Mastic that is falling out in pieces
- Cold air getting in at the frame edge
Letting a property close to Tilehurst station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before booking anyone
- Is the old sealant removed completely?
- How much experience the applicator has
- When the joint can take water or movement
- Which colour the sealant will be
Gallowstree Common homes and the weather
Historic houses like Mapledurham House (about 2.6 miles south-west) are a reminder that the area around Gallowstree Common 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St John the Baptist, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Gallowstree Common is about 3 miles north-west of Caversham, in Reading. Whether you are in the middle of Gallowstree Common or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Gallowstree Common is one of 34 places in Reading where we work.
Postcode districts we cover here for window mastic: RG4. Streets in the area include Reades Lane, Hearns Lane and Horsepond Road, all of which we cover. If you’re just outside Gallowstree Common, we cover Cane End (1 mile south-west), Hook End (2 miles north-west), Stoke Row (2 miles north), Checkendon (3 miles north-west) and Woodcote (3 miles west). We also work in nearby towns such as Caversham (3 miles south-east), Norcot (4 miles south), West Reading (4 miles south), Tilehurst Within (4 miles south), Shinfield (8 miles south) and Arborfield Garrison (10 miles south-east).
What’s near Gallowstree Common
Locally, jobs take us to homes and businesses close to The Reformation pub, Kidmore End Church of England Primary School and The Warwick School, among other places. For rail, the closest station is Tilehurst station, roughly 3.3 miles south of the centre. Nearby you will also find Battle Hospital (4.1 miles south). Green spaces nearby include Hartslock.
Different surfaces, different methods
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take most of a day for a typical house, less for a few frames. In a small place like Gallowstree Common, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
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Other services in Gallowstree Common
Why deal with it now?
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Where a wall is exposed, as many are in small places like Gallowstree Common, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why choose Mr Mastic in Gallowstree Common
- Over 20 years’ experience
- We agree the colour with you first
- An ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
See our cost guide or our reviews.
Questions from Gallowstree Common
Do you cover Gallowstree Common for window mastic?
Yes, Gallowstree Common is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear price.
Can you help a landlord with a rental near Tilehurst station?
Yes. We work for landlords and letting agents as well as householders. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can you do upstairs windows?
Usually, yes. We plan safe access before the job.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
Can you get sealant to suit coloured frames?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. We will tell you how long your job needs when we quote.
Looking after it afterwards
Aftercare is simple:
- Keep timber frames painted
- Make sure the drainage slots are not blocked
- Do not aim a pressure washer at the joints
- Keep solvents and bleach off the sealant
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
What sealant work cannot fix
To be straight with you, there are a few things sealant will not fix:
- Condensation trapped between the panes
- Faulty window hardware
- Damp coming through the wall itself rather than the frame joint
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Joints and surfaces we work on
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows