Reading · England
Sonning Common Window Mastic
Window mastic in Sonning Common from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Draughty joints inside around the window
- Cold air getting in at the frame edge
- White mastic on grey or black frames
Different surfaces, different methods
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. If we find rot, we’ll tell you before going ahead, as a joiner will need to deal with it.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Window mastic for homes and businesses in Sonning Common
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through. Where the air is getting in through the window itself, we will say so. Typical jobs include water coming in at the bottom corners of a door and rushed sealant from a window installation, on patio & French doors, window sills and composite doors.
In smaller places like Sonning Common, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or email us.
- Location
- Sonning Common (RG4, RG9)
- Region
- Reading
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about window mastic in Sonning Common
Can you help a landlord with a rental near Henley-On-Thames station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Do you cover smaller places like Sonning Common?
Yes. Sonning Common is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Does the work come with a guarantee?
Yes. All our work carries a 12-month guarantee, and we are ARBOMaster approved applicators.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we will plan for it.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
How long will my window job take?
Allow a morning for a couple of windows and a door. Access and the amount of old mastic make the biggest difference.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we will agree access with you when we book.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What we’re called out for in Sonning Common
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Keep an eye out for any of the following:
- Rain getting in at the frame or under the sill
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
If you let a flat or house near Henley-On-Thames station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What your quote should include
- What the cure time is
- Whether VAT is included
- What happens if the job turns out different
- Whether all the old sealant comes out first
How the visit works
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. The job usually takes a few hours for a few frames, or a day or more for a whole house, and we explain the cure time before we leave. A visit to Sonning Common is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
How to prepare
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
Related advice
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
If you manage several properties in or around Sonning Common, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
When it isn’t the sealant
It helps to know what we cannot do:
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
- Broken hinges, locks or handles
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Composite doors
- Patio & French doors
Window mastic in Sonning Common: local notes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Greys Court (about 2.2 miles north-east) are a reminder that the area around Sonning Common has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Sonning Common Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near The Church of Christ the King, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Sonning Common is about 3 miles north of Caversham, in Reading. For window mastic in and around Sonning Common, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Reading from our Crawley base, Sonning Common included. Our Reading coverage runs to 34 places, and Sonning Common is one of them.
Jobs for window mastic in RG4 and RG9 is quoted and booked the same way as anywhere else. Window mastic is available to properties on Wood Lane, Green Lane and Woodbury Close. We also cover the places around Sonning Common: Peppard Hill (1 mile north-west), Rotherfield Peppard (1 mile north), Kidmore End (1 mile south-west), Kingwood Common (1 mile north-west) and Shepherd's Green (2 miles north). Further out, we also cover Caversham (3 miles south), Norcot (4 miles south-west), West Reading (4 miles south), Tilehurst Within (5 miles south-west), Shinfield (8 miles south) and Arborfield Garrison (10 miles south). As one of the bigger places in Reading, Sonning Common has every kind of property, from flats to offices.
Landmarks near Sonning Common
We work in homes and buildings around Maiden Erlegh Chiltern Edge, The Warwick School and Hare & Hounds pub, among other places. Sonning Common’s nearest station is Henley-On-Thames station, roughly 3.7 miles east. Nearby you will also find Frazer Nash Archives (3.8 miles east) and Battle Hospital (4.1 miles south). Not far away are Sonning Hill and Warburg Nature Reserve.
Looking after it afterwards
Looking after new joints is easy:
- Keep paint and stain on wooden frames in good order
- Avoid harsh chemicals near the mastic
- Avoid blasting the frames with a pressure washer
- Don’t paint over the silicone
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.