Oxfordshire · England
Window Mastic in Middle Assendon
Mastic around window and door frames, sills and patio doors for Middle Assendon, backed by a 12-month guarantee. Ask us for a quote.
- Hard, cracked sealant around windows
- Draughts coming in around windows and doors
- Damp patches on the reveal after heavy rain
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Window mastic in Middle Assendon
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. We are often asked to deal with a bead that doesn’t match the frame and cold air getting in at the frame edge, across window sills, composite doors and timber windows & doors.
In a village or hamlet like Middle Assendon, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- Middle Assendon (RG9)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Questions from Middle Assendon
Do you cover smaller places like Middle Assendon?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Henley-On-Thames station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or send us an email.
How do I get a quote for window mastic in Middle Assendon?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us and tell us what needs doing and where.
How to look after the new joints
Looking after new joints is easy:
- Look round the frames every year or so
- Do not paint over the silicone
- Make sure the drainage slots are not blocked
- Keep jet washers away from the mastic
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
What happens if it’s left?
Resealing frames is a short job: it 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 Middle Assendon, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Combining jobs into one visit usually makes better use of the time than several visits. We’ll send you a clear quote for the lot.
What you get with us
- 20+ years of sealant experience
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
- ARBOMaster approved applicator
See what affects the cost and customer reviews.
What window mastic looks like in Middle Assendon
With historic houses such as Greys Court (about 1.8 miles south-west) nearby, there’s older building stock in the area around Middle Assendon as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is 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.
Rented homes near Henley-On-Thames station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. If you live in an older home near Church of St James, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Middle Assendon is about 6 miles north of Caversham, in Oxfordshire. Whether you are in the middle of Middle Assendon or further out, we cover window mastic for every kind of property. Across Oxfordshire, we cover 443 places, and Middle Assendon is one of them. There’s also a page for Reading, about 8 miles away.
Jobs for window mastic in RG9 is quoted and booked the same way as anywhere else. Local streets include Fawley Bottom Lane and White Lane, all of which we cover. Nearby, we also carry out window mastic in Bix (1 mile south-west), Fawley Bottom (1 mile north-east), Lower Assendon (1 mile south-east), Fawley (1 mile east) and Catslip (2 miles west). Further out, we also cover Didcot (14 miles west), Thame (12 miles north), Henley-on-Thames (3 miles south-east), Benson (8 miles north-west), Chinnor (9 miles north) and Tilehurst (9 miles south-west).
Local landmarks in Middle Assendon
Locally, jobs take us to homes and businesses close to Fawley Court and Temple Island and Rainbow Inn. The nearest railway station is Henley-On-Thames station, roughly 2.7 miles south-east of the centre. Other landmarks nearby include Frazer Nash Archives (3.1 miles south-east). Not far away are Warburg Nature Reserve.
How the visit works
We keep the work tidy and contained to the area we are working on. The job generally takes anything from an hour or two to a full day, depending on how many frames there are, and we tell you how long to leave it before we go. In a small place like Middle Assendon, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
- Tell us about any previous sealing or DIY attempts
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or email us.
Related advice
How we quote for window mastic
The quote reflects the job in front of us. We look at:
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- Which sealant suits the joint
- How many rooms, windows or areas are involved
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- The address or postcode of the job
- The rough size of the job
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.