Oxfordshire · England
Window Mastic in Postcombe
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Postcombe. Fully insured, ARBOMaster approved and guaranteed for a year.
- Sealant in the wrong colour for the frame
- Mastic that is falling out in pieces
- Rain getting in at the frame or under the sill
Quotes for window mastic in Postcombe
The price is agreed before any work begins. It takes into account:
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- How many areas need sealing
- Whether the work is at height
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- The type of property
- Pictures of the joints, sent by email
- Where the property is
- What’s wrong with the joints now
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved before giving you a price.
About our window mastic in Postcombe
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before any work starts. To get one, call 0345 464 0079 or drop us an email with the number of frames and any access details. We work on window sills, patio & French doors and aluminium frames, and the jobs we see most are cracked internal joints between frame and plaster and water coming in at the bottom corners of a door.
In a village or hamlet like Postcombe, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
You are covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Postcombe (OX9)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Postcombe
More services for Postcombe
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
What window mastic looks like in Postcombe
With historic houses such as Adwell House (about 0.8 miles west) nearby, there’s older building stock in the area around Postcombe 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. 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.
In the older streets around Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Postcombe is about 4 miles south of Thame, in Oxfordshire. Homes, rented property, offices and hotels in Postcombe is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. 443 places in Oxfordshire are on our list, from the larger towns to small villages. Our Oxford page covers work nearby, about 12 miles away.
We work across the OX9 postcode area for window mastic and the streets around it. You’ll find streets such as London Road, Salt Lane and Beech Farm Close. If you’re just outside Postcombe, we cover South Weston (1 mile south-west), Aston Rowant (1 mile east), Lewknor (1 mile south), Kingston Blount (2 miles east) and Crowell (2 miles east). We also work in nearby towns such as Oxford (12 miles west), Didcot (13 miles south-west), Abingdon-on-Thames (13 miles west), Thame (4 miles north), Henley-on-Thames (11 miles south) and Benson (7 miles south-west).
Landmarks near Postcombe
In Postcombe, that means homes and buildings near England's Rose pub. Other landmarks nearby include Thame Community Hospital (3.8 miles north). Open spaces near Postcombe include Aston Rowant NNR and Bald Hill.
How the job changes by surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We will tell you if that is what we find.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Faulty window hardware
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- Window sills
What we are called out for in Postcombe
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
If you can see any of these, it’s time to have the joints looked at:
- Gaps between the frame and the inside reveal
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
- Water coming in at the bottom corners of a door
In and around Postcombe, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- Whether they’re fully insured
- What happens if the job turns out different
- The length of the guarantee
- Whether you can choose the colour
What happens on the day
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a handful of frames, longer for a whole house. Somewhere as small as Postcombe, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, 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.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
Related advice
Work for landlords, hotels and businesses
For anyone letting property in or around Postcombe, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Housing providers, facilities teams and property managers book us too in Postcombe and across Oxfordshire. We can quote a run of properties together, and we’re fully insured for the work.
Common questions in Postcombe
Is Postcombe within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is window mastic in Postcombe guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Can I do it myself?
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.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How do I get a quote for window mastic in Postcombe?
Size, access and the old material all affect the cost. Call for a quick quote.
What information do you need?
Let us know what needs doing and where, plus pictures if you have them. We will ask anything else we need to know.