Oxfordshire · England
Window & door mastic in Farnborough, Oxfordshire
Mastic around window and door frames, sills and patio doors for homes and businesses in Farnborough and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked internal joints between frame and plaster
- Old mastic that has gone black or come away
- Sealant in the wrong colour for the frame
How we handle window mastic in Farnborough
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through and quietens the whistle on windy days. If the draught is through the window seals instead, we will tell you. We’re often asked to deal with cracked sealant at the sill ends and draughty joints inside around the window, across aluminium frames, window sills and timber windows & doors.
In a village or hamlet like Farnborough, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
You’re covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Farnborough (OX12)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need window mastic in Farnborough
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
These are the problems we’re asked about most:
- Rain getting in at the frame or under the sill
- Cracked or shrunken mastic around the frame
- Gaps between the frame and the inside reveal
- Sealant in the wrong colour for the frame
In the older streets around Church of All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- Is the old sealant removed completely?
- The length of the guarantee
- Which sealant they’ll use, and why
- What the quote includes, VAT included or not
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere as small as Farnborough, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
How to prepare
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Getting a quote is simple: tell us what needs doing and where and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
Advice
Towns and villages near Farnborough
Other services in Farnborough
Surface by surface
Patio & French doors
Water at the foot of a door frame is not always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match suits the frame.
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’ll tell you before work begins. It won’t solve:
- Rotten timber, which needs a joiner first
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
- Aluminium frames
- Patio & French doors
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Ventilate rooms so frames do not stay wet inside
- Look round the frames every year or so
- Use gentle cleaners on frames and sealant
- Make sure the drainage slots aren’t blocked
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Questions from Farnborough
Is window mastic in Farnborough guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Will you come out to Farnborough?
Yes, Farnborough is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that’s a different fix, and we’ll say so.
Windows and doors in Farnborough
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In and around Farnborough, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Farnborough is about 4 miles south-east of Wantage, in Oxfordshire. Whether you’re in the middle of Farnborough or further out, window mastic is available for homes and businesses alike. Our area takes in 443 places across Oxfordshire, large and small. There’s also a page for Oxford, roughly 16 miles from Farnborough.
Every address in OX12 is within our area for window mastic. Neighbouring places we cover for window mastic include Catmore (2 miles south-east), Brightwalton (2 miles south), Brightwalton Green (2 miles south), West Ilsley (3 miles east) and Stanmore (3 miles south-east). Further out, we also cover Didcot (8 miles north-east), Abingdon-on-Thames (11 miles north), Wantage (4 miles north-west), Grove (6 miles north-west), Faringdon (12 miles north-west) and Benson (13 miles north-east).
Landmarks near Farnborough
A little further out are Atlas Computer Laboratory (3.8 miles north-east). Green spaces nearby include Letcombe Valley and Chain Hill.
Why deal with it now?
Resealing frames is a short job: it takes a few hours for a few frames, or a day or more for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Older cottages and farmhouses around Farnborough can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
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. Ask us for a quote and we’ll explain what it covers.
Why us?
- Colour agreed with you before work begins
- We leave the area clean and tidy
- We’re fully insured
- Arbo and Everbuild products
Take a look at how sealant jobs are priced or our reviews.
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.