Hampshire · England
Window Mastic in Bentworth
Mastic around window and door frames, sills and patio doors for Bentworth, backed by a one-year guarantee. Ask us for a quote.
- Rain getting in at the frame or under the sill
- Gaps where the sill meets the wall
- Mastic that is falling out in pieces
Common questions in Bentworth
Is Bentworth within the area you cover?
Yes, Bentworth is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do window mastic in Bentworth?
Yes. We work across London and the South East, and Bentworth is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Do you work for landlords and businesses?
Yes. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Are you insured?
Yes. We are fully insured for every job we do.
How many windows can you do in a day?
The work takes a few hours for a few frames, or a day or more for a whole house. Access and the amount of old mastic make the biggest difference.
Can new window sealant be painted?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
When is the sealant fully cured?
It depends on the product. We tell you how long to leave it before we go.
Window mastic in Bentworth, done properly
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. Common call-outs are for rain getting in at the frame or under the sill and cracked sealant at the sill ends, across timber windows & doors, composite doors and patio & French doors.
Mastic can only go onto a dry, clean joint, so window work in Bentworth is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Bentworth (GU34)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Bentworth
For a quick quote, just ask. What matters most is:
- Whether there’s mould to deal with
- The product the joint needs
- The number and length of the joints
- Whether the work is at height
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email and we’ll talk you through it.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Whether it has been sealed before
- The type of property
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
More services for Bentworth
Why it’s worth doing now in Bentworth
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Older cottages and farmhouses around Bentworth can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We will send you a clear quote for the lot.
Why choose Mr Mastic in Bentworth
- Homes, businesses and hotels
- Over 20 years’ experience
- White, clear, grey or another colour, product permitting
- We never seal over old sealant
Take a look at how sealant jobs are priced or our reviews.
What window mastic looks like in Bentworth
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Hall Place (about 0.2 miles south-west) are a reminder that the area around Bentworth 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.
If you let a flat or house near Alton station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. In the older streets around St. Mary's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Bentworth is about 3 miles west of Alton, in Hampshire. Homes, rented property, offices and hotels in Bentworth can book us for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Bentworth is one of 683 places in Hampshire we cover. You can also see our page for Reading, roughly 20 miles from Bentworth.
Every address in GU34 is within our area for window mastic. If you need window mastic at a property on Village Street, Church Street and Drury Lane or a nearby road, we can help. Close by, we work in Holt End (1 mile south-west), Thedden (1 mile south-east), Wivelrod (1 mile south-east), New Copse (1 mile south-west) and Beech (2 miles south-east). Further out, we also cover Basingstoke (8 miles north), Winchester (13 miles south-west), Farnborough (15 miles north-east), Fleet (12 miles north-east), Aldershot (14 miles north-east) and Alton (3 miles east).
Landmarks near Bentworth
In Bentworth, that means homes and buildings near The Star Inn, among other places. Bentworth’s nearest station is Alton station, roughly 3.5 miles east of the centre. A little further out are Barton Castle (3.2 miles south-west) and Gliding Heritage Centre (2.2 miles north-east). Open spaces near Bentworth include King's Hill.
How the visit works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a morning for a couple of windows and a door, and the area is left clean. Somewhere like Bentworth needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- 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
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
- On commercial sites, let us know about site rules
Getting a quote
For window mastic in Bentworth, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Related advice
How the job changes by surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
How to look after the new joints
To keep the joints looking good and working properly:
- Keep paint and stain on wooden frames in good order
- Walk round the house once a year and look at the joints
- Do not use solvent cleaners on the joint
- Clean frames with a soft cloth and soapy water
Silicone can’t generally be painted, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. Resealing closes it.
Do you need window mastic in Bentworth?
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, and a gap filled solid cannot flex. That’s what backing rod is for.
Keep an eye out for these signs:
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
- Mastic that is falling out in pieces
- Rain getting in at the frame or under the sill
For site and facilities teams at buildings such as St Mary's Bentworth Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Which colour the sealant will be
- Whether they’re fully insured
- How much experience the applicator has
- What guarantee comes with the work