Hampshire · England
Window & door mastic in Newnham, Hampshire
Window and door frames in Newnham need attention? We cut out the old, prepare the joints and apply the right sealant.
- Water coming in at the bottom corners of a door
- Rushed sealant from a window installation
- Hard, cracked sealant around windows
What we’re called out for in Newnham
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
It’s worth asking for a quote if you see:
- Water coming in at the bottom corners of a door
- Mastic that is falling out in pieces
- Mastic that has split away from the wall
- Rushed sealant from a window installation
For landlords with property near Hook station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before booking anyone
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- How long the guarantee is
- What the cure time is
Window mastic in Newnham, done properly
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. If the draught is through the window seals instead, we’ll tell you. We work on uPVC windows, aluminium frames and patio & French doors, and people most often call us about gaps left after new windows were fitted and hard, cracked sealant around windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Newnham is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job comes with a 12-month guarantee, wherever you are in Hampshire.
- Location
- Newnham (RG27)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Newnham
More services for Newnham
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Newnham questions
Can you do window mastic in Newnham?
Yes. We work across London and the South East, and Newnham is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
Will you come out to Newnham?
Yes. Newnham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you get sealant to suit coloured frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Do you guarantee window mastic?
Yes, with our one-year guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or send us an email.
Can you do upstairs windows?
Generally, yes. Access is planned before work begins.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Letting agents and landlords in Newnham can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Do not aim a pressure washer at the joints
- Air rooms to keep condensation down around windows
- Keep paint off silicone joints
- Repaint timber before it’s bare
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just ring 0345 464 0079 or email us.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. A new joint closes it up.
How it works
The work is kept neat and contained to the joints we are treating. Expect the work to take 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. Somewhere like Newnham needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Let us know about parking restrictions
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
Getting a quote
There’s no standard price list. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or send us an email.
Advice
Why it’s worth doing now in Newnham
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Older cottages and farmhouses around Newnham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why Newnham customers choose us
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
- We leave the area clean and tidy
- 4.9 on Google from 180+ five-star reviews
Frames and glazing around Newnham
With historic houses such as The Vyne (about 4.6 miles west) nearby, there’s older building stock in the area around Newnham as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of St. Nicholas include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Newnham is about 5 miles east of Basingstoke, in Hampshire. Whether you’re in the middle of Newnham or further out, window mastic is available for homes and businesses alike. Newnham is one of 683 towns and villages in Hampshire where we work for window mastic. For nearby work, see our Reading page (12 miles or so).
Here we cover the RG27 postcode area for window mastic. Local streets include Tylney Lane, Newnham Lane and Ridge Lane, and we cover them all. Other places close to Newnham include Nately Scures (1 mile south), Hook Common (1 mile south-east), Up Nately (1 mile south), Hook (1 mile east) and Warnborough Green (2 miles south-east). Within a short drive, we also cover Basingstoke (5 miles west), Farnborough (10 miles east), Fleet (7 miles east), Aldershot (10 miles east), Alton (9 miles south) and Yateley (8 miles north-east).
Around Newnham
The nearest railway station is Hook station, roughly 1.2 miles east of the centre. Other landmarks nearby include Odiham Castle (1.9 miles south-east) and Basing House (2.8 miles west). The countryside around Newnham includes Dogmersfield Lake and Tundry Hill.
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. It will not solve:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- Composite doors
- uPVC windows
- Window sills