Hampshire · England
Lower Farringdon Window Mastic
Specialist window mastic for Lower Farringdon: careful preparation, the right product and tidy work. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Draughty joints inside around the window
- Leaking joints at the ends of sills
What happens if it’s left?
Not every sealant suits a window. Interior caulk and bathroom silicone aren’t made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Older cottages and farmhouses around Lower Farringdon can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
Why Lower Farringdon clients choose us
- White, clear, grey or another colour, product permitting
- Anti-fungal silicone where joints get wet
- Homes, businesses and hotels
- Colour agreed with you before any work starts
Read what affects the cost and what customers say.
Window mastic in Lower Farringdon, done properly
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on timber windows & doors, window sills and uPVC windows, and people most often call us about cracked internal joints between frame and plaster and gaps left after new windows were fitted.
Somewhere as small as Lower Farringdon, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Lower Farringdon (GU34)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Lower Farringdon
What else we do in Lower Farringdon
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Landlord and commercial work in Lower Farringdon
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Your questions about window mastic in Lower Farringdon
Can you do window mastic in Lower Farringdon?
Yes. Our work covers London and the South East, and Lower Farringdon is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Alton station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Can new window sealant be painted?
Silicone generally won’t take paint. Let us know beforehand, and we’ll use a paintable product where it suits.
Does the work come with a guarantee?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Will resealing my frames help with draughts?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Different surfaces, different methods
Composite doors
A composite door normally sits in a plastic outer frame, and the joint around it is sealed like a window. The bead is colour-matched to the frame.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
When to call us in Lower Farringdon
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
Signs it’s time to call us include:
- Leaking joints at the ends of sills
- Mastic that has split away from the wall
- Rain getting in at the frame or under the sill
- Gaps between the frame and the inside reveal
For an older house near a landmark such as Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- The length of the guarantee
- How the joint is cleaned and prepared
- Is VAT in the price?
- Is the old sealant removed completely?
Windows and doors in Lower Farringdon
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Bentworth Hall (about 3.5 miles north-west) are a reminder that the area around Lower Farringdon has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Letting a property close to Alton station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Lower Farringdon is about 3 miles south of Alton, in Hampshire. For window mastic in and around Lower Farringdon, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Hampshire from our Crawley base, Lower Farringdon included. Lower Farringdon is one of 683 places in Hampshire where we work. You can also see our page for Portsmouth, about 21 miles away.
We cover every part of GU34 for window mastic and the streets around it. Whether your property is on Gosport Road, Brightstone Lane and Shirnall Meadow or a nearby road, our applicators can take on the job. Close by, we work in Farringdon (1 mile east), Upper Farringdon (1 mile east), Chawton (2 miles north), Hartley Mauditt (2 miles east) and Alton (3 miles north). Larger places within reach include Basingstoke (12 miles north-west), Winchester (14 miles west), Fleet (13 miles north-east), Horndean (14 miles south), Aldershot (14 miles north-east) and Petersfield (8 miles south).
Landmarks near Lower Farringdon
In Lower Farringdon, that means homes and buildings near Royal Oak pub and the streets around them. Lower Farringdon’s nearest station is Alton station, about 3 miles north. Other landmarks nearby include Alton Community Hospital (2 miles north) and The Romany Museum (2.6 miles south-east). Green spaces nearby include Red Hill.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Keep jet washers away from the mastic
- Make sure the drainage slots are not blocked
- Use gentle cleaners on frames and sealant
- Check the mastic once a year
Most silicone sealants won’t take paint, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
How it works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a morning for a couple of windows and a door. Somewhere like Lower Farringdon needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
How to prepare
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
How to get a quote
If you are in Lower Farringdon and need window mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.