Isle of Wight · England
Sand mastic for sash & case windows in Newport, Isle of Wight
Problem with your window and door surrounds in Newport? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Mastic worn away on windows facing the weather
- Draughty sash windows at the surround
- Tired mastic found when preparing windows for paint
Why deal with it now?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and early is when they’re cheapest and quickest to sort.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will explain what it covers.
Why us?
- 4.9 on Google from 180+ five-star reviews
- One-year guarantee on every job
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
Read what affects the cost or what customers say.
About our sand mastic in Newport
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. We work on brick reveals, stone surrounds and tenement windows, and the jobs we see most are gaps where the frame meets the masonry and patchy fillers round a sash window.
Newport mixes older streets, where windows have often been replaced, with newer estates fitted with uPVC. All of them depend on a sound bead of mastic between frame and wall.
A one-year guarantee comes as standard, so you’re covered after we’ve gone.
- Place
- Newport (PO30)
- Region
- Isle of Wight
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
More services for Newport
How the visit works
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In Newport, parking is rarely complicated, though it helps to know about driveways or restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Keep pets and children clear of the area while we work
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
How to get a quote
We quote each job on its own. Simply call 0345 464 0079 or send us an email and describe the job.
Advice
Landlord and commercial work in Newport
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
FAQs for Newport
What guarantee comes with sand mastic in Newport?
All our work, in Newport and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you cover Newport for sand mastic?
Yes, Newport is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will send you a clear quote.
How long does the job take?
That depends on the amount of work, but most jobs take anything from a few hours to a full day, depending on how many windows. We will give you a better idea when we quote.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
When will the new mastic be hard?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
Where do you work from?
Our base is Crawley. Our area covers South East England, London and Scotland.
Windows and doors in Newport
With historic houses such as Carisbrooke Castle (about 1 mile south-west) nearby, there’s older building stock in the area around Newport 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. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Historic houses such as Carisbrooke Castle, about 1 mile south-west, show how far back building around Newport goes, and older homes nearby need a sealant that suits their walls. If you look after a building such as Nine Acres Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Newport is about 10 miles south-west of Gosport, in the Isle of Wight. For sand mastic in and around Newport, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover the Isle of Wight. Our the Isle of Wight coverage runs to 125 places, Newport among them. We also work in Portsmouth, around 12 miles away.
Work in PO30 works the same way as everywhere else we cover. Whether your property is on High Street, Red Fox Square and Drill Hall Road or a nearby road, we can help. Being close to the A3020 and A3054, Newport is easy for our applicators to reach. If you’re just outside Newport, we cover Shide (1 mile south-east), Blackwater (2 miles south), Downend (2 miles east), Merstone (3 miles south-east) and Rookley (3 miles south). Larger places within reach include Ryde (6 miles east), Cowes (4 miles north), Sandown (7 miles south-east), Shanklin (7 miles south-east), Ventnor (8 miles south-east) and East Cowes (4 miles north). Newport is among the bigger towns we cover in the Isle of Wight. For island and remote addresses, the job takes a little more planning, so mention it when you ask for a quote.
Around Newport
Locally, jobs take us to homes and businesses close to Seaclose Park, Castle Inn and Christ The King College, among other places. Well-known places in the area include Carisbrooke Castle (1 mile south-west) and St Mary's Hospital (0.8 miles north). The countryside around Newport includes Briddlesford Nature Reserve and Mill Hill.
How we quote for sand mastic
We don’t publish a price list. The quote depends on:
- The type of sealant required
- How many areas need sealing
- Access and height
- Whether there’s mould to deal with
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- How we’d reach the joints
- How many joints, rooms or windows are involved
- The type of property
- Where the job is, and your postcode
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
Different surfaces, different methods
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Broken panes
- Decisions on consent for listed homes
- Sashes that need overhauling
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Tenement windows
- Brick reveals