Isle of Wight · England
Sand mastic for sash & case windows in Whitwell, Isle of Wight
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Whitwell, backed by a 12-month guarantee. Ask us for a quote.
- Mastic that needs renewing before redecorating
- A silicone bead on a sash window that spoils the look
- Wind and rain getting in round a sash window
How we handle sand mastic in Whitwell
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We are often asked to deal with modern sealant on a period surround and draughts and rain around sash boxes, across stone surrounds, timber door frames and tenement windows.
Mastic can only go onto a dry, clean joint, so window work in Whitwell is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We stand behind the work with a one-year guarantee.
- Location
- Whitwell (PO38)
- Region
- Isle of Wight
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Windows and doors in Whitwell
Whitwell is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Historic houses like Sheat Manor (about 4.4 miles north) are a reminder that the area around Whitwell has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
In the older streets around Church of St. Mary and St. Radegund, the joint between an old wall and a newer frame is usually the first place rain gets in. If you let a flat or house near Shanklin station, any sash windows need sound mastic to keep draughts and rain out. Managing a site like Niton Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Whitwell is about 7 miles south of Newport, in the Isle of Wight. Homes, rented property, offices and hotels in Whitwell is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Whitwell is one of 125 towns and villages in the Isle of Wight we cover. You can also see our page for Portsmouth, roughly 17 miles from Whitwell.
We cover every part of the PO38 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on High Street, Bannock Road and Nettlecombe Lane or a nearby road, we can help. If you are just outside Whitwell, we cover Nettlecombe (1 mile north-east), Bierley (1 mile west), Southford (1 mile north-west), Niton (1 mile south-west) and St Lawrence (1 mile south-east). Within a short drive, we also cover Newport (7 miles north), Ryde (10 miles north-east), Cowes (11 miles north), Sandown (6 miles north-east), Shanklin (4 miles north-east) and East Cowes (11 miles north). If you’re somewhere remote, the job takes a little more planning, so mention it when you ask for a quote.
Around Whitwell
We work in homes and buildings around The White Horse Inn. The closest station to Whitwell is Shanklin station, roughly 4.5 miles north-east. A little further out are Arthur Webster Memorial Hospital for Children (4.5 miles north-east) and Blackgang Sawmill Museum (2.2 miles west). Green spaces nearby include Stenbury Down.
FAQs for Whitwell
Is Whitwell within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Shanklin station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Should I check with the council before work on a listed or conservation-area home?
Your local planning authority is the one to ask. They decide whether consent is needed.
Can you replace silicone on a period window with sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Can I choose the sealant colour?
Yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before any work starts.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures.
When will the new mastic be hard?
It skins over fairly quickly but takes longer to harden fully. We will explain what to expect before we leave.
Which is right for my windows, sand mastic or modern sealant?
We’ll help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours per window, depending on the condition of the joints. In a small place like Whitwell, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Related advice
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Decayed frames that need repair
- Whether work needs listed building consent
- Sashes that rattle, stick or won’t open
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Stone surrounds
- Tenement windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Find out about consent before window work on a listed home
- Go gently near the mastic when preparing windows
- Inspect the joints round the windows every year or so
- Renew mastic before redecorating the windows
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
What the job involves on each surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
What affects the cost of sand mastic
The quote reflects the job in front of us. We look at:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Whether there’s mould to deal with
- Any working-time requirements on site
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
What to tell us for a quote
To help us quote quickly, let us know:
- Where the property is
- If it’s domestic, commercial or a hotel
- The rough size of the job
- Any previous sealing or DIY work
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Towns and villages near Whitwell
More services for Whitwell
Why act early in Whitwell
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. In a small place like Whitwell, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why Whitwell clients choose us
- An ARBOMaster approved applicator
- Homes, businesses and hotels
- Anti-fungal silicone where joints get wet
- More than 20 years in sealant work
Take a look at how sealant jobs are priced or what customers say.
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 is fine. We remove it and do the joint properly, so just mention it when you contact us.