Isle of Wight · England
Sand mastic for sash & case windows in Carisbrooke, Isle of Wight
Sand mastic for Carisbrooke and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
What happens if it’s left?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. In an older home around Carisbrooke, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why Carisbrooke clients choose us
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
- Neat joints and a tidy finish
- Sanitary silicone with an anti-fungal additive in wet areas
Sand mastic in Carisbrooke
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead and we’ll explain which is best for yours. If you are dealing with old cement repairs round a window that have failed and mastic that needs renewing before redecorating, we can put it right, on sash and case windows, timber door frames and brick reveals alike.
Around Carisbrooke, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Carisbrooke (PO30)
- Region
- Isle of Wight
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Carisbrooke
More services for Carisbrooke
Your questions about sand mastic in Carisbrooke
Is Carisbrooke within the area you cover?
Yes, Carisbrooke is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is there a guarantee on sand mastic in Carisbrooke?
Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels, and we are fully insured.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
How do I get a quote for sand mastic in Carisbrooke?
Size, access and the old material all affect the cost. Ask us for a quote.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
Can you do several jobs on one visit?
Yes. Just list everything you need.
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- The size of the job
- Mould in or behind the old joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- The type of property
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
How the visit works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a single window, longer for several. In a smaller place like Carisbrooke, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Keep children and pets away from the work area
- Mention any sign-in or site rules at work premises
Getting a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or drop us an email.
Read more
Different surfaces, different methods
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Frames and glazing around Carisbrooke
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Carisbrooke Castle (about 0.3 miles south-east) are a reminder that the area around Carisbrooke 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.
Schools such as St Thomas of Canterbury Catholic Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Carisbrooke is about 1 mile south-west of Newport, in the Isle of Wight. Every kind of property in Carisbrooke is covered for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Carisbrooke is one of 125 towns and villages in the Isle of Wight where we work. There’s also a page for Portsmouth, about 13 miles away.
We work across the PO30 postcode area for sand mastic and the streets around it. Local streets include Down Lane, Purdy Road and Castle Lane, all of which we cover. We also cover the places around Carisbrooke: Clatterford (1 mile south), Gunville (1 mile north), Plaish (1 mile south-west), Bowcombe (1 mile south-west) and Gatcombe (2 miles south). Larger places within reach include Ryde (7 miles east), Cowes (5 miles north), Sandown (7 miles east), Shanklin (7 miles south-east), Ventnor (8 miles south-east) and East Cowes (5 miles north). If you’re somewhere remote, the job takes a little more planning.
Near you in Carisbrooke
Typical jobs here are in homes near Christ The King College, Seaclose Park and Island Innovation VI Form Campus. Nearby you’ll also find Isle of Wight Music Museum (1.1 miles north-east) and Carisbrooke Castle (less than half a mile south-east). Not far away are Briddlesford Nature Reserve and Brighstone Down.
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Leave the new mastic unpainted
- Check the mastic when you check the paintwork
- Plan mastic work ahead of painting
- Clear gutters so water doesn’t pour onto the windows
Don’t run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
What we’re called out for in Carisbrooke
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint, and they usually need raking out.
Signs it’s time to call us include:
- Mastic worn away on windows facing the weather
- Window mastic to renew ahead of painting
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
In the older streets around St. Mary's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Questions to ask before you book
- What product goes in the joint
- Whether they’re fully insured
- What preparation is included
- When the joint can take water or movement