Kent · England
Hoo Sand Mastic
Sand mastic across Hoo and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Draughty sash windows at the surround
- Tired mastic found when preparing windows for paint
- Old sand mastic that has cracked, crumbled or fallen out
Do you need sand mastic in Hoo?
Over the years, sand mastic weathers. It dries out, cracks and loses its grip on the stone or timber.
It’s worth asking for a quote if you see:
- Crumbling sand mastic round a window
- Old cement repairs round a window that have failed
- Tired mastic found when preparing windows for paint
- Gaps where the frame meets the masonry
Schools such as Monkton Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- What insurance they hold
- What the cure time is
- What product goes in the joint
- How long the guarantee is
Sand mastic for homes and businesses in Hoo
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. If you have open joints round the window box and cement or filler used on old window joints that has cracked, we can help, whatever the surface.
Around Hoo, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Hoo (CT12)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Aftercare is simple:
- Inspect the joints round the windows every year or so
- Get any rot dealt with first
- Keep modern sealant off the mastic
- Avoid heavy scraping on the mastic joint
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Your questions about sand mastic in Hoo
Will you come out to Hoo?
Yes, Hoo is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Minster station. Can you help?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Should I use sand mastic or silicone?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames usually get a flexible sealant.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
How much does sand mastic cost in Hoo?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email with a short description of the job.
How long does sand mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to a full day, depending on how many windows. We’ll tell you when we quote.
How it works
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. Somewhere as small as Hoo, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
How to get a quote
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or email us with the details, and pictures are welcome.
Related advice
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What affects the cost of sand mastic
There’s no set price list. The quote depends on:
- The old material and how stubborn it is
- The product the joint needs
- Access and height
- Mould in or behind the old joints
What it costs depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Pictures of the joints, sent by email
- The type of property
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You’ll have a clear quote before we start.
Towns and villages near Hoo
What else we do in Hoo
Why act early in Hoo
New mastic over crumbling mastic won’t hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In a small place like Hoo, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why choose Mr Mastic in Hoo
- Quality sealants from Arbo and Everbuild
- One-year guarantee on every job
- Approved under the ARBOMaster scheme
- 180+ five-star Google reviews
Hoo homes and the weather
Historic houses like Quex Park (about 2.4 miles north-east) are a reminder that the area around Hoo 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. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of Saint Mary the Virgin, the joint between an old wall and a newer frame is normally the first place rain gets in. If you let a flat or house near Minster station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Hoo is about 5 miles south-west of Margate, in Kent. Hoo gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Across Kent, we cover 922 places, Hoo among them. Chelmsford is on our list too, around 44 miles away.
Here we cover the CT12 postcode area for sand mastic. Local streets include Monkton Road, Hoo Farm Way and Sheriffs Court Lane, and we cover them all. Nearby, we also carry out sand mastic in Monkton (1 mile west), St Nicholas at Wade (2 miles north-west), Westmarsh (2 miles south-west), East Stourmouth (2 miles south-west) and Sarre (2 miles west). We also work in nearby towns such as Canterbury (10 miles south-west), Margate (5 miles north-east), Dover (14 miles south), Ramsgate (5 miles east), Broadstairs (6 miles east) and Whitstable (11 miles west).
Around Hoo
In Hoo, that means homes and buildings near The Bell Inn, among other places. Hoo’s nearest station is Minster station, roughly 1.1 miles south-east of the centre. Well-known places in the area include Queen Elizabeth the Queen Mother Hospital (5 miles north-east) and Powell-Cotton Museum (2.2 miles north). The countryside around Hoo includes Sandwich and Pegwell Bay.