Kent · England
Sand mastic for sash & case windows in Hillborough, Kent
Specialist sand mastic for Hillborough: careful preparation, the right product and tidy work. Call for a quick quote.
- Failed mastic on an exposed elevation
- Open joints round the window box
- Old sand mastic that has cracked, crumbled or fallen out
How we handle sand mastic in Hillborough
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead and we will explain which is best for yours. We work on brick reveals, sash and case windows and timber door frames, and common reasons people get in touch are mastic round period door frames that has failed and mastic dropping out of the joint.
Around Hillborough, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
All our work comes with our 12-month guarantee, wherever you are in Kent.
- Location
- Hillborough (CT6)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In a smaller place like Hillborough, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
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 you get with us
- A 12-month guarantee on all work
- ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
Take a look at what affects the cost and our reviews.
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Avoid patching sand mastic with silicone
- Look over the window mastic once a year
- Ask us before painting near the mastic
- Clear gutters so water doesn’t pour onto the windows
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
Common questions in Hillborough
Does living near the coast affect sand mastic in Hillborough?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Will you come out to Hillborough?
Yes. Hillborough is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or email us.
What exactly is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
What sand mastic looks like in Hillborough
Hillborough is close to 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. 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.
Letting a property close to Herne Bay station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. If you live in an older home near Church of St Mary the Virgin, the joint between an old wall and a newer frame is usually the first place rain gets in.
Hillborough is about 2 miles east of Herne Bay, in Kent. Our applicators cover sand mastic for homes and businesses in Hillborough. Our Kent coverage runs to 922 places, Hillborough among them. Our Chelmsford page covers work nearby.
Here we cover the CT6 postcode area for sand mastic. That includes homes and businesses on Manor Road, Puffin Road and Neville Road and the roads around them. Hillborough is on the A299, so it’s easy for us to get to with everything needed for sand mastic. We also cover the places around Hillborough: Hawthorn (1 mile south-east), Bishopstone (1 mile north), Beltinge (1 mile north-west), Broomfield (1 mile south-west) and Highstead (1 mile south). Further out, we also cover Canterbury (7 miles south-west), Margate (9 miles east), Ramsgate (11 miles east), Broadstairs (11 miles east), Whitstable (6 miles west) and Deal (14 miles south-east).
Near you in Hillborough
Around Hillborough, our work takes us to homes and buildings near Bishopstone Cliffs and The Huntsman And Horn Public House. Hillborough’s nearest station is Herne Bay station, roughly 2.2 miles west of the centre. Well-known places in the area include Whitstable and Tankerton Hospital (5.2 miles west). The countryside around Hillborough includes West Blean and Thornden Woods.
Quotes for sand mastic in Hillborough
We do not publish a price list, because jobs vary so much. The quote depends on:
- The product the joint needs
- Mould in or behind the old joints
- The size of the job
- Whether old sealant or filler has to be cut out
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before we start.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- How we’d reach the joints
- Photos by email, if that’s easy
- What’s wrong with the joints now
- The type of property
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
What we do, step by step
On the day, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work starts. Most jobs take a few hours per window, depending on the condition of the joints. Parking around Hillborough is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- 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
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
- Clear items away from the joints we’re working on
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
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Places near Hillborough
Also in Hillborough
When to call us in Hillborough
Timber swells and shrinks with the weather. That movement opens up the mastic joint over time.
These are the problems we’re asked about most:
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
- Old sand mastic that has cracked, crumbled or fallen out
- Modern sealant on a period surround
For site and facilities teams at buildings such as Reculver Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- What guarantee comes with the work
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Whether you can choose the colour
Landlord and commercial work in Hillborough
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.