Medway · England
Sand mastic for sash & case windows in Hempstead, Medway
Sand mastic for Hempstead and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Cracked mastic round a front door frame
- Silicone on a period window that looks wrong
- Wind and rain getting in round a sash window
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
- Get any rot dealt with first
- Renew mastic before redecorating the windows
Do not run silicone over the new mastic. If you see a crack, ask us to take a look rather than patching it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Sand mastic for homes and businesses in Hempstead
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we’ll talk through which suits your home. If you have modern sealant on a period surround and draughty sash windows at the surround, we can put it right.
Houses in smaller places like Hempstead can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
There’s a 12-month guarantee on every job.
- Place
- Hempstead (ME7, ME8)
- Wider area
- Medway
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
When we get to you, we check the joints match what you told us. 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 smaller place like Hempstead, 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- For indoor joints, keep the area dry beforehand if you can
- Tell us if parking is tricky
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
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What the job involves on each surface
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Why it’s worth doing now in Hempstead
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. In a smaller place like Hempstead, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Hempstead
- 12-month guarantee on every job
- Fully insured
- Arbo and Everbuild products
- Over 20 years’ experience
See what affects the cost and what customers say.
Also in Hempstead
Common questions in Hempstead
Is Hempstead within the area you cover?
Yes, Hempstead is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Rainham (Kent) station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
What do you need from me for a quote?
Tell us what needs doing and where. If we need more, we’ll ask.
Do you do commercial work?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
Is sand mastic better than silicone for my windows?
We will help you decide. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Do you offer different sealant colours?
In most cases you can choose. We’ll tell you which colours the right product comes in.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What affects the cost of sand mastic
There’s no set price list, because jobs vary so much. The quote depends on:
- How many areas need sealing
- Any mould that needs treating
- Any working-time requirements on site
- The type of sealant required
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- The address or postcode of the job
- If someone has resealed it before
- The rough size of the job
- Photos by email, if that is easy
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Whether work needs listed building consent
- Damaged stone surrounds
- Cracked or broken glass
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Where we work in Hempstead
- Stone surrounds
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
What sand mastic looks like in Hempstead
Hempstead is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. 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.
If you live in an older home near All Saints Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Hempstead Infant School, larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Rainham (Kent) station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Hempstead is about 2 miles south of Gillingham, in Medway. For sand mastic in and around Hempstead, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Medway. Across Medway, we cover 68 places, Hempstead among them. Chelmsford is on our list too, around 27 miles away.
We cover every part of ME7 and ME8 for sand mastic and the streets around it. We cover properties on Harrow Road, Spekes Road and Capstone Road and the roads around them. Hempstead is on the A278, which makes it straightforward to reach with everything needed for sand mastic. We also cover Capstone (1 mile north-west), Darland (1 mile north-west), Wigmore (1 mile east), Hale (1 mile north-west) and Park Wood (1 mile east). Within a short drive, we also cover Rochester (4 miles north-west), Strood (5 miles north-west), Hoo St Werburgh (5 miles north), Chatham Waterfront (3 miles north-west), Rochester Riverside (4 miles north-west) and Peters Village (5 miles west).
What’s near Hempstead
Locally, jobs take us to homes and businesses close to Rainham School for Girls, Howard School and South Wood and the streets around them. The nearest railway station is Rainham (Kent) station, roughly 2.1 miles north-east of the centre. Other landmarks nearby include Pentagon Shopping Centre (3 miles north-west) and Medway megaliths (3.8 miles south-west). For a walk, there’s Burham Down and Boxley Hills.
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
If you manage several properties in or around Hempstead, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.