Hertfordshire · England
Sand mastic for sash & case windows in Bedmond, Hertfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Bedmond, with a 12-month guarantee on every job. Ask us for a quote.
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
- Old cement repairs round a window that have failed
What happens on the day
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. Most jobs take a few hours for a single window, longer for several. Somewhere like Bedmond needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
Get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or email us.
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Sand mastic for homes and businesses in Bedmond
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 work on brick reveals, tenement windows and timber door frames, and common reasons people get in touch are modern sealant on a period surround and gaps where the frame meets the masonry.
Mastic can only go onto a dry, clean joint, so window work in Bedmond is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Bedmond (WD5)
- Wider area
- Hertfordshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. Sealant will not put right:
- Planning or listed building consent (your local planning authority decides)
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Bedmond
- Tenement windows
- Stone surrounds
- Period & listed homes
- Timber door frames
- Brick reveals
- Sash and case windows
Quotes for sand mastic in Bedmond
The quote reflects the job in front of us. We take into account:
- The number of rooms or windows
- Whether the work is at height
- The type of sealant required
- How much there is to do
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
To help us quote quickly, please include:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
- Roughly how big the job is
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
What sand mastic looks like in Bedmond
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. Historic houses like High Elms Manor (about 1.5 miles south-east) are a reminder that the area around Bedmond 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’s traditional sand mastic.
For an older house near a landmark such as Church of the Ascension, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Kings Langley station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like Bedmond Academy? Then larger buildings have plenty of frames, and the mastic around each one ages.
Bedmond is about 3 miles south-east of Hemel Hempstead, in Hertfordshire. Jobs in Bedmond get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Bedmond is one of 381 towns and villages in Hertfordshire where we work for sand mastic. London is on our list too, around 20 miles away.
Jobs for sand mastic in WD5 is quoted and booked the same way as anywhere else. If you need sand mastic at a property on High Street, Woodland Way and Bluebell Drive or a nearby road, we can help. Close by, we work in Pimlico (1 mile north), Abbots Langley (1 mile south), Kings Langley (2 miles west), Nash Mills (2 miles west) and Westwick Row (2 miles north). Within a short drive, we also cover Watford (4 miles south), Hemel Hempstead (3 miles north-west), St Albans (4 miles north-east), Welwyn Garden City (11 miles north-east), Harpenden (7 miles north) and Cheshunt (15 miles east).
What’s near Bedmond
Around Bedmond, our work takes us to homes and buildings near Parmiter's School and The Bell Public House and the streets around them. The closest station to Bedmond is Kings Langley station, about 1.6 miles south-west. Other landmarks nearby include Hypocaust Museum (3 miles north-east) and Village Arcade St Albans (3.7 miles north-east). Not far away are Verulamium Lake and Longspring Wood.
Leave it or put it right?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. In a small place like Bedmond, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we will explain what it covers.
Why Bedmond clients choose us
- Every job guaranteed for a year
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost and what customers say.
Your questions about sand mastic in Bedmond
Do you work for landlords with property near Kings Langley station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Bedmond for sand mastic?
Yes, Bedmond is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
Is the work guaranteed?
Our 12-month guarantee covers every job.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Can I choose the sealant colour?
In most cases you can choose. We will explain which colours are available.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Where is Mr Mastic based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Also near Bedmond
Other services in Bedmond
Landlord and commercial work in Bedmond
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Check the mastic when you check the paintwork
- Check with your local planning authority if your home is listed
- Make sure water runs off the sill
- Do not run silicone over sand mastic
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.