Essex · England
Sand mastic for sash & case windows in Hempstead, Essex
Window and door surrounds in Hempstead need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Crumbling sand mastic round a window
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
About our sand mastic in Hempstead
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. If you’re dealing with draughty sash windows at the surround and crumbling sand mastic round a window, we can put it right.
Around Hempstead, 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.
A 12-month guarantee comes as standard.
- Location
- Hempstead (CB10)
- Region
- Essex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Hempstead
Also in Hempstead
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- Access and height
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
What to tell us for a quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- Any previous sealing or DIY work
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job.
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Hempstead, the journey is planned in advance: 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 look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention if the joints have been sealed before
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
Ask for a quote
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or email us.
Advice
What the job involves on each surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Frames and glazing around Hempstead
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Hempstead, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Hempstead is in Essex. Homes, rented property, offices and hotels in Hempstead is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Hempstead is one of 644 places in Essex we cover. There’s also a page for Chelmsford, about 20 miles away.
Work in CB10 works the same way as everywhere else we cover. Local streets include High Street, Church Road and Harvey Way, and we cover them all. Neighbouring places we cover for sand mastic include The Common (2 miles west), Radwinter (2 miles west), Maple End (2 miles west), Wimbish (3 miles south-west) and Steventon End (4 miles north-west). We also work in nearby towns such as Braintree (12 miles south-east), Saffron Walden (6 miles west), Halstead (12 miles south-east), Great Dunmow (10 miles south), Stansted Mountfitchet (11 miles south-west) and Great Notley (12 miles south-east).
Landmarks near Hempstead
We work in homes and buildings around Rose And Crown Inn and the streets around them. A little further out are Castle Camps (2.7 miles north) and Saffron Walden Community Hospital (5.3 miles west). Open spaces near Hempstead include West Wood.
Questions from Hempstead
Is Hempstead in your area for sand mastic?
Yes, Hempstead is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Do you cover smaller places like Hempstead?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant, and we’ll explain why.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Is the work guaranteed?
You get our one-year guarantee on every job.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all.
Common problems we fix in Hempstead
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out so we make sure the new mastic is the right thickness.
People normally contact us when they notice one of these:
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
Homes close to Church of St Andrew include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
What to look for in a quote
- Who does the work, and how experienced they are
- Whether they’re fully insured
- Which sealant they’ll use, and why
- Whether VAT is included
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Check with your local planning authority if your home is listed
- Get any rot dealt with first
- Don’t paint over the new mastic
- Sort the mastic before the decorators arrive
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Masonry that needs repairing
- Whether work needs listed building consent
- Rotten sashes, sills or window boxes (a joiner’s job)
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before booking.
What we seal
- Brick reveals
- Sash and case windows
- Tenement windows
- Timber door frames
- Period & listed homes
- Stone surrounds