Hertfordshire · England
Sand mastic for sash & case windows in Maple Cross, Hertfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Maple Cross. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic dropping out of the joint
- Silicone on a period window that looks wrong
- Mastic round period door frames that has failed
About our sand mastic in Maple Cross
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on sash and case windows, stone surrounds and brick reveals, and people most often call us about mastic worn away on windows facing the weather and window mastic to renew ahead of painting.
In a village or hamlet like Maple Cross, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
There’s a 12-month guarantee on every job, large or small.
- Place
- Maple Cross (WD3)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- How many rooms, windows or areas are involved
- The type of sealant required
- Whether old sealant or filler has to be cut out
- Access and height
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- Pictures of the joints, sent by email
- The address or postcode of the job
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job.
What we cannot put right
We’ll always be straight with you, so here’s what sealant cannot fix:
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
- Sashes that rattle, stick or will not open
If you’re not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
What we seal
- Sash and case windows
- Tenement windows
- Timber door frames
- Brick reveals
- Stone surrounds
- Period & listed homes
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Common questions in Maple Cross
I let a flat near Rickmansworth station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Can you do sand mastic in Maple Cross?
Yes, Maple Cross is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
How long will you be here?
Most jobs take anything from a few hours to a full day, depending on how many windows, including preparation and clearing up. Your quote will say how long we expect yours to take.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can I choose the sealant colour?
Most of the time, yes. We will tell you which colours the right product comes in and agree one before work begins.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Different surfaces, different methods
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Do you need sand mastic in Maple Cross?
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber and we normally remove them.
Most people get in touch after spotting something like this:
- Weathered mastic on the most exposed windows
- Draughty sash windows at the surround
- A silicone bead on a sash window that spoils the look
- Mastic dropping out of the joint
For an older house near a landmark such as Church of St Thomas of Canterbury, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Whether they seal over old material or remove it
- Are they insured?
- How much experience the applicator has
- How the colour is chosen
Also near Maple Cross
Also in Maple Cross
What we do, step by step
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. Somewhere like Maple Cross 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 look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or send us an email.
Read more
Maple Cross homes and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Chenies Manor House (about 3.7 miles north) nearby, there’s older building stock in the area around Maple Cross as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Maple Cross Junior Mixed Infant and Nursery School, larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Rickmansworth station, any sash windows need sound mastic to keep draughts and rain out.
Maple Cross is about 2 miles south-west of Rickmansworth, in Hertfordshire. Every kind of property in Maple Cross can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Maple Cross is one of 381 towns and villages in Hertfordshire we cover for sand mastic. You can also see our page for London, roughly 20 miles from Maple Cross.
Here we cover the WD3 postcode area for sand mastic. Local streets include Pinchfield, Tichborne and Woodwicks. Other places close to Maple Cross include West Hyde (1 mile south), Horn Hill (1 mile west), Heronsgate (1 mile north), Chalfont Common (2 miles west) and Chalfont St Peter (2 miles south-west). We also work in nearby towns such as Watford (6 miles north-east), Hemel Hempstead (9 miles north), St Albans (12 miles north-east), Harpenden (15 miles north-east), Borehamwood (11 miles east) and Berkhamsted (10 miles north).
Around Maple Cross
Locally, jobs take us to homes and businesses close to The Dumb Bell pub and Rickmansworth Aquadrome. The nearest railway station is Rickmansworth station, about 2.2 miles north-east. Nearby you’ll also find Chiltern Open Air Museum (1.6 miles north-west) and Harefield Hospital (1.7 miles south-east). Green spaces nearby include Lynsters Lake and Northmoor Hill Wood.
Landlord and commercial work in Maple Cross
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.
Landlords and agents in Maple Cross can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.