Hertfordshire · England
Sand Mastic in Rickmansworth
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Rickmansworth, with a 12-month guarantee on every job. Ask us for a quote.
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
- Old sand mastic that has cracked, crumbled or fallen out
How it works
We keep the work tidy and contained to the area we are working on, so you can get on with your day. The job usually takes anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. In Rickmansworth, parking is rarely complicated, though it helps to know about driveways or restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- 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
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. We will explain what we’d do and give you a clear quote before work begins.
Advice
About our sand mastic in Rickmansworth
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with weathered mastic on the most exposed windows and mastic that needs renewing before redecorating, we can help.
Plenty of homes in a town like Rickmansworth have had conservatories, patio doors or new windows added over the years. Each one adds more joints to look after, and those joints age at different rates. Leaks generally start at a sill, a frame head or a glazing joint.
Every job comes with our 12-month guarantee.
- Place
- Rickmansworth (WD3, WD18)
- Region
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Rickmansworth
More services for Rickmansworth
Rickmansworth: your questions answered
I let a flat near Rickmansworth station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is sand mastic in Rickmansworth guaranteed?
All our work, in Rickmansworth and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or email us.
Can I add another job to the visit?
Yes. Just list everything you need.
Do you work in Rickmansworth?
Yes. We’re based in Crawley and work across South East England, London and Scotland, Rickmansworth included.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Why act early in Rickmansworth
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad, and renewing the mastic closes them. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why choose Mr Mastic in Rickmansworth
- Domestic, commercial and hotel work
- ARBOMaster approved applicator
- We are fully insured
- Old sealant always removed completely
Read how sealant jobs are priced or our reviews.
What affects the cost of sand mastic
Every job gets its own quote. This is what makes a difference:
- Which sealant suits the joint
- Access and height
- How much there is to do
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Asking for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- Roughly how big the job is
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or send us an email.
What sand mastic looks like in Rickmansworth
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. With historic houses such as Chenies Manor House (about 3.7 miles north-west) nearby, there’s older building stock in the area around Rickmansworth as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like Saint Joan of Arc Catholic School? Then the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Rickmansworth station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Rickmansworth is about 3 miles south-west of Watford, in Hertfordshire. Rickmansworth gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Rickmansworth is one of 381 places in Hertfordshire we cover. Our London page covers work nearby (19 miles or so).
Work in WD3 and WD18 works the same way as everywhere else we cover. Local streets include High Street, Station Road and London Road, all of which we cover. You’ll find Rickmansworth on the A404 and A412, so it’s easy for us to get to with everything needed for sand mastic. Neighbouring places we cover for sand mastic include Batchworth (1 mile south), Chorleywood West (1 mile north-west), Croxley Green (1 mile north-east), Mill End (1 mile west) and Woodcock Hill (1 mile south). Larger places within reach include Watford (3 miles north-east), Hemel Hempstead (8 miles north), St Albans (10 miles north-east), Harpenden (13 miles north), Hatfield (13 miles north-east) and Borehamwood (8 miles east).
Around Rickmansworth
In Rickmansworth, that means homes and buildings near Rickmansworth Park Junior Mixed and Infant School, Rickmansworth Park and The Coach And Horses Public House. There’s a railway station in Rickmansworth itself: Rickmansworth station. A little further out are Chiltern Open Air Museum (3.2 miles west) and Charter Place (3.2 miles east). Open spaces near Rickmansworth include Chorleywood Common and Tumbling Bay.
When something else is needed
New sealant cannot fix everything, and we will tell you before work begins. It will not solve:
- Damaged stone surrounds
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
When to call us in Rickmansworth
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint, and they normally need raking out.
Common reasons people contact us include:
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
In the older streets around Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- Whether they’re fully insured
- What guarantee comes with the work
- Is VAT in the price?
- What happens if they find a problem under the old sealant