Surrey · England
Sidlow Sand Mastic
Specialist sand mastic for Sidlow: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Open joints round the window box
- Weathered mastic on the most exposed windows
Common problems we fix in Sidlow
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
The problems people normally mention when they call include:
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Old cement repairs round a window that have failed
- Tired mastic found when preparing windows for paint
Rented homes near Salfords station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- What happens if they find a problem under the old sealant
- What the quote includes, VAT included or not
- Who turns up on the day
- What preparation is included
Sand mastic in Sidlow, done properly
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead and we’ll explain which is best for yours. We’re often asked to deal with patchy fillers round a sash window and wind and rain getting in round a sash window, across stone surrounds, brick reveals and tenement windows.
Homes in small places like Sidlow often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
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.
- Location
- Sidlow (RH2)
- Wider area
- Surrey
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Sashes that rattle, stick or will not open
- Planning or listed building consent (your local planning authority decides)
- Broken panes
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes
- Timber door frames
Sidlow: your questions answered
Do you work for landlords with property near Salfords station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
Can you do sand mastic in Sidlow?
Yes. Our work covers London and the South East, and Sidlow is part of that. You can ring 0345 464 0079 or drop us an email and tell us what needs doing.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Where are you based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you have insurance?
Yes. We are fully insured.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Is it possible to paint over sand mastic?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will talk you through it.
Towns and villages near Sidlow
What else we do in Sidlow
Why deal with it now?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. In a small place like Sidlow, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What you get with us
- Sanitary silicone with an anti-fungal additive in wet areas
- Fully insured
- We never seal over old sealant
- Approved under the ARBOMaster scheme
What we do, step by step
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours for a single window, longer for several, depending on the size of the job. For a village or hamlet like Sidlow, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Mention any parking rules near the property
How to get a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.
Related advice
What affects the quote in Sidlow
The quote reflects the job in front of us. We take into account:
- The type of sealant required
- Any mould that needs treating
- How many rooms, windows or areas are involved
- Any working-time requirements on site
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email and we will talk you through it.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Where the property is
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Landlord and commercial work in Sidlow
For anyone letting property in or around Sidlow, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
What sand mastic looks like in Sidlow
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as Dovers Green School, its window and door frames need their mastic kept sound, just like a home’s. Homes close to Emmanuel Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Sidlow is about 2 miles south of Reigate, in Surrey. If you need sand mastic in Sidlow, please phone 0345 464 0079 or email us for a quick quote. We cover Surrey from our Crawley base, Sidlow included. Sidlow is one of 395 towns and villages in Surrey we cover for sand mastic. You can also see our page for Crawley, about 7 miles away.
Postcode districts we cover here for sand mastic: RH2. If you’re just outside Sidlow, we cover Irons Bottom (1 mile south-west), South Park (1 mile north), Leigh (2 miles west), Reigate (2 miles north) and Dawesgreen (2 miles west). We also work in nearby towns such as Epsom (9 miles north), Redhill (3 miles north-east), Ewell (10 miles north), Walton-on-Thames (15 miles north-west), Caterham (7 miles north-east) and Dorking (6 miles west).
What’s near Sidlow
We work in homes and buildings around Earlswood Common, Reigate School and Burys Court School. For rail, the closest station is Salfords station, about 1.8 miles east. Nearby you’ll also find Reigate Priory Museum (2 miles north) and East Surrey Hospital (1.8 miles north-east). Open spaces near Sidlow include Colley Hill and Reigate Heath.