Surrey · England
Sand mastic for sash & case windows in Smallfield, Surrey
Sand mastic across Smallfield and nearby, with every bit of old sealant taken out first.
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
Sand mastic in Smallfield, done properly
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. If you have crumbling sand mastic round a window and gaps round a timber door in stone or brick, we can help.
Many houses in smaller places like Smallfield have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or email us.
- Location
- Smallfield (RH6)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a single window, longer for several. For a job in Smallfield, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- 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.
How to prepare
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
Getting a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Related advice
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 need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What happens if it’s left?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In an older home around Smallfield, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Combining jobs into one visit usually makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Why book with us
- 12-month guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- Neat joints and a tidy finish
- ARBOMaster approved applicator
Signs you need sand mastic in Smallfield
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
If you can see any of these, it’s time to have the joints looked at:
- Silicone on a period window that looks wrong
- Mastic that needs renewing before redecorating
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
For site and facilities teams at buildings such as Burstow Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- What the cure time is
- What guarantee comes with the work
- Which sealant they’ll use, and why
- What happens if the job turns out different
FAQs for Smallfield
Do you work for landlords with property near Horley station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Do you cover smaller places like Smallfield?
Yes, Smallfield is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
How long does the job take?
A typical job takes 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.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Do you remove the old sealant?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
Is consent needed for window work on a listed home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like, but they decide.
Smallfield homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Horley station, any sash windows need sound mastic to keep draughts and rain out.
Smallfield is about 2 miles east of Horley, in Surrey. We provide sand mastic to homes and businesses in Smallfield and the surrounding area, as part of our work across Surrey. We cover 395 towns and villages across Surrey.
Here we cover the RH6 postcode area for sand mastic. Streets in the area include Churchill Road, Orchard Road and Tudor Close. Neighbouring places we cover for sand mastic include Outwood (1 mile north), Burstow (1 mile south-west), Keeper's Corner (1 mile south), Fernhill (2 miles south-west) and Shipley Bridge (2 miles south-west). Further out, we also cover Epsom (13 miles north-west), Redhill (5 miles north-west), Ewell (14 miles north-west), Reigate (6 miles north-west), Caterham (8 miles north) and Dorking (10 miles north-west).
Near you in Smallfield
In Smallfield, that means homes and buildings near Oakwood School and Plough and Furrow pub and the streets around them. Smallfield’s nearest station is Horley station, roughly 2 miles west of the centre. Nearby you’ll also find Bletchingley Castle (4.5 miles north) and Effingham Park Motor Museum (2.5 miles south-east). For a walk, there’s Hedgecourt Lake.
What we can’t put right
It helps to know what we can’t do too:
- Damaged stone surrounds
- Sash cords, weights and draught-proofing of the sashes
- Decayed frames that need repair
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Stone surrounds
- Brick reveals
- Sash and case windows
- Timber door frames
- Tenement windows
- Period & listed homes
Nearby places to Smallfield
Also in Smallfield
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Look over the window mastic once a year
- Don’t paint over the new mastic
- Go gently near the mastic when preparing windows
- Keep sills and gutters clear so water drains away
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.