Kent · England
Sand Mastic in Fawkham Green
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Fawkham Green, backed by a one-year guarantee. Call for a quick quote.
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
- Wind and rain getting in round a sash window
Sand mastic for homes and businesses in Fawkham Green
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. If you have gaps where the frame meets the masonry and cracked mastic round a front door frame, we can help.
Mastic can only go onto a dry, clean joint, so window work in Fawkham Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Your job is guaranteed for a year, as with all our work.
- Where
- Fawkham Green (DA3)
- Region
- Kent
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Fawkham Green homes and the weather
Historic houses like Lullingstone Castle (about 3.6 miles west) are a reminder that the area around Fawkham Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
If you live in an older home near Parish Church of Saint Peter and Saint Paul, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to Longfield station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Fawkham Green is about 6 miles south-west of Northfleet, in Kent. Wherever you are in the DA3 postcode area, our applicators can take on sand mastic. 922 places in Kent are on our list, from the larger towns to small villages. Our London page covers work nearby (19 miles or so).
Postcode districts we cover here for sand mastic: DA3. We cover properties on Fawkham Green Road, Brands Hatch Road and Valley Road. Other places close to Fawkham Green include Speed Gate (1 mile north-west), West Yoke (1 mile east), Ash (1 mile south-east), West Kingsdown (2 miles south-west) and Maplescombe (2 miles west). We also work in nearby towns such as Maidstone (13 miles south-east), Dartford (6 miles north-west), Sevenoaks (7 miles south-west), Gravesend (6 miles north-east), Tonbridge (12 miles south) and Northfleet (6 miles north-east).
Near you in Fawkham Green
Locally, jobs take us to homes and businesses close to Longfield Academy and The Rising Sun pub. Fawkham Green’s nearest station is Longfield station, about 2.3 miles north-east. Nearby you’ll also find Eynsford Castle (2.9 miles west) and Darent Valley Hospital (4.9 miles north).
Common questions in Fawkham Green
Can you do sand mastic in Fawkham Green?
Yes. We work across London and the South East, and Fawkham Green is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Longfield station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Should I use sand mastic or silicone?
We’ll help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
What does sand mastic cost?
Size, access and the old material all affect the cost. Ask us for a quote and we will talk you through it.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Can I choose the sealant colour?
In most cases you can choose. We’ll explain which colours are available and agree one before we start.
How long does the job take?
A typical job takes a few hours per window, depending on the condition of the joints, including the preparation. We will confirm how long when we quote.
Are you fully insured?
Yes. We’re fully insured.
Common problems we fix in Fawkham Green
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber, and they generally need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Failed mastic on an exposed elevation
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
- Patchy fillers round a sash window
If you look after a building such as New Ash Green Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Is the old sealant removed completely?
- What preparation is included
- How long the guarantee is
- What the cure time is
Why act early in Fawkham Green
New mastic over crumbling mastic will not hold. We remove the loose material first so the new work lasts. Where a wall is exposed, as many are in small places like Fawkham Green, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- Domestic, commercial and hotel work
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
- Rated 4.9 stars on Google
Places near Fawkham Green
Also in Fawkham Green
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Make sure water runs off the sill
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Ask us before painting near the mastic
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber and timber that stays wet can rot.
What happens on the day
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the job takes a few hours for a single window, longer for several in most cases. Somewhere like Fawkham Green needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- 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.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or drop us an email.
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Should I try it myself first?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- Mould in or behind the old joints
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- Access and height
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- Whether it has been sealed before
- The rough size of the job
- The problem you’ve noticed
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details and send photos if you have them.
Landlords, agents and businesses in Fawkham Green
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.