Kent · England
Sand mastic for sash & case windows in Crockham Hill, Kent
Our applicators work in Crockham Hill on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Sand mastic for homes and businesses in Crockham Hill
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. If you have gaps where the frame meets the masonry and mastic dropping out of the joint, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Crockham Hill is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Every job comes with our 12-month guarantee.
- Where
- Crockham Hill (TN8)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Crockham Hill
More services for Crockham Hill
How the visit works
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. In a small place like Crockham Hill, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- Keep pets and children clear of the area while we work
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved.
Read more
Crockham Hill homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Chartwell (about 1 mile north-east) are a reminder that the area around Crockham Hill has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Rented homes near Edenbridge station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Crockham Hill is about 6 miles south-west of Sevenoaks, in Kent. Anywhere in TN8, we cover sand mastic for homes and businesses. Crockham Hill is one of 922 places in Kent we cover. You can also see our page for Crawley, about 14 miles away.
Work in TN8 is quoted and booked the same way as anywhere else. Whether your property is on Deanery Road, Main Road and Spout Lane or a nearby road, our applicators can take on the job. Neighbouring places we cover for sand mastic include Goodley Stock (1 mile north), Pootings (1 mile south-east), Puddledock (1 mile east), The Chart (1 mile north-west) and Troy Town (2 miles south-west). We also work in nearby towns such as Sevenoaks (6 miles north-east), Royal Tunbridge Wells (11 miles south-east), Tonbridge (10 miles east), Swanley (12 miles north-east), Kings Hill (15 miles east) and Paddock Wood (15 miles east).
Around Crockham Hill
The nearest railway station is Edenbridge station, roughly 1.9 miles south of the centre. Well-known places in the area include Hever Castle (4 miles south-east) and Haxted Watermill Museum (3.4 miles south-west). The countryside around Crockham Hill includes Betsom's Hill and Dryhill Nature Reserve.
What we cannot put right
We’ll always be straight with you, so here’s what new sealant will not do:
- Decayed frames that need repair
- Putty and glazing repairs
- Damaged stone surrounds
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Crockham Hill
- Timber door frames
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Tenement windows
- Brick reveals
Work for landlords, hotels and businesses
For anyone letting property in or around Crockham Hill, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Do you need sand mastic in Crockham Hill?
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:
- Gaps round a timber door in stone or brick
- Mastic worn away on windows facing the weather
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
In the older streets around Holy Trinity Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before booking anyone
- What happens if the job turns out different
- The length of the guarantee
- Is VAT in the price?
- Whether the sealant suits the joint
Crockham Hill questions
Do you cover smaller places like Crockham Hill?
Yes, Crockham Hill is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is Crockham Hill in your area for sand mastic?
Yes. We work across London and the South East, and Crockham Hill is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we are done.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Do you work for landlords and businesses?
Yes, regularly. Several properties can go on one quote.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How much does sand mastic cost in Crockham Hill?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can old silicone round a sash window be swapped for sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What happens if it’s left?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. In a small place like Crockham Hill, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why book with us
- An ARBOMaster approved applicator
- Homes, businesses and hotels
- Old sealant always removed completely
- Full insurance on every job
Take a look at how sealant jobs are priced or customer reviews.