Kent · England
Sand Mastic in Longfield Hill
Problem with your window and door surrounds in Longfield Hill? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Draughty sash windows at the surround
- Crumbling sand mastic round a window
- A silicone bead on a sash window that spoils the look
Landlord and commercial work in Longfield Hill
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured for the work.
About our sand mastic in Longfield Hill
Across Longfield Hill, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. We work on sash and case windows, stone surrounds and brick reveals, and the jobs we see most are mastic that needs renewing before redecorating and failed mastic on an exposed elevation.
Homes in small places like Longfield Hill often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same 12-month guarantee in Longfield Hill and across Kent.
- Location
- Longfield Hill (DA3)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Leave it or put it right?
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. Older cottages and farmhouses around Longfield Hill can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- Quality sealants from Arbo and Everbuild
- ARBOMaster approved applicator
- Homes, businesses and hotels
- We’re fully insured
Read how sealant jobs are priced or our reviews.
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows from start to finish. Somewhere like Longfield Hill 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.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
- On commercial sites, let us know about site rules
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
Read more
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also near Longfield Hill
Other services in Longfield Hill
What we’re called out for in Longfield Hill
Some old mastic was never deep enough. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
It’s worth asking for a quote if you see:
- Gaps between timber frames and stone or brick
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
For an older house near a landmark such as Church of St Mildred, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before you book
- What guarantee comes with the work
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Whether they’re fully insured
Frames and glazing around Longfield Hill
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 Cobham College (about 2.8 miles east) are a reminder that the area around Longfield Hill has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Meopham station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like Istead Rise Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Longfield Hill is about 3 miles south of Northfleet, in Kent. Every kind of property in Longfield Hill can book us for sand mastic. Every job comes with our one-year guarantee. Longfield Hill is one of 922 towns and villages in Kent where we work for sand mastic. There’s also a page for London, about 20 miles away.
Jobs for sand mastic in DA3 is quoted and booked the same way as anywhere else. You’ll find streets such as Main Road, Nurstead Lane and Ryecroft, and we cover them all. Neighbouring places we cover for sand mastic include New Barn (1 mile north-west), Hartley (1 mile west), Nash Street (1 mile north-east), Meopham (1 mile south-east) and Longfield (1 mile north-west). We also work in nearby towns such as Maidstone (12 miles south-east), Dartford (6 miles north-west), Sevenoaks (10 miles south-west), Gravesend (4 miles north-east), Tonbridge (13 miles south) and Northfleet (3 miles north).
Landmarks near Longfield Hill
Typical jobs here are in homes near Rectory Meadow and Longfield Academy. For rail, the closest station is Meopham station, roughly 1 mile east. A little further out are Stone Castle (4.5 miles north-west) and Gravesham Community Hospital (4 miles north). Open spaces near Longfield Hill include Sawyers Lake.
How we quote for sand mastic
There’s no set price list. The quote depends on:
- How easy the joints are to reach
- The old material and how stubborn it is
- The number and length of the joints
- The type of sealant required
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Roughly how big the job is
- Any previous sealing or DIY work
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
For sand mastic in Longfield Hill, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
How the job changes by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Longfield Hill questions
Do you cover smaller places like Longfield Hill?
Yes. Longfield Hill is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do sand mastic in Longfield Hill?
Yes. Our work covers London and the South East, and Longfield Hill is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Is sand mastic better than silicone for my windows?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant.
How much does sand mastic cost in Longfield Hill?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do the sealants smell?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.