Kent · England
Sand mastic for sash & case windows in Lenham Heath, Kent
Sand mastic for Lenham Heath, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cement or filler used on old window joints that has cracked
- Failed mastic on an exposed elevation
- Gaps between timber frames and stone or brick
How we handle sand mastic in Lenham Heath
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you are redecorating. We work on tenement windows, period & listed homes and sash and case windows, and the jobs we see most are cement or filler used on old window joints that has cracked and mastic round period door frames that has failed.
Outdoor sealant needs dry, clean surfaces, so work on frames around Lenham Heath is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Lenham Heath (ME17)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Where a wall is exposed, as many are in small places like Lenham Heath, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Combining jobs into one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why book with us
- Domestic, commercial and hotel work
- More than 20 years in sealant work
- ARBOMaster approved applicator
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced and what customers say.
How it works
There’s no need to move everything out before we come, just the space around the work. Everything nearby is protected, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. Somewhere like Lenham Heath needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
Getting a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.
Advice
What affects the quote in Lenham Heath
The quote reflects the job in front of us. We take into account:
- How much old sealant there is and how hard it is to remove
- The amount of work
- How many rooms, windows or areas are involved
- Which sealant suits the joint
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- The rough size of the job
- Whether it has been sealed before
- Pictures of the joints, sent by email
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear price before any work starts.
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.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Broken panes
- Decayed frames that need repair
- Sash cords, weights and draught-proofing of the sashes
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Tenement windows
Lenham Heath: your questions answered
Will you come out to Lenham Heath?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Lenham station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
What guarantee comes with the work?
Our 12-month guarantee applies on every job.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
Landlords, agents and businesses in Lenham Heath
We also work for property managers and facilities teams. Several sites can be quoted together.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Do you need sand mastic in Lenham Heath?
Rain on the window surround works into any crack and loosens it further. Exposed elevations usually fail first.
People usually contact us when they notice one of these:
- Weathered mastic on the most exposed windows
- Cracked mastic round a front door frame
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
If you live in an older home near Church of the Holy Trinity, the joint between an old wall and a newer frame is usually the first place rain gets in.
What to look for in a quote
- Whether VAT is included
- What preparation is included
- What the cure time is
- Whether you can choose the colour
What sand mastic looks like in Lenham Heath
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as The Lenham School, larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Lenham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Lenham Heath is about 8 miles north-west of Ashford, in Kent. From the centre of Lenham Heath to the outskirts, sand mastic is available for homes and businesses alike. Our Kent coverage runs to 922 places, and Lenham Heath is one of them. Chelmsford is on our list too, around 38 miles away.
We cover every part of the ME17 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on Lenham Forstal Road, Crabtree Lane and Rose Lane or anywhere close by, we can help. Other places close to Lenham Heath include Lenham Forstal (1 mile north-west), Charing Heath (1 mile south-east), Stonebridge Green (1 mile south), Leadingcross Green (2 miles north-west) and Lenham (2 miles north-west). Within a short drive, we also cover Maidstone (10 miles west), Ashford (8 miles south-east), Canterbury (15 miles east), Sittingbourne (9 miles north), Faversham (9 miles north-east) and Minster (14 miles north).
Near you in Lenham Heath
Typical jobs here are in homes near The Red Lion Inn and the streets around them. The nearest railway station is Lenham station, roughly 2 miles north-west of the centre. A little further out are Coldbridge Castle (2.4 miles south-west).