Kent · England
Lenham New Build Mastic
New build mastic for Lenham and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Second-fix sealing on new plots
- Skirting joints opening in the first winter
- Internal frame sealant that has split
FAQs for Lenham
Do you cover smaller places like Lenham?
Yes, we do. 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.
I let a flat near Lenham station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
How long does new build mastic take?
Most jobs take a few hours in a single home, including the preparation. Your quote will say how long we expect yours to take.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Is it worth trying it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Do you use white or clear sealant?
White and clear are the most common, but sealant comes in other colours too. We choose one to suit the room before we begin.
How much does new build mastic cost in Lenham?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
New build mastic in Lenham
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water reaches anything behind it. Common call-outs are for internal frame sealant that has split and sealant that never bonded to the surface, across bathrooms & en suites, plot handovers and skirting & floors.
If you’ve bought a new home in or near Lenham, the first year or two is a good time to check the sealant. Common snags include open skirting joints, lifting shower seals and gaps around frames.
We stand behind the work with a one-year guarantee.
- Where
- Lenham (ME17)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the number of plots and we leave things clean and tidy. Parking around Lenham is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
- Mention any parking rules near the property
Ask for a quote
We don’t publish a price list. Instead, we give you a clear quote for your job. To arrange one, ring 0345 464 0079 or email us.
Related advice
Joints and finishes in Lenham homes
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.
If you’ve bought a new home near Lenham station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Lenham, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Lenham is about 7 miles south of Sittingbourne, in Kent. For new build mastic in and around Lenham, please ring 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover Kent, Lenham included. Lenham is one of 922 towns and villages in Kent we cover for new build mastic. For nearby work, see our Chelmsford page (36 miles or so).
Here we cover the ME17 postcode area for new build mastic. That includes homes and businesses on High Street, Mitchell Close and Hatch Road and the roads around them. Nearby, we also carry out new build mastic in Leadingcross Green (1 mile south), Woodside Green (1 mile north-east), West Street (1 mile north-east), Lenham Forstal (2 miles south-east) and Lenham Heath (2 miles south-east). Further out, we also cover Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (7 miles north), Faversham (9 miles north-east), Minster (13 miles north) and Kings Hill (13 miles west).
Near you in Lenham
In Lenham, that means homes and buildings near Kiln Wood, The Red Lion pub and The Lenham School. There’s a railway station in Lenham itself: Lenham station. Nearby you will also find Coldbridge Castle (2.7 miles south) and The Dog Collar Museum (3.6 miles west).
DIY versus a professional finish
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What the job involves on each surface
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. It’s resealed with an exterior sealant suited to the frame and wall.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. We’ll plan around viewing times.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Get a leaking seal dealt with right away
- Wipe joints with warm soapy water
- Use the extractor fan every time you shower
- Follow the cure time we give you
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day before water reaches them.
Early snagging is easier snagging. Left alone, a small crack can become a leak.
How we quote for new build mastic
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- The number of rooms or windows
- Whether the work is at height
- The type of sealant required
- Any mould that needs treating
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What to tell us for a quote
You don’t need to know the technical terms. It helps if you can tell us:
- Any access issues, like height or stairs
- The rough size of the job
- What’s wrong with the joints now
- Whether it’s a home or a business
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work and give you a clear price.
Why deal with it now?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. Homes in smaller places like Lenham can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why choose Mr Mastic in Lenham
- Homes, businesses and hotels
- 180+ five-star Google reviews
- Old sealant always removed completely
- We’re fully insured
Read our cost guide or what customers say.
Towns and villages near Lenham
Other services in Lenham
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Baths and trays that move too much for sealant to cope with
- Disputes or warranty claims with your builder
- Cracking that points to a structural problem
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
What we seal
- Bathrooms & en suites
- Windows & doors
- Plot handovers
- Skirting & floors
- Show homes
- Kitchens