Kent · England
Lewson Street Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Lewson Street. Fully insured, ARBOMaster approved and guaranteed for a year.
- White mastic on grey or black frames
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
Window mastic for homes and businesses in Lewson Street
Homes in Lewson Street have every kind of window: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you’re dealing with black, perished sealant on frames and water coming in at the bottom corners of a door, we can help, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Lewson Street is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, you get the same one-year guarantee in Lewson Street and across Kent.
- Where
- Lewson Street (ME9)
- Region
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a few frames, or a day or more for a whole house. Somewhere like Lewson Street 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 confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Try not to wet indoor joints just before the visit
- For business premises, tell us about site rules or sign-in
- Let us know about stairs, lifts or work at height
Ask for a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Related advice
Different surfaces, different methods
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. We use a neutral-cure product.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. If we find rot, we’ll tell you before going ahead, as that is a job for a joiner.
Window mastic in Lewson Street: local notes
Lewson Street is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of St Mary, the joint between an old wall and a newer frame is generally the first place rain gets in. Schools such as Teynham Parochial Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Lewson Street is about 3 miles west of Faversham, in Kent. If you need window mastic in Lewson Street, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Kent. Our area takes in 922 places across Kent, large and small. For nearby work, see our Chelmsford page (32 miles or so).
All of ME9 is within our area for window mastic. Whether your property is on World's End, Lewson Street Road and Norton Road or a nearby road, our applicators can take on the job. Neighbouring places we cover for window mastic include Tickham (1 mile south-west), Norton Ash (1 mile north-east), Loyterton (1 mile south-west), Deerton Street (1 mile north-east) and Teynham (1 mile north-west). We also work in nearby towns such as Maidstone (13 miles west), Ashford (12 miles south), Canterbury (12 miles east), Sittingbourne (4 miles north-west), Whitstable (10 miles east) and Faversham (3 miles east).
Around Lewson Street
In Lewson Street, that means homes and buildings near The Plough Inn, among other places. The nearest railway station is Teynham station, about 1.3 miles north-west. A little further out are Sittingbourne Heritage Museum (3.6 miles north-west) and Newnham Castle (2.2 miles south).
Common problems we fix in Lewson Street
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. Backing rod sets the right depth.
Keep an eye out for any of the following:
- Water coming in at the bottom corners of a door
- Cracked internal joints between frame and plaster
- Rushed sealant from a window installation
- A bead that does not match the frame
If you let a flat or house near Teynham station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before you book
- How much experience the applicator has
- Whether all the old sealant comes out first
- Are they insured?
- Which colour the sealant will be
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Places near Lewson Street
Also in Lewson Street
FAQs for Lewson Street
Is Lewson Street within the area you cover?
Yes, Lewson Street is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Teynham station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Can you reach windows above the ground floor?
Yes, where they can be reached safely. Tell us about access when you get in touch and we will plan for it.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you have sealant for grey or black windows?
Generally, yes. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
What we cannot put right
A few problems are outside what sealant work can do:
- A frame that has rotted at the joint
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Aluminium frames
- Composite doors
- Timber windows & doors
- Patio & French doors
- Window sills
- uPVC windows
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Make sure the drainage slots aren’t blocked
- Keep solvents and bleach off the sealant
- Keep jet washers away from the mastic
- Wipe condensation off the frames
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or email us.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What happens if it’s left?
Not every sealant suits a window. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Where a wall is exposed, as many are in small places like Lewson Street, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
Why choose Mr Mastic in Lewson Street
- Homes, businesses and hotels
- Arbo and Everbuild products
- 20+ years of sealant experience
- Any old sealant cut out fully, not covered over
See what affects the cost and customer reviews.