Kent · England
Underling Green Window Mastic
Mastic around window and door frames, sills and patio doors in Underling Green, with a 12-month guarantee on every job. Call for a quick quote.
- Hard, cracked sealant around windows
- Gaps where the sill meets the wall
- White mastic on grey or black frames
Window mastic in Underling Green, done properly
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. Common call-outs are for white mastic on grey or black frames and hard, cracked sealant around windows, across uPVC windows, aluminium frames and timber windows & doors.
Somewhere as small as Underling Green, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Your job is guaranteed for a year, as with all our work.
- Where
- Underling Green (TN12)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Underling Green
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Stoneacre (about 5 miles north-east) are a reminder that the area around Underling Green 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 Marden station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Underling Green is about 5 miles south of Maidstone, in Kent. Homes, rented property, offices and hotels in Underling Green is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Kent coverage runs to 922 places, Underling Green among them. Our Crawley page covers work nearby (31 miles or so).
Here we cover the TN12 postcode area for window mastic. We also cover the places around Underling Green: Milebush (1 mile south-west), St Ann's Green (1 mile south), Wanshurst Green (1 mile south), Cross-at-Hand (1 mile east) and Rabbit's Cross (2 miles east). Further out, we also cover Maidstone (5 miles north), Sittingbourne (14 miles north-east), Sevenoaks (15 miles north-west), Royal Tunbridge Wells (11 miles west), Tonbridge (10 miles west) and Kings Hill (7 miles north-west).
What’s near Underling Green
For rail, the closest station is Marden station, about 1.5 miles south-west. Well-known places in the area include Oakwood Hospital (5.5 miles north) and South East Romany Museum (1.3 miles south).
Places near Underling Green
What else we do in Underling Green
Do you need window mastic in Underling Green?
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, while a joint packed solid cannot stretch. That’s what backing rod is for.
If you can see any of these, it’s time to have the joints looked at:
- Black, perished sealant on frames
- Gaps where the sill meets the wall
- Damp patches on the reveal after heavy rain
- Draughty joints inside around the window
Stoneacre, about 5 miles north-east, is one of the historic houses in the wider area around Underling Green.
Comparing quotes
- What product goes in the joint
- Whether they’re fully insured
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
Landlord and commercial work in Underling Green
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
What we can’t put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Rotten timber, which needs a joiner first
- Faulty window hardware
- A failed sealed unit that has misted up
If in doubt, call 0345 464 0079 or email us and we will say what we think before you book.
Where we work in Underling Green
- Composite doors
- Aluminium frames
- Patio & French doors
- uPVC windows
- Window sills
- Timber windows & doors
Surface by surface
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We will tell you which suits your home.
Underling Green: your questions answered
I let a flat near Marden station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Underling Green within the area you cover?
Yes. Underling Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
Can I paint over the new sealant?
Not if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Can resealing stop a draught around my window?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Why it’s worth doing now in Underling Green
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Older cottages and farmhouses around Underling Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why Underling Green customers choose us
- We leave the area clean and tidy
- White, clear, grey or coloured to suit, where the product allows
- One-year guarantee on every job
- Colour picked to suit the job
See what affects the cost and customer reviews.
How the visit works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Underling Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
Ask for a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear quote before work begins.
Advice
What affects the quote in Underling Green
You will get a clear quote before any work starts. It’s based on:
- How many rooms, windows or areas are involved
- Access and height
- The type of sealant required
- How much there is to do
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
We quote each job on its own. Simply phone 0345 464 0079 or email us and describe the job and send photos if you have them.