Kent · England
Window & door mastic in Heart's Delight, Kent
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Heart's Delight. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps between the frame and the inside reveal
- Mastic that has split away from the wall
- Gaps where the sill meets the wall
How we handle window mastic in Heart's Delight
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. If you’re dealing with hard, cracked sealant around windows and sealant in the wrong colour for the frame, we can put it right, on patio & French doors, timber windows & doors and composite doors alike.
Around Heart's Delight, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Location
- Heart's Delight (ME10, ME9)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- A door that needs adjusting, rehanging or new seals
- Condensation trapped between the panes
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Window sills
How to look after the new joints
Aftercare is simple:
- Wash the frames with mild soapy water
- Do not paint over the silicone
- Keep paint and stain on wooden frames in good order
- Make sure the drainage slots are not blocked
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
FAQs for Heart's Delight
I let a flat near Sittingbourne 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.
Do you cover Heart's Delight for window mastic?
Yes. We work across London and the South East, and Heart's Delight is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Can resealing stop a draught around my window?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we will tell you.
What does window mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you do not need to watch us work.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Does the work come with a guarantee?
Yes. Our 12-month guarantee covers every job, inside or out.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes anything from an hour or two to a full day, depending on how many frames there are and we leave things clean and tidy. Somewhere like Heart's Delight needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Mention if the joints have been sealed before
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Get a quote
For window mastic in Heart's Delight, call 0345 464 0079 or send 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.
Read more
Different surfaces, different methods
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
Aluminium frames
Aluminium needs a sealant that bonds to coated metal and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Towns and villages near Heart's Delight
More services for Heart's Delight
Quotes for window mastic in Heart's Delight
You’ll get a clear quote before any work starts. It’s based on:
- How many rooms, windows or areas are involved
- The amount of work
- Access and height
- Whether old sealant or filler has to be cut out
Commercial jobs are quoted on the same basis as homes: 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 will explain what it covers.
Asking for a quote
To help us quote quickly, let us know:
- The type of property
- Photos by email, if that is easy
- The address or postcode of the job
- The problem you’ve noticed
There’s no standard price list. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or send us an email.
Frames and glazing around Heart's Delight
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.
Letting a property close to Sittingbourne station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Church of St Peter and St Paul, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Minterne Community Junior School? Then the mastic around its windows and doors needs looking after like any other building’s.
Heart's Delight is about 1 mile south-west of Sittingbourne, in Kent. Every kind of property in Heart's Delight can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Across Kent, we cover 922 places, and Heart's Delight is one of them. We also work in Chelmsford, about 30 miles from Heart's Delight.
Work in ME10 and ME9 works the same way as everywhere else we cover. You’ll find streets such as The Street, Borden Lane and Coppins Lane, and we cover them all. We also cover the places around Heart's Delight: Borden (1 mile north-west), Tunstall (1 mile south-east), Sittingbourne (1 mile north-east), Highsted (2 miles south-east) and Rodmersham Green (2 miles south-east). We also work in nearby towns such as Maidstone (9 miles south-west), Ashford (15 miles south-east), Whitstable (14 miles east), Faversham (8 miles east), Minster (7 miles north-east) and Kings Hill (14 miles west).
Near you in Heart's Delight
We work in homes and buildings around Westlands School and Cromers Wood, among other places. The closest station to Heart's Delight is Sittingbourne station, roughly 1.4 miles north-east of the centre. A little further out are Bayford Court (1.7 miles north-east) and Sittingbourne Heritage Museum (1.5 miles north-east).
Why it’s worth doing now in Heart's Delight
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Older cottages and farmhouses around Heart's Delight can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Heart's Delight customers choose us
- Homes, businesses and hotels
- Old sealant always removed completely
- Sanitary silicone with an anti-fungal additive in wet areas
- We agree the colour with you first
Read what affects the cost or customer reviews.