Medway · England
Window & door mastic in Grange, Medway
Window mastic across Grange and nearby, with every bit of old sealant taken out first.
- Black, perished sealant on frames
- Damp patches on the reveal after heavy rain
- Gaps where the sill meets the wall
How the visit works
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a handful of frames, longer for a whole house. Somewhere like Grange needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
Getting a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Read more
About our window mastic in Grange
There are two joints on most windows. 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. We work on composite doors, aluminium frames and window sills, and people most often call us about draughty joints inside around the window and untidy mastic left by window fitters.
Around Grange, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Location
- Grange (ME7, ME8)
- Wider area
- Medway
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
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.
FAQs for Grange
Is window mastic in a coastal place like Grange any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
Can you help a landlord with a rental near Gillingham (Kent) station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear quote.
Do you work in Grange?
We do. Grange is part of the area we cover.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Can you match the sealant to my frames?
Normally, yes. Mention the frame colour when you ask for a quote and we’ll use the nearest match.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
What window mastic looks like in Grange
Grange is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Historic houses like Restoration House (about 3.3 miles west) are a reminder that the area around Grange has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Letting a property close to Gillingham (Kent) station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For site and facilities teams at buildings such as Woodlands Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Grange is about 1 mile north of Gillingham, in Medway. Grange gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Medway coverage runs to 68 places, and Grange is one of them. For nearby work, see our Chelmsford page.
Postcode districts we cover here for window mastic: ME7 and ME8. Whether your property is on Grange Road, Lower Featherby Road and Odo Rise or anywhere close by, we can help. We also cover the places around Grange: Lower Twydall (1 mile south-east), Twydall (1 mile south), Gillingham (1 mile south), Darland (2 miles south-west) and Hale (2 miles south-west). We also work in nearby towns such as Chatham (3 miles south-west), Rochester (4 miles west), Strood (4 miles west), Park Wood (3 miles south), Lordswood (4 miles south-west) and Hoo St Werburgh (3 miles north).
Local landmarks in Grange
Typical jobs here are in homes near The Robert Napier School, Our Lady of Gillingham Church and Riverside Country Park. Also close by are The Hastings Arms (less than half a mile north-west) and The Robert Napier School (1.1 miles south-west). Grange’s nearest station is Gillingham (Kent) station, about 1.3 miles west of the centre. Other landmarks nearby include Huguenot Museum (3.3 miles west) and Pentagon Shopping Centre (2.4 miles west). Open spaces near Grange include Bishop Saltings.
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:
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- uPVC windows
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Composite doors
- Window sills
Signs you need window mastic in Grange
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
The most common problems we see are:
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
- Hard, cracked sealant around windows
- White mastic on grey or black frames
Homes close to Church of St Mary Magdalen include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before booking
- When the joint can take water or movement
- Who does the work, and how experienced they are
- What happens if the job turns out different
- Whether they seal over old material or remove it
What happens if it’s left?
Running fresh sealant over the old joint is tempting, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a small place like Grange, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why book with us
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- 4.9 on Google from 180+ five-star reviews
- White, clear, grey or another colour, product permitting
Read what affects the cost and customer reviews.
Places near Grange
What else we do in Grange
Landlords, agents and businesses in Grange
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Landlords and agents in Grange can book us as well as householders. Resealing between tenancies keeps a property looking cared for.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Clean frames with a soft cloth and soapy water
- Avoid blasting the frames with a pressure washer
- Air rooms to keep condensation down around windows
- Walk round the house once a year and look at the joints
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.