Isle of Wight · England
Locksgreen Window Mastic
Specialist window mastic for Locksgreen: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Water coming in at the bottom corners of a door
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
Window mastic in Locksgreen
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before we start. To get one, phone 0345 464 0079 or drop us an email with the number of frames and any access details. Common call-outs are for damp patches on the reveal after heavy rain and mastic that has split away from the wall, on uPVC windows, aluminium frames and composite doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around Locksgreen is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Location
- Locksgreen (PO30)
- Wider area
- Isle of Wight
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When to call us in Locksgreen
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
If you can see any of these, it’s time to have the joints looked at:
- Rain getting in at the frame or under the sill
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
Historic houses such as Swainston Manor, about 1.7 miles south, show how far back building around Locksgreen goes, and older homes nearby need a sealant that suits their walls.
Questions to ask before booking
- What happens if they find a problem under the old sealant
- How the colour is chosen
- How much experience the applicator has
- Whether they seal over old material or remove it
Aftercare tips
So the new joints stay in good condition:
- Air rooms to keep condensation down around windows
- Keep drainage slots and sill grooves clear
- Wash the frames with mild soapy water
- Keep paint off silicone joints
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Common questions in Locksgreen
Do you cover smaller places like Locksgreen?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Locksgreen for window mastic?
Yes. Our work covers London and the South East, and Locksgreen is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear price.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Locksgreen, along with the rest of our area.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
Will new mastic stop draughts?
It will if the frame joint is the problem. We check where the draught is before any work starts.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we are done.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. If we need more, we will ask.
How it works
On the day, we look over the joints with you first, so there are no surprises. Surfaces next to the work are protected before we start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. In a small place like Locksgreen, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
How to get a quote
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Advice
What the job involves on each surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal. Neutral-cure sealant is the safe choice.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
Window mastic in Locksgreen: local notes
Locksgreen is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Locksgreen, as everywhere, window mastic is only as good as the preparation behind it.
Locksgreen is about 3 miles west of Newport, in the Isle of Wight. From the centre of Locksgreen to the outskirts, window mastic is available for homes and businesses alike. Across the Isle of Wight, we cover 125 places, and Locksgreen is one of them. For nearby work, see our Southampton page.
Here we cover the PO30 postcode area for window mastic. Nearby, we also carry out window mastic in Porchfield (1 mile north-east), Newtown (1 mile west), Great Thorness (1 mile north-east), Forest Side (2 miles east) and Noke Common (3 miles east). Within a short drive, we also cover Newport (3 miles east), Ryde (9 miles east), Cowes (4 miles north-east), Sandown (10 miles south-east), Shanklin (10 miles south-east) and Ventnor (11 miles south-east). Remote and island addresses need a little more planning, so please mention your location when you ring 0345 464 0079 or email us.
Landmarks near Locksgreen
Typical jobs here are in homes near Sportsman's Rest pub and the streets around them. Other landmarks nearby include Calbourne Water Mill And Rural Museum (3 miles south-west) and Carisbrooke Castle (3.1 miles south-east). For a walk, there’s Brighstone Down.
What sealant work can’t fix
We will always be straight with you, so here’s what sealant cannot fix:
- Soft or decayed wood in the frame
- Damp coming through the wall itself rather than the frame joint
- Worn gaskets, brush seals or a door that has dropped
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Window sills
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Timber windows & doors
Nearby places to Locksgreen
Also in Locksgreen
Why deal with it now?
Working on frames from a ladder with a sealant gun is not easy, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. In a small place like Locksgreen, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why Locksgreen customers choose us
- Full insurance on every job
- Sealant colour chosen to suit
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
Take a look at how sealant jobs are priced or what customers say.