Portsmouth · England
Rudmore Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Rudmore and across Portsmouth. Fully insured, ARBOMaster approved and guaranteed for a year.
- Black, perished sealant on frames
- Mastic that has split away from the wall
- Leaking joints at the ends of sills
Window mastic for homes and businesses in Rudmore
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. The sealant then grips the two sides it should. If you are dealing with whistling draughts around closed windows and water coming in at the bottom corners of a door, we can help, whatever the surface.
Homes around Rudmore range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Rudmore (PO2, PO1)
- Region
- Portsmouth
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Rudmore
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. Around Rudmore, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and agree the price before starting.
What you get with us
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
- A 12-month guarantee on all work
- Full insurance on every job
Take a look at our cost guide and what customers say.
Other services in Rudmore
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
How to look after the new joints
Aftercare is simple:
- Make sure the drainage slots aren’t blocked
- Avoid blasting the frames with a pressure washer
- Check the mastic once a year
- Clean frames with a soft cloth and soapy water
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Rudmore questions
Can you help a landlord with a rental near Portsmouth & Southsea station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Is Rudmore within the area you cover?
Yes. Rudmore is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Are you insured?
Yes, we’re fully insured.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
How much does window mastic cost in Rudmore?
Size, access and the old material all affect the cost. Call for a quick quote.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Can you do the inside joint as well?
Yes. Indoors, we seal between the frame and the plaster or reveal.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
When to call us in Rudmore
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid can’t stretch. That’s what backing rod is for.
Common reasons people contact us include:
- Rushed sealant from a window installation
- Leaking joints at the ends of sills
- Sealant in the wrong colour for the frame
- Old mastic that has gone black or come away
For site and facilities teams at buildings such as The Flying Bull Academy, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- Which sealant they’ll use, and why
- How long to leave it before use
- Whether VAT is included
- Whether you can choose the colour
Surface by surface
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
Window sills
Stone and concrete sills have their own joints, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Window mastic in Rudmore: local notes
Rudmore is close to 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. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Portsmouth & Southsea station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Rudmore is about 1 mile north-west of Portsmouth, in Portsmouth. Homes, rented property, offices and hotels in Rudmore is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. 19 places in Portsmouth are on our list.
We work across PO2 and PO1 for window mastic. Local streets include Knox Road, Wharf Road and Croft Road, and we cover them all. Rudmore is on the M275 and A2047, so it’s easy for us to get to with everything needed for window mastic. We also cover North End (1 mile north-east), Tipner (1 mile north-west), Portsmouth (1 mile south-east), Landport (1 mile south) and Copnor (1 mile east).
Near you in Rudmore
Locally, jobs take us to homes and businesses close to Alexandra Park, The Admiral Drake pub and Mayfield School and the streets around them. The closest station to Rudmore is Portsmouth & Southsea station, about 1.1 miles south. A little further out are Tricorn Centre (0.8 miles south) and Portchester Castle (2.1 miles north-west). For a walk, there’s Milton Locks and Portsdown Hill.
How we quote for window mastic
Your quote is based on your job. We take into account:
- Any mould that needs treating
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
Combining jobs into one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- The rough size of the job
- If someone has resealed it before
- Whether it’s a home or a business
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
The process
There is not much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a few frames, or a day or more for a whole house. Parking around Rudmore is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Preparing for the visit
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
Getting a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.