Portsmouth · England
Rudmore Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Rudmore, with a one-year guarantee on every job. Ask us for a quote.
- Mastic dropping out of the joint
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Sand mastic in Rudmore, done properly
Sand mastic does not last for ever and gaps open up round the frame. Renewing it closes the gap and tidies the surround. If you have cement or filler used on old window joints that has cracked and silicone on a period window that looks wrong, we can put it right.
Many houses in smaller places like Rudmore have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Rudmore (PO2, PO1)
- Wider area
- Portsmouth
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Do you need sand mastic in Rudmore?
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
People generally contact us after spotting one of these:
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
- Open joints round the window box
- Silicone on a period window that looks wrong
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.
What to look for in a quote
- Whether the sealant suits the joint
- How long to leave it before use
- What guarantee comes with the work
- Who does the work, and how experienced they are
Surface by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Timber door frames
Round a period front door, sand mastic gives the right look.
Rudmore: your questions answered
Is sand mastic in a coastal place like Rudmore any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Can you help a landlord with a rental near Portsmouth & Southsea station?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Do you have insurance?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
How much does sand mastic cost in Rudmore?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email and let us know what needs doing and where.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Can I choose the sealant colour?
Usually, yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
What sand mastic looks like in Rudmore
Rudmore is close to 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 older windows and doors, 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.
For landlords with property near Portsmouth & Southsea station, any sash windows need sound mastic to keep draughts and rain out.
Rudmore is about 1 mile north-west of Portsmouth, in Portsmouth. From the centre of Rudmore to the outskirts, sand mastic is available for homes and businesses alike. We cover 19 towns and villages across Portsmouth.
Every address in PO2 and PO1 is within our area for sand mastic, from the main roads to the quietest streets. You will find streets such as Knox Road, Wharf Road and Croft Road, and we cover them all. You’ll find Rudmore on the M275 and A2047, so it’s easy for us to get to. If you’re just outside Rudmore, we 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).
Local landmarks in Rudmore
In Rudmore, that means homes and buildings near Alexandra Park, The Admiral Drake pub and Mayfield School, among other places. Rudmore’s nearest station is Portsmouth & Southsea station, about 1.1 miles south. Nearby you will also find Tricorn Centre (0.8 miles south) and Portchester Castle (2.1 miles north-west). Not far away are Milton Locks and Portsdown Hill.
How we quote for sand mastic
For a quick quote, just ask. What matters most is:
- Access and height
- The number and length of the joints
- Any mould that needs treating
- The old material and how stubborn it is
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- If someone has resealed it before
- The type of property
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or send us an email.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Get any rot dealt with first
- Keep modern sealant off the mastic
- Ask us before painting near the mastic
- Avoid heavy scraping on the mastic joint
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Leave it or put it right?
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Homes in smaller places like Rudmore can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why us?
- Arbo and Everbuild products
- Neat joints and a tidy finish
- 20+ years of sealant experience
- Old sealant always removed completely
Take a look at how sealant jobs are priced and what customers say.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to a full day, depending on how many windows. A visit to Rudmore is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
- Clear items away from the joints we are working on
Get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.