Portsmouth · England
Paulsgrove Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Paulsgrove. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Sand mastic for homes and businesses in Paulsgrove
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We work on timber door frames, period & listed homes and stone surrounds, and the jobs we see most are old cement repairs round a window that have failed and mastic dropping out of the joint.
Around Paulsgrove, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
Your job is guaranteed for a year, as with all our work.
- Where
- Paulsgrove (PO6)
- Region
- Portsmouth
- Cover
- A year, on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Paulsgrove
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How the visit works
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before any work starts. The work usually takes a few hours for a single window, longer for several. For a job in Paulsgrove, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Ask for a quote
We quote each job on its own. Just phone 0345 464 0079 or send us an email with the details and send photos if you have them.
Advice
Common problems we fix in Paulsgrove
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Look out for any of the following:
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
- Draughty sash windows at the surround
- Mastic that needs renewing before redecorating
If you look after a building such as Beacon View Primary Academy, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Whether you can choose the colour
- What happens if they find a problem under the old sealant
- What product goes in the joint
- When the joint can take water or movement
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
For anyone letting property in or around Paulsgrove, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Can I do it myself?
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.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Your questions about sand mastic in Paulsgrove
Is sand mastic in a coastal place like Paulsgrove any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Paulsgrove?
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.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will tell you what we are using.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Can sand mastic be painted?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Paulsgrove homes and the weather
Paulsgrove 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. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St Michael and All Angels, the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Cosham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Paulsgrove is about 3 miles north of Portsmouth, in Portsmouth. Jobs in Paulsgrove get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Paulsgrove is one of 19 places in Portsmouth where we work for sand mastic.
Work in PO6 works the same way as everywhere else we cover. Local streets include Bourne Road, Ludlow Road and Farmlea Road, and we cover them all. Main roads around Paulsgrove include the M27 and A27. We also cover Wymering (1 mile east), Cosham (1 mile east), Hilsea (2 miles south-east), Widley (2 miles east) and Purbrook Heath (2 miles north-east). Within a short drive, we also cover Portsmouth (3 miles south), Southsea (5 miles south), Milton (4 miles south), Landport (3 miles south), Baffins (3 miles south-east) and Portsea (4 miles south).
What’s near Paulsgrove
In Paulsgrove, that means homes and buildings near Alexandra Park, The Sir Alec Rose pub and Castle View Academy and the streets around them. Paulsgrove’s nearest station is Cosham station, roughly 1.2 miles south-east. Nearby you will also find Queen Alexandra Hospital (1.1 miles east) and World War I Remembrance Centre (2.2 miles south-east). The countryside around Paulsgrove includes Southmoor Nature Reserve and Portsdown Hill.
What affects the quote in Paulsgrove
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- Any mould that needs treating
- Whether the work is at height
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
Helping us quote
Before you ask for a quote, have a think about:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- The address or postcode of the job
- The rough size of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Ask us before painting near the mastic
- Do not run silicone over sand mastic
- Check the mastic when you check the paintwork
- Find out about consent before window work on a listed home
Avoid painting over the new mastic, as traditional guidance advises. If you are redecorating, ask us first.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.