Portsmouth · England
Sand Mastic in Fratton
Sand mastic across Fratton and nearby, with old sealant always removed completely and a 12-month guarantee.
- Modern sealant on a period surround
- Tired mastic found when preparing windows for paint
- Gaps between timber frames and stone or brick
About our sand mastic in Fratton
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. Typical jobs include mastic dropping out of the joint and mastic worn away on windows facing the weather, on period & listed homes, brick reveals and timber door frames.
In a smaller place like Fratton, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
All of our work is guaranteed for twelve months.
- Location
- Fratton (PO1, PO4, PO3)
- Region
- Portsmouth
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Fratton: your questions answered
Do you cover smaller places like Fratton?
Yes, Fratton is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Fratton station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. We’ll ask anything else we need to know.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
How long does the job take?
Typically it takes a few hours for a single window, longer for several. Bigger jobs take longer, and we will tell you how long to expect.
How do I get a quote for sand mastic in Fratton?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Also in Fratton
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- How many areas need sealing
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What we need to know
To help us quote quickly, let us know:
- Whether it’s a home or a business
- Where the property is
- The rough size of the job
- Any previous sealing or DIY work
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before we start.
What we do, step by step
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 per window, depending on the condition of the joints. In a smaller place like Fratton, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Clear the area around the work
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
How to get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved.
Related advice
What the job involves on each surface
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we’ll confirm access.
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Landlords, agents and businesses in Fratton
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Landlords and agents in Fratton can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
When to call us in Fratton
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint and we normally remove them.
Any of these means the joints need attention:
- Gaps round a timber door in stone or brick
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
For landlords with property near Fratton station, any sash windows need sound mastic to keep draughts and rain out.
Comparing quotes
- Whether all the old sealant comes out first
- Is VAT in the price?
- What guarantee comes with the work
- How the colour is chosen
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you are 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 fails, we can still redo it.
What sand mastic looks like in Fratton
Fratton is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Penhale Infant School & Nursery? Then larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Fratton is about 1 mile south-east of Portsmouth, in Portsmouth. Wherever you are in the PO1 postcode area, we can carry out sand mastic at your property. We cover 19 towns and villages across Portsmouth.
Work in PO1, PO4 and PO3 is quoted and booked the same way as anywhere else. We cover properties on Renny Road, Clive Road and Union Road. Fratton is on the A288, so it’s easy for us to get to with everything needed for sand mastic. We also cover Kingston (1 mile north-east), Portsmouth (1 mile north-west), Landport (1 mile west), Baffins (1 mile north-east) and Copnor (1 mile north-east). Within a short drive, we also cover Wymering (3 miles north), Paulsgrove (3 miles north), Cosham (3 miles north), Drayton (3 miles north) and Farlington (4 miles north-east).
What’s near Fratton
Around Fratton, our work takes us to homes and buildings near The Portsmouth Academy, Alexandra Park and St Edmund's Catholic School, among other places. Fratton has its own railway station: Fratton station. A little further out are St Mary's Hospital (under half a mile east) and Charles Dickens Birthplace Museum (0.8 miles north-west). For a walk, there’s Milton Locks and Portsdown Hill.
What happens if it’s left?
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new work lasts. In an older home around Fratton, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
No two jobs are quite the same, so we quote each one individually. 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.
Why choose Mr Mastic in Fratton
- Any old sealant cut out fully, not covered over
- Approved under the ARBOMaster scheme
- Full insurance on every job
- 180+ five-star Google reviews