Kent · England
Sand mastic for sash & case windows in St Peter's, Kent
Specialist sand mastic for St Peter's: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Modern sealant on a period surround
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
About our sand mastic in St Peter's
Sand mastic skins over fairly quickly but full hardening takes longer. Traditional guidance is not to paint over it, so ask us before you decorate. If you are dealing with draughts and rain around sash boxes and failed mastic on an exposed elevation, we can put it right, on tenement windows, brick reveals and sash and case windows alike.
Around St Peter's, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
A one-year guarantee comes as standard.
- Place
- St Peter's (CT10)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
DIY sealant or a professional job?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Nearby places to St Peter's
What else we do in St Peter's
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- Masonry that needs repairing
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Tenement windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Sash and case windows
- Brick reveals
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Plan mastic work ahead of painting
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water does not pour onto the windows
- Do not run silicone over sand mastic
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
How it works
On the day, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for a single window, longer for several. A visit to St Peter's is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved.
Advice
How we quote for sand mastic
The quote reflects the job in front of us. We look at:
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Mould in or behind the old joints
- The number of rooms or windows
What you pay reflects the work, not guesswork. That is why we ask about the job first.
Asking for a quote
Before you ask for a quote, have a think about:
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- A few pictures by email, if you can
- Whether it’s a home or a business
Every job is quoted individually, so the first step is telling us about yours. Just phone 0345 464 0079 or send us an email with the details, and photos are welcome.
Frames and glazing around St Peter's
St Peter's 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 older windows and doors, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Dane Court Grammar School, the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Parish Church of St Peter the Apostle, the joint between an old wall and a newer frame is normally the first place rain gets in.
St Peter's is about 1 mile north-west of Broadstairs, in Kent. Every kind of property in St Peter's can book us for sand mastic. The work is guaranteed for a year. Across Kent, we cover 922 places, and St Peter's is one of them. Our Chelmsford page covers work nearby, about 48 miles away.
We cover every part of the CT10 postcode area for sand mastic. You’ll find streets such as Upton Road, Green Lane and Speke Road. St Peter's sits on or near the A255. Other places close to St Peter's include Broadstairs (1 mile south-east), Upton (1 mile south-east), Northwood (1 mile south-west), Northdown (1 mile north) and Kingsgate (2 miles north-east). We also work in nearby towns such as Deal (10 miles south), Herne Bay (12 miles west), Walmer (11 miles south), Whitfield (15 miles south), Sandwich (7 miles south-west) and Aylesham (13 miles south-west).
Around St Peter's
We work in homes and buildings around Red Lion pub, Callis Grange Nursery and Infant School and The Charles Dickens School and the streets around them. For rail, the closest station is Broadstairs station, about 0.7 miles south-east. Nearby you’ll also find Crampton Tower (0.7 miles south-east) and Queen Elizabeth the Queen Mother Hospital (1.5 miles north-west). Not far away are Sandwich and Pegwell Bay.
Do you need sand mastic in St Peter's?
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint, and they normally need raking out.
People usually contact us after spotting one of these:
- Old cement repairs round a window that have failed
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
Letting a property close to Broadstairs station? Then any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Whether they’re fully insured
- The length of the guarantee
- How the surfaces are prepared before sealing
- Whether all the old sealant comes out first
Common questions in St Peter's
Is St Peter's within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect sand mastic in St Peter's?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are normally the first to need attention.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do you have insurance?
Yes. Full insurance covers our work.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Should I use sand mastic or silicone?
We’ll help you decide. Period homes often look best with sand mastic, and modern sealants suit newer frames.
How long will you be here?
Most jobs take a few hours per window, depending on the condition of the joints, including preparation and clearing up. We will confirm how long when we quote.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.