Hampshire · England
Sway Sand Mastic
Sand mastic for Sway, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Weathered mastic on the most exposed windows
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
Sand mastic in Sway
Silicone on a period window often looks wrong and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on timber door frames, brick reveals and sash and case windows, and people most often call us about cement or filler used on old window joints that has cracked and gaps between timber frames and stone or brick.
In smaller places like Sway, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. The right sealant depends on the frame and on what it sits in.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Sway (SO41)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Looking after it afterwards
So the new joints stay in good condition:
- Inspect the joints round the windows every year or so
- Avoid patching sand mastic with silicone
- Check with your local planning authority if your home is listed
- Clear gutters so water does not pour onto the windows
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
Frames and glazing around Sway
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.
Homes close to St Luke's Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Sway station? Then any sash windows need sound mastic to keep draughts and rain out.
Sway is about 3 miles north-west of Lymington, in Hampshire. For sand mastic in and around Sway, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Hampshire from our Crawley base, Sway included. Sway is one of 683 towns and villages in Hampshire where we work for sand mastic. You can also see our page for Southampton, about 13 miles away.
Our applicators cover all of SO41 for sand mastic. Sand mastic is available to properties on Station Road, Anderwood Drive and Cruse Close and the roads around them. Other places close to Sway include Mead End (1 mile west), Tiptoe (1 mile south-west), Hordle (2 miles south), Ashley (2 miles south-west) and Bashley (2 miles west). Further out, we also cover Totton (10 miles north-east), Lymington (3 miles south-east), Romsey (15 miles north), Hythe (10 miles north-east), New Milton (3 miles south-west) and Ringwood (9 miles north-west).
Landmarks near Sway
We work in homes and buildings around Forest Heath Hotel, among other places. Sway has its own railway station: Sway station. Other landmarks nearby include Lymington New Forest Hospital (2.9 miles south-east) and Sammy Miller Motorcycle Museum (3.3 miles south-west). Green spaces nearby include Milford on Sea LNR.
What happens on the day
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, we protect the area and start. Most jobs take anything from a few hours to a full day, depending on how many windows. In a smaller place like Sway, 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.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any tricky access
- Move anything stored near the joints
- For business premises, tell us about site rules or sign-in
Getting a quote
For a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Advice
What affects the cost of sand mastic
You’ll get a clear quote before any work starts. It’s based on:
- How much there is to do
- The number of rooms or windows
- Access and height
- Which sealant suits the joint
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Asking for a quote
When you contact us, it’s useful to know:
- The problem you’ve noticed
- How we’d reach the joints
- Photos by email, if that’s easy
- Any previous sealing or DIY work
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or drop us an email.
How the job changes by surface
Sash and case windows
Sash windows are where we do most sand mastic work. Each joint round the box is raked out and renewed.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Also in Sway
Signs you need sand mastic in Sway
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
Common reasons people contact us are:
- Failed mastic on an exposed elevation
- Mastic round period door frames that has failed
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
Schools such as St Luke's Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- How the surfaces are prepared before sealing
- Are they insured?
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
What happens if it’s left?
New sash windows are a major, costly change and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Homes in smaller places like Sway can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why us?
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- More than 20 years in sealant work
- A 12-month guarantee on all work
See what affects the cost and our reviews.
Sway: your questions answered
I let a flat near Sway station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Do you cover smaller places like Sway?
Yes. Sway 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 are fully insured for every job we do.
Is the work guaranteed?
Our 12-month guarantee applies to all our work.
Can you match the sealant colour?
In most cases you can choose. We’ll explain which colours are available and agree one before work begins.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.