Hampshire · England
Sand mastic for sash & case windows in Colbury, Hampshire
Sand mastic for Colbury, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Mastic round period door frames that has failed
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
Can I do it myself?
If you’re set on DIY, put the effort into 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.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Sand mastic in Colbury, done properly
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We are often asked to deal with crumbling sand mastic round a window and window mastic to renew ahead of painting, across stone surrounds, sash and case windows and brick reveals.
Somewhere as small as Colbury, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Colbury (SO40)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When to call us in Colbury
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
These are the problems we’re asked about most:
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
- Mastic round period door frames that has failed
Letting a property close to Ashurst New Forest station? Then any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- Is the old sealant removed completely?
- How long to leave it before use
- Are they insured?
- What guarantee comes with the work
Towns and villages near Colbury
What else we do in Colbury
Common questions in Colbury
Do you cover smaller places like Colbury?
Yes, Colbury is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Does living near the coast affect sand mastic in Colbury?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Do you work for landlords and businesses?
Yes, often. Several properties can be quoted together.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
Can sand mastic be painted?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Surface by surface
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or will not open
- Broken panes
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Sash and case windows
- Period & listed homes
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
Colbury homes and the weather
Colbury is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Southampton Tudor House and Garden (about 4.3 miles east) are a reminder that the area around Colbury has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Foxhills Infant School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. Homes close to Colbury Christ 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.
Colbury is about 1 mile south of Totton, in Hampshire. Colbury gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Hampshire coverage runs to 683 places, Colbury among them.
Here we cover the SO40 postcode area for sand mastic. Nearby, we also carry out sand mastic in Ashurst (1 mile west), Lyndhurst (4 miles south-west), Emery Down (4 miles south-west), Balmerlawn (6 miles south-west) and Brockenhurst (6 miles south-west). We also work in nearby towns such as Winchester (14 miles north-east), Eastleigh (8 miles north-east), Fareham (14 miles east), Chandler's Ford (8 miles north-east), Hedge End (9 miles east) and Lymington (10 miles south).
Landmarks near Colbury
In Colbury, that means homes and buildings near Hounsdown School and The Forest Inn. Colbury’s nearest station is Ashurst New Forest station, roughly 1.2 miles south-west. A little further out are Ashurst Hospital (1 mile south-west) and National Dairy Museum (within half a mile south). Open spaces near Colbury include Testwood Lakes.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Find out about consent before window work on a listed home
- Ask a joiner to look at soft timber first
- Ask us before painting near the mastic
- Sort the mastic before the decorators arrive
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
What we do, step by step
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. 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 small place like Colbury, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- On commercial sites, let us know about site rules
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, ring 0345 464 0079 or drop us an email.