Hampshire · England
Sand Mastic in Crampmoor
Sand mastic for Crampmoor, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Patchy fillers round a sash window
- Draughty sash windows at the surround
- Open joints round the window box
Sand mastic in Crampmoor: local notes
With historic houses such as Mottisfont Abbey (about 4.4 miles north-west) nearby, there’s older building stock in the area around Crampmoor as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Romsey station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about. If you live in an older home near St Swithun's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Crampmoor is about 1 mile north-east of Romsey, in Hampshire. We carry out sand mastic for homes and businesses in Crampmoor. Our Hampshire coverage runs to 683 places, Crampmoor among them. We also work in Southampton, around 6 miles away.
Every address in SO51 is covered for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on The Straight Mile and Crampmoor Lane or anywhere close by, our applicators can take on the job. Neighbouring places we cover for sand mastic include Gosport (1 mile east), Ampfield (1 mile east), Abbotswood (1 mile west), Braishfield (1 mile north) and Knapp (2 miles north-east). Further out, we also cover Winchester (7 miles north-east), Eastleigh (5 miles south-east), Fareham (15 miles south-east), Andover (14 miles north), Totton (6 miles south) and Chandler's Ford (3 miles south-east).
Local landmarks in Crampmoor
Around Crampmoor, our work takes us to homes and buildings near The Mountbatten School and Hunters Inn Public House, among other places. The closest station to Crampmoor is Romsey station, roughly 1.8 miles south-west of the centre. Nearby you will also find Romsey Community Hospital (1.4 miles south-west) and King Johns House (2.2 miles south-west). Not far away are Emer Bog and Baddesley Common.
Sand mastic in Crampmoor
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. Common call-outs are for window mastic to renew ahead of painting and cement or filler used on old window joints that has cracked, on timber door frames, brick reveals and tenement windows.
Somewhere as small as Crampmoor, 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.
All of our work is guaranteed for twelve months.
- Location
- Crampmoor (SO51)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Avoid heavy scraping on the mastic joint
- Check the mastic when you check the paintwork
- Leave the new mastic unpainted
- Plan mastic work ahead of painting
Leave the new mastic alone while it firms up. It forms a skin fairly soon, but takes longer to harden fully.
Good mastic helps keep the frame dry. Once it fails, water can sit against the timber and timber that stays wet can rot.
Landlords, agents and businesses in Crampmoor
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Crampmoor: your questions answered
Can you do sand mastic in Crampmoor?
Yes. Our work covers London and the South East, and Crampmoor is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear quote.
I let a flat near Romsey station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
How long does the job take?
That depends on the amount of work, but most jobs take a few hours for a single window, longer for several. We’ll give you a better idea when we quote.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames usually get a flexible sealant.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we will advise.
Surface by surface
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Signs you need sand mastic in Crampmoor
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
The most common problems we see are:
- Silicone on a period window that looks wrong
- Draughts and rain around sash boxes
- Mastic round period door frames that has failed
- Old sand mastic that has cracked, crumbled or fallen out
Schools such as Cupernham Infant School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- When the joint can take water or movement
- Which colour the sealant will be
- Who turns up on the day
- Whether the sealant suits the joint
Why it’s worth doing now in Crampmoor
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall so renewing it early protects the window. In a small place like Crampmoor, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Crampmoor clients choose us
- Arbo and Everbuild products
- Old sealant always removed completely
- 20+ years of sealant experience
- Every job guaranteed for a year
Places near Crampmoor
Also in Crampmoor
What we cannot put right
We will always be straight with you, so here’s what sealant can’t fix:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Damaged stone surrounds
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Tenement windows
- Brick reveals
What happens on the day
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for a single window, longer for several. Somewhere as small as Crampmoor, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about parking restrictions
- For business premises, tell us about site rules or sign-in
How to get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.