Hampshire · England
Longmoor Sand Mastic
Professional sand mastic in and around Longmoor, with old sealant always removed completely and a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Silicone on a period window that looks wrong
- Gaps round a timber door in stone or brick
Why it’s worth doing now in Longmoor
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Where a wall is exposed, as many are in small places like Longmoor, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why book with us
- Fully insured
- Approved under the ARBOMaster scheme
- Tidy, careful work
- A 12-month guarantee on all work
Take a look at what affects the cost and customer reviews.
Sand mastic for homes and businesses in Longmoor
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. If you are dealing with cement or filler used on old window joints that has cracked and wind and rain getting in round a sash window, we can put it right.
In a village or hamlet like Longmoor, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Every job is covered by a one-year guarantee, wherever you are in Hampshire.
- Location
- Longmoor (GU33)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Longmoor
Do you cover Longmoor for sand mastic?
Yes. We work across London and the South East, and Longmoor is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Will you come out to Longmoor?
Yes, Longmoor is covered. 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.
What information do you need?
A short description and the location, with pictures by email if possible. If we need more, we will ask.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They decide whether consent is needed.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. Timing depends on the weather and the joint.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. Somewhere as small as Longmoor, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
Ask for a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before we start.
Advice
Nearby places to Longmoor
More services for Longmoor
Common problems we fix in Longmoor
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
People generally contact us when they notice something like this:
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
If you let a flat or house near Liss station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Are they insured?
- Which colour the sealant will be
- How long the guarantee is
- What product goes in the joint
When it is not the sealant
We will always be straight with you, so here’s what sealant can’t fix:
- Sashes that rattle, stick or won’t open
- Rotten sashes, sills or window boxes (a joiner’s job)
- Putty and glazing repairs
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Brick reveals
- Tenement windows
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
How we quote for sand mastic
The price is agreed before any work begins. It’s based on:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- The amount of work
- Access and height
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. We take all of that into account in your quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- Whether it’s a home or a business
- The problem you’ve noticed
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
What the job involves on each surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is usually favoured.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
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.
Frames and glazing around Longmoor
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.
If you look after a building such as Greatham Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Longmoor is about 3 miles south of Bordon, in Hampshire. If you need sand mastic in Longmoor, it’s easy to get a quote: please phone 0345 464 0079 or email us. We’re based in Crawley and cover Hampshire. 683 places in Hampshire are on our list, from the larger towns to small villages. There’s also a page for Portsmouth, about 20 miles away.
Every address in GU33 is within our area for sand mastic. If you need sand mastic at a property on Woolmer Road, Roberts Road and Methuen Road or a nearby road, we can help. Neighbouring places we cover for sand mastic include Greatham (1 mile west), Woolmer (1 mile north-west), Liss Forest (2 miles south-west), The Mint (2 miles south) and Blackmoor (2 miles north-west). Further out, we also cover Havant (15 miles south), Fleet (14 miles north), Horndean (13 miles south-west), Aldershot (13 miles north), Alton (7 miles north-west) and Waterlooville (15 miles south-west).
Around Longmoor
The nearest railway station is Liss station, roughly 2.3 miles south-west of the centre. Nearby you’ll also find The Romany Museum (3.4 miles north-west) and Chase Community Hospital (2.3 miles north). Not far away are Wheeler's Down and Liss Riverside Railway Walk North.