Hampshire · England
Window Mastic in Longmoor
Problem with your window and door frames in Longmoor? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Cracked or shrunken mastic around the frame
- Cracked internal joints between frame and plaster
- Draughts coming in around windows and doors
About our window mastic in Longmoor
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. If you have rain getting in at the frame or under the sill and mastic that has split away from the wall, we can help, whatever the surface.
Homes in small places like Longmoor often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Location
- Longmoor (GU33)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. In a small place like Longmoor, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
- 20+ years of sealant experience
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced or what customers say.
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes a morning for a couple of windows and a door from start to finish. In a small place like Longmoor, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Clear items away from the joints we are working on
- Let us know about earlier repairs to the joints
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
Related advice
How we quote for window mastic
Jobs vary more than people expect. What affects the quote:
- When we can work, for business premises
- The number and length of the joints
- The old material and how stubborn it is
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
To make quoting easier, let us know:
- The rough size of the job
- Any access issues, like height or stairs
- The address or postcode of the job
- Photos by email, if that’s easy
If you’re in Longmoor and need window mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Questions from Longmoor
Do you cover smaller places like Longmoor?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Liss station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Do you have insurance?
Yes. We’re fully insured.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme.
How many windows can you do in a day?
A few frames take a few hours. You will get a timescale with the quote.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Longmoor homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Greatham Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Longmoor is about 3 miles south of Bordon, in Hampshire. If you need window mastic in Longmoor, please phone 0345 464 0079 or email us for a quick quote. We cover Hampshire from our Crawley base, Longmoor included. Across Hampshire, we cover 683 places, Longmoor among them. There’s also a page for Portsmouth, roughly 20 miles from Longmoor.
Every address in GU33 is covered for window mastic. Streets in the area include Woolmer Road, Roberts Road and Methuen Road. Other places close to Longmoor 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).
Near you in Longmoor
Longmoor’s nearest station is Liss station, about 2.3 miles south-west of the centre. A little further out are The Romany Museum (3.4 miles north-west) and Chase Community Hospital (2.3 miles north). Green spaces nearby include Wheeler's Down and Liss Riverside Railway Walk North.
Honest limits
To be straight with you, some problems need a different trade:
- Damp coming through the wall itself rather than the frame joint
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Aluminium frames
- Composite doors
- Timber windows & doors
- Window sills
- Patio & French doors
- uPVC windows
Nearby places to Longmoor
Other services in Longmoor
Can I do it myself?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Signs you need window mastic in Longmoor
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. If the sealant cannot stretch, it splits.
These are the problems we are asked about most:
- Rushed sealant from a window installation
- Black, perished sealant on frames
- Cold air getting in at the frame edge
- Rain getting in at the frame or under the sill
For landlords with property near Liss station, renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- The length of the guarantee
- Whether they seal over old material or remove it
- How the colour is chosen
- How long to leave it before use
Different surfaces, different methods
Timber windows & doors
Soft or rotten wood can’t be sealed successfully. We’ll point out any rot we find, as a joiner will need to deal with it.
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.