Hampshire · England
Window Mastic in Liss
Mastic around window and door frames, sills and patio doors for homes and businesses in Liss and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between the frame and the inside reveal
- Cracked sealant at the sill ends
- Mastic that is falling out in pieces
Window mastic in Liss, done properly
Around Liss we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you’re dealing with cracked or shrunken mastic around the frame and a bead that doesn’t match the frame, we can help, whatever the surface.
Around Liss, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
You’re covered for a year from the day we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Location
- Liss (GU33)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for window mastic
We don’t publish a price list, because no two jobs are the same. What we look at:
- The type of sealant required
- How easy the joints are to reach
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
A few things move the cost up or down: 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 to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Any previous sealing or DIY work
- How we’d reach the joints
- Where the job is, and your postcode
- Whether it’s a home or a business
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that’s easy.
Aftercare tips
A little care helps the new joints last. We recommend:
- Wash the frames with mild soapy water
- Keep solvents and bleach off the sealant
- Keep jet washers away from the mastic
- Do not paint over the silicone
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just call 0345 464 0079 or email us.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
Do you need window mastic in Liss?
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
The problems people usually mention when they call are:
- Sealant in the wrong colour for the frame
- Leaking joints at the ends of sills
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
For landlords with property near Liss station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before you book anyone
- Which sealant they’ll use, and why
- Which colour the sealant will be
- When the joint can take water or movement
- Who does the work, and how experienced they are
What else we do in Liss
Surface by surface
Composite doors
An exposed front door gets wind-driven rain, and the top and bottom corners tend to fail first. We pay most attention there.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
Window mastic in Liss: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you look after a building such as Liss Infant School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Liss is about 3 miles north-east of Petersfield, in Hampshire. We provide window mastic to homeowners, landlords and businesses in Liss and the surrounding area. Liss is one of 683 towns and villages in Hampshire where we work for window mastic. Our Portsmouth page covers work nearby, about 18 miles away.
We work across the GU33 postcode area for window mastic. Streets in the area include Station Road, Shotterfield Terrace and Greenfields, all of which we cover. Other places close to Liss include West Liss (1 mile south-west), The Mint (1 mile north-east), Liss Forest (1 mile north), Hill Brow (1 mile south-east) and Durford Wood (1 mile south). Larger places within reach include Havant (13 miles south), Horndean (11 miles south-west), Aldershot (15 miles north), Alton (8 miles north-west), Waterlooville (13 miles south-west) and Petersfield (3 miles south-west).
What’s near Liss
We work in homes and buildings around Whistle Stop pub and the streets around them. Liss has its own railway station: Liss station. Other landmarks nearby include Petersfield Community Hospital (3.6 miles south-west) and Bear Museum (3.5 miles south-west). For a walk, there’s Liss Riverside Railway Walk South and Wheatham Hill.
When it is not the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Damp coming through the wall itself rather than the frame joint
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Timber windows & doors
- Composite doors
- Aluminium frames
- uPVC windows
- Window sills
- Patio & French doors
How the visit works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a morning for a couple of windows and a door. For a job in Liss, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear price before any work starts.
Advice
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Liss: your questions answered
Is Liss within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Liss station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can you match the sealant to my frames?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Where do you work from?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
How much does window mastic cost in Liss?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Do you have insurance?
Yes, we’re fully insured for every job we do.
Can you reach windows above the ground floor?
Yes, in most cases. Access is planned before work begins, so mention the height and anything in the way.