Hampshire · England
Window & door mastic in Steep, Hampshire
We cover Steep for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Sealant in the wrong colour for the frame
- Untidy mastic left by window fitters
- Draughty joints inside around the window
When something else is needed
We’d rather tell you now than do work that will not last, so these are the limits:
- Worn gaskets, brush seals or a door that has dropped
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Window sills
- Composite doors
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
About our window mastic in Steep
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We’re often asked to deal with sealant in the wrong colour for the frame and gaps where the sill meets the wall, on uPVC windows, patio & French doors and window sills.
In a village or hamlet like Steep, 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.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Steep (GU32)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Steep: your questions answered
Will you come out to Steep?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
I let a flat near Petersfield station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
How long should I leave it?
It depends on the product. We tell you how long to leave it before we go.
Where are you based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly.
How do I get a quote for window mastic in Steep?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or drop us an email with a short description of the job.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Keep paint off silicone joints
- Avoid blasting the frames with a pressure washer
- Keep paint and stain on wooden frames in good order
- Use gentle cleaners on frames and sealant
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Places near Steep
Also in Steep
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
What window mastic looks like in Steep
London and the South East are among the drier parts 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 Steep Church of England Voluntary Controlled Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Steep is about 1 mile north of Petersfield, in Hampshire. Whether you’re in the middle of Steep or further out, we cover window mastic for every kind of property. Our area takes in 683 places across Hampshire, from the larger towns to small villages. You can also see our page for Portsmouth, roughly 16 miles from Steep.
Every address in GU32 is covered for window mastic. Window mastic is available to properties on Church Road and Mill Lane. We also cover the places around Steep: Steep Marsh (1 mile north), Sheet (1 mile south-east), Oakshott (1 mile north), Petersfield (1 mile south) and Stroud (2 miles south-west). Further out, we also cover Havant (11 miles south), Horndean (9 miles south), Alton (9 miles north), Waterlooville (11 miles south), Purbrook (12 miles south) and Bordon (7 miles north-east).
What’s near Steep
Locally, jobs take us to homes and businesses close to The Cricketers Inn, Churcher's College and The Petersfield School. Steep’s nearest station is Petersfield station, roughly 1.4 miles south. Well-known places in the area include Bear Museum (1.7 miles south) and Petersfield Community Hospital (1.5 miles south). For a walk, there’s Liss Riverside Railway Walk South and Wheatham Hill.
Leave it or put it right?
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly. Around Steep, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why book with us
- We leave the area clean and tidy
- An ARBOMaster approved applicator
- A sealant colour to suit the surroundings
- We never seal over old sealant
Read how sealant jobs are priced and our reviews.
How it works
When we get to you, 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 few hours for a few frames, or a day or more for a whole house. Somewhere like Steep needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
- Mention if the joints have been sealed before
Ask for a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Advice
How the job changes by surface
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we will tell you before going ahead, as that is a job for a joiner.
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the new bead is laid against the frame and the wall.
Common problems we fix in Steep
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Common reasons people contact us include:
- Mastic that’s falling out in pieces
- Hard, cracked sealant around windows
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
If you let a flat or house near Petersfield station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
What to look for in a quote
- How hidden problems are handled
- Which sealant they’ll use, and why
- The length of the guarantee
- How the colour is chosen