Hampshire · England
Window & door mastic in Petersfield, Hampshire
Problem with your window and door frames in Petersfield? We cut out the old, prepare the joints and apply the right sealant.
- Rushed sealant from a window installation
- Cracked internal joints between frame and plaster
- Whistling draughts around closed windows
Why it’s worth doing now in Petersfield
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. In a family home in Petersfield, a failed seal around a bath or a frame lets water into places you can’t see, like the floor under a bath, the back of a panel or the inside of a wall. Whatever the joint, failed sealant only gets worse.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What you get with us
- A 12-month guarantee on all work
- Full insurance on every job
- Sealant colour chosen to suit
- More than 20 years in sealant work
Read what affects the cost and our reviews.
Window mastic for homes and businesses in Petersfield
A cold draught around a closed window often comes from the frame edge. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we’ll say so. If you are dealing with cracked sealant at the sill ends and gaps between the frame and the inside reveal, we can put it right, on composite doors, patio & French doors and uPVC windows alike.
Walls in Petersfield that face the prevailing wind take the most weather, so the mastic there tends to fail first. It’s worth looking at every frame, not just the one that leaks.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Petersfield (GU31, GU32)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Petersfield homes and the weather
Historic houses like Uppark (about 4.1 miles south-east) are a reminder that the area around Petersfield has older buildings as well as new. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
In the older streets around St Peter's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Petersfield station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Petersfield is about 10 miles north of Havant, in Hampshire. Whether you are in the middle of Petersfield or further out, window mastic is available for homes and businesses alike. Our area takes in 683 places across Hampshire, large and small. We also work in Portsmouth, about 15 miles from Petersfield.
Jobs for window mastic in GU31 and GU32 works the same way as everywhere else we cover. Whether your property is on High Street, Station Road and London Road or anywhere close by, we can help. With the A3 and A272 close by, Petersfield is easy for our applicators to reach for window mastic. We also cover the places around Petersfield: Sheet (1 mile north-east), Steep (1 mile north), Stroud (2 miles west), Steep Marsh (2 miles north) and Langrish (3 miles west). Larger places within reach include Havant (10 miles south), Horndean (7 miles south-west), Alton (10 miles north), Waterlooville (9 miles south-west), Purbrook (10 miles south-west) and Bordon (8 miles north-east).
What’s near Petersfield
In Petersfield, that means homes and buildings near The Petersfield School, The White Hart pub and Morton House School, among other places. Petersfield has its own railway station: Petersfield station. A little further out are Bear Museum (within half a mile south) and Petersfield Community Hospital (less than half a mile west). The countryside around Petersfield includes Wheatham Hill and Liss Riverside Railway Walk South.
Questions from Petersfield
Is there a guarantee on window mastic in Petersfield?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
I let a flat near Petersfield station. Can you help?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Ventilation helps.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Where are you based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us.
Do you seal inside as well as outside?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Do you have sealant for grey or black windows?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Also in Petersfield
What sealant work can’t fix
Sealant is not the answer to every problem, and we’ll tell you before we start. It will not solve:
- A frame that has rotted at the joint
- A sash or casement that won’t close properly
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Aluminium frames
- Patio & French doors
- Window sills
- Composite doors
- uPVC windows
- Timber windows & doors
What we do, step by step
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours for a handful of frames, longer for a whole house for a typical job. Parking in a town like Petersfield is usually straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
What affects the quote in Petersfield
Your quote is based on your job. We take into account:
- The old material and how stubborn it is
- The product the joint needs
- Working hours on commercial sites
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Any access issues, like height or stairs
- The rough size of the job
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
Every job is quoted individually. Simply ring 0345 464 0079 or drop us an email and describe the job.
Signs you need window mastic in Petersfield
Mastic ages in the weather. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Most people get in touch after spotting something like this:
- Mastic that’s falling out in pieces
- Cracked sealant at the sill ends
- A bead that does not match the frame
- Draughts coming in around windows and doors
Managing a site like Petersfield Infant School? Then the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- Which colour the sealant will be
- Who turns up on the day
- What happens if they find a problem under the old sealant
- Is VAT in the price?
Aftercare tips
So the new joints stay in good condition:
- Keep drainage slots and sill grooves clear
- Keep jet washers away from the mastic
- Avoid harsh chemicals near the mastic
- Wash the frames with mild soapy water
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.