Hampshire · England
Window & door mastic in Upper Street, Hampshire
Our applicators work in Upper Street on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Sealant in the wrong colour for the frame
- Water coming in at the bottom corners of a door
- Gaps left after new windows were fitted
Window mastic for homes and businesses in Upper Street
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We’re often asked to deal with sealant in the wrong colour for the frame and mastic that has split away from the wall, on patio & French doors, timber windows & doors and uPVC windows.
Somewhere as small as Upper Street, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Upper Street (SP6)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What window mastic looks like in Upper Street
Historic houses like Breamore House (about 0.5 miles north-east) are a reminder that the area around Upper Street has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Breamore Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Upper Street is in Hampshire. Anywhere in SP6, we cover window mastic for homes and businesses. 683 places in Hampshire are on our list, from the larger towns to small villages. We also work in Southampton, around 18 miles away.
We cover every part of the SP6 postcode area for window mastic. Close by, we work in Breamore (1 mile south-east), Upper Burgate (1 mile south), Woodgreen (2 miles east), Lower Burgate (2 miles south) and Tinkers Cross (2 miles south). Within a short drive, we also cover Totton (13 miles east), Romsey (14 miles east), Ringwood (8 miles south), Ashley (15 miles south-east), North Baddesley (15 miles east) and St Leonards (10 miles south).
Near you in Upper Street
We work in homes and buildings around Bat and Ball pub and The Burgate School and Sixth Form, among other places. A little further out are Fordingbridge Museum (2.5 miles south) and Salisbury District Hospital (5.5 miles north).
Why act early in Upper Street
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. In a small place like Upper Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
Why Upper Street clients choose us
- A 12-month guarantee on all work
- Domestic, commercial and hotel work
- An ARBOMaster approved applicator
- Neat joints and a tidy finish
See our cost guide or what customers say.
Questions from Upper Street
Do you cover Upper Street for window mastic?
Yes, Upper Street is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear quote.
Will you come out to Upper Street?
Yes, we do. 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.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you work for letting agents?
Yes. As well as householders, we work for landlords, agents, businesses and hotels in Upper Street.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Do you have sealant for grey or black windows?
Yes, in most cases. Mention the frame colour when you ask for a quote and we’ll match it as closely as we can.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Worn gaskets, brush seals or a door that has dropped
- A failed sealed unit that has misted up
- Penetrating damp from a failed cavity tray or render
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Timber windows & doors
- uPVC windows
- Composite doors
- Patio & French doors
- Aluminium frames
- Window sills
For landlords and businesses
Landlords and letting agents in Upper Street can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Housing providers, facilities teams and property managers book us too in Upper Street and across Hampshire. We can quote a run of properties together, and we are fully insured for the work.
Towns and villages near Upper Street
More services for Upper Street
Different surfaces, different methods
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it, where a rigid one would crack.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Paint up to the joint, not over it
- Keep drainage slots and sill grooves clear
- Do not use solvent cleaners on the joint
- Wipe condensation off the frames
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just phone 0345 464 0079 or send us an email.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
The process
Before we leave, we go over the finished joints with you. The visit itself normally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the size of the job. In a small place like Upper Street, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- For indoor joints, keep the area dry beforehand if you can
- Tell us if parking is tricky
How to get a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or drop us an email.
Advice
Do you need window mastic in Upper Street?
Sun, frost and rain wear sealant out. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Keep an eye out for these signs:
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Rain getting in at the frame or under the sill
- Mastic that has split away from the wall
In the older streets around Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- What the cure time is
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- What happens if the job turns out different