Hampshire · England
Window & door mastic in Rowlands Castle, Hampshire
Mastic around window and door frames, sills and patio doors in Rowlands Castle, with a one-year guarantee on every job. Call for a quick quote.
- Draughts coming in around windows and doors
- Cracked sealant at the sill ends
- Gaps left after new windows were fitted
For landlords and businesses
We work for landlords and letting agents as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Window mastic in Rowlands Castle
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We work on timber windows & doors, aluminium frames and uPVC windows, and people most often call us about damp patches on the reveal after heavy rain and black, perished sealant on frames.
Homes around Rowlands Castle range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
All of our work is guaranteed for twelve months, in Rowlands Castle and everywhere else we cover.
- Where
- Rowlands Castle (PO9)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
The work is quick compared with the damage it prevents: the visit takes a morning for a couple of windows and a door. Wait for damp to appear and there may be plaster and decorating to sort out too. Around Rowlands Castle, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Why choose Mr Mastic in Rowlands Castle
- Every job guaranteed for a year
- Domestic, commercial and hotel work
- White, clear, grey or another colour, product permitting
- Fully insured
Take a look at how sealant jobs are priced or what customers say.
How the visit works
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the job takes a few hours for a handful of frames, longer for a whole house for a typical job. For a job in Rowlands Castle, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
- Mention any parking rules near the property
Ask for a quote
For window mastic in Rowlands Castle, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
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What affects the cost of window mastic
There’s no set price list, because jobs vary so much. What we look at:
- The type of sealant required
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
Every job is a little different, so each one gets its own quote. 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.
Helping us quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- The rough size of the job
- Any previous sealing or DIY work
- A few photos by email, if you can
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or send us an email.
DIY sealant or a professional job?
Some jobs are best left to a professional: 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 does not work out, we can still put it right.
FAQs for Rowlands Castle
Does living near the coast affect window mastic in Rowlands Castle?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
I let a flat near Rowlands Castle station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Is the new sealant paintable?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Mention any painting plans before work begins.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
How many windows can you do in a day?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and the amount of old mastic make the biggest difference.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Can you match the sealant to my frames?
Usually, yes. Mention the frame colour when you ask for a quote and we will match it as closely as we can.
Windows and doors in Rowlands Castle
Rowlands Castle is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. 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.
Rented homes near Rowlands Castle station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near The Church on the Green, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Havant Academy? Then the mastic around its windows and doors needs looking after like any other building’s.
Rowlands Castle is about 2 miles north-east of Havant, in Hampshire. Anywhere in PO9, we cover window mastic for homes and businesses. 683 places in Hampshire are on our list. Portsmouth is on our list too, around 7 miles away.
Postcode districts we cover here for window mastic: PO9. Local streets include Stansted Close, College Close and Redhill Road. Other places close to Rowlands Castle include Durrants (1 mile south), Leigh Park (2 miles south-west), Havant (2 miles south-west), Denvilles (2 miles south) and Westbourne (2 miles south-east). Larger places within reach include Gosport (10 miles south-west), Fareham (10 miles west), Hedge End (15 miles west), Waterlooville (3 miles west), Petersfield (8 miles north) and Purbrook (3 miles south-west).
What’s near Rowlands Castle
Around Rowlands Castle, our work takes us to homes and buildings near Robin Hood Inn. Rowlands Castle has its own railway station: Rowlands Castle station. Nearby you will also find Havant War Memorial Hospital (2.6 miles south-west) and Havant Museum (2.7 miles south). Open spaces near Rowlands Castle include Compton Down and Brook Meadow (Emsworth).
Nearby places to Rowlands Castle
Also in Rowlands Castle
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Air rooms to keep condensation down around windows
- Avoid blasting the frames with a pressure washer
- Keep drainage slots and sill grooves clear
- Check the mastic once a year
Check the drainage slots in the frames are not blocked, so water can run away instead of sitting against the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.