Hampshire · England
Knightwood New Build Mastic
We cover Knightwood for plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly.
- Internal frame sealant that has split
- Skirting joints opening in the first winter
- Shower seals failing in the first year or two
When something else is needed
In fairness, there are a few things sealant will not fix:
- Leaking fittings rather than failed sealant
- Broken tiles or a split tray
- Structural cracks in walls or ceilings
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before booking.
Where we work in Knightwood
- Skirting & floors
- Windows & doors
- Bathrooms & en suites
- Show homes
- Plot handovers
- Kitchens
How we handle new build mastic in Knightwood
Building dust is behind a lot of failed new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the new bead bonds properly. We work on show homes, bathrooms & en suites and windows & doors, and people most often call us about gaps behind new kitchen upstands and messy sealant that spoils new finishes.
Where new homes go up in smaller places like Knightwood, it’s often a small development or a single plot. Each still needs its sealant and floor joints finished properly from day one.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Knightwood (SO53, SO52)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Knightwood
Will you come out to Knightwood?
Yes. Knightwood is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you cover Knightwood for new build mastic?
Yes, Knightwood is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
Can new sealant go on top of the old bead?
No. Fresh silicone does not stick to the old layer, so sealing over the top fails quickly. We cut the old bead out completely.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Knightwood, along with the rest of our area.
Is the work guaranteed?
Yes. Every job comes with a one-year guarantee.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Surface by surface
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish. Tell us when the home is open so we can plan around it.
Kitchens
Worktops in new homes can move slightly as the house dries, opening gaps behind the upstand. We reseal them with a flexible sealant.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Act quickly if a seal starts to leak
- Open a window or run the fan after bathing
- Avoid scourers and strong chemicals on sealant
- Follow the cure time we give you
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day before water reaches them.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak over time.
Joints and finishes in Knightwood homes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For new homes near Chandlers Ford station, it’s worth checking the sealant early, while snags are still fresh.
Knightwood is about 1 mile west of Chandler's Ford, in Hampshire. Wherever you are in the SO53 postcode area, our applicators can take on new build mastic. Across Hampshire, we cover 683 places, and Knightwood is one of them.
Every address in SO53 and SO52 is covered for new build mastic. New build mastic is available to properties on Foyle Road, Harvest Road and Flexford Road. We also cover Chilworth Old Village (2 miles south-west), Chilworth (2 miles south), North Baddesley (2 miles west), Toothill (3 miles south-west) and Bassett (3 miles south). Further out, we also cover Winchester (6 miles north-east), Eastleigh (3 miles south-east), Fareham (13 miles south-east), Totton (7 miles south-west), Hedge End (7 miles south-east) and Romsey (4 miles west).
What’s near Knightwood
We work in homes and buildings around Toynbee School, among other places. The closest station to Knightwood is Chandlers Ford station, roughly 0.8 miles south-east of the centre. Well-known places in the area include Romsey Community Hospital (3.5 miles west) and Eastleigh Museum (2.5 miles south-east). Not far away are Flexford Nature Reserve.
When to call us in Knightwood
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
Most people get in touch when they notice something like this:
- Gaps between new skirting and floors
- Cracked sealant around new window and door frames
- Cracks appearing as a new home settles
- Untidy sealant flagged on a snagging list
Around Knightwood, as everywhere, new build mastic is only as good as the preparation behind it.
What to look for in a quote
- Are they insured?
- Which sealant they’ll use, and why
- When the joint can take water or movement
- How the colour is chosen
Towns and villages near Knightwood
More services for Knightwood
What happens on the day
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. Parking around Knightwood is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
Ask for a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Advice
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.