Hampshire · England
Knowle New Build Mastic
Specialist new build mastic for Knowle: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Cracks appearing as a new home settles
- Cracked caulk along new skirting
- Kitchen sealant that has pulled off the wall
About our new build mastic in Knowle
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. If you are still within the builder’s snagging or warranty period, tell them first and if that stalls, we can do it. If you have messy sealant that spoils new finishes and skirting joints opening in the first winter, we can help.
Somewhere as small as Knowle, new homes tend to be conversions, self-builds or a few houses rather than an estate. Each still needs its sealant and floor joints finished properly.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Knowle (PO17)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Knowle
Is Knowle within the area you cover?
Yes, Knowle is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Fareham station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Where do you work from?
We are based in Crawley, and we work across South East England, London and Scotland.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we will quote it together.
What colour sealant will you use?
The colour is chosen to suit the tiles, worktop or frame. Let us know your preference when you ask for a quote.
Can I send you my snagging list?
Yes. Send us the sealant items on the list, with photos if you can. We will tell you if anything on it isn’t a sealant job.
Can I do it myself?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
New build mastic around Knowle
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Around Knowle, as everywhere, new build mastic is only as good as the preparation behind it.
Knowle is about 2 miles north of Fareham, in Hampshire. Every kind of property in Knowle can book us for new build mastic. Every job comes with our 12-month guarantee. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. Portsmouth is on our list too, about 7 miles from Knowle.
Every address in PO17 is within our area for new build mastic, from the main roads to the quietest streets. New build mastic is available to properties on Serotine Close, Boundary Walk and Park Approach. We also cover Funtley (1 mile south), Tapnage (1 mile north-west), Heathfield (2 miles south), Segensworth (2 miles west) and Titchfield Park (2 miles south-west). We also work in nearby towns such as Winchester (13 miles north), Gosport (6 miles south-east), Havant (10 miles east), Eastleigh (9 miles north-west), Horndean (9 miles east) and Totton (13 miles west).
Landmarks near Knowle
Typical jobs here are in homes near The Miners Arms and The Henry Cort Community College and the streets around them. The nearest railway station is Fareham station, about 2 miles south of the centre. Nearby you’ll also find Portchester Castle (4.9 miles south-east) and Knowle Hospital (under half a mile north-east). Open spaces near Knowle include Portsdown Hill and Swanwick Lakes.
What affects the quote in Knowle
There’s no set price list, because no two jobs are the same. What we look at:
- The amount of work
- Whether old sealant or filler has to be cut out
- The type of sealant required
- When we can work, for business premises
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- How many joints, rooms or windows are involved
- A few photos by email, if you can
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
For anyone letting property in or around Knowle, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
How it works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours in a single home from start to finish. Somewhere as small as Knowle, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely, with no layer left behind.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- Each bead is tooled and the cure times explained.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and send you a clear quote.
Advice
Leave it or put it right?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Where a wall is exposed, as many are in small places like Knowle, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- We never seal over old sealant
- Sanitary silicone with an anti-fungal additive in wet areas
- Approved under the ARBOMaster scheme
- A sealant colour to suit the surroundings
Different surfaces, different methods
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
Also in Knowle
Common problems we fix in Knowle
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart.
Most people get in touch when they notice something like this:
- Gaps behind new kitchen upstands
- Joints pulling apart as timber shrinks
- Skirting joints opening in the first winter
- Untidy sealant flagged on a snagging list
For new homes near Fareham station, it’s worth checking the sealant early, while snags are still fresh.
What to look for in a quote
- Who turns up on the day
- What guarantee comes with the work
- What product goes in the joint
- Whether you can choose the colour