Hampshire · England
Knapp New Build Mastic
Problem with your new-build sealant joints in Knapp? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Worktop and upstand sealant coming away
- Plot mastic for developers ahead of handover
- Leaking shower tray seals in a new home
New build mastic in Knapp, done properly
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. If you have untidy sealant flagged on a snagging list and gaps between new skirting and floors, we can put it right.
Work in a small place like Knapp just needs the journey and access planning, and the work itself is the same as on any site.
Whatever the size of the job, you get the same one-year guarantee in Knapp and across Hampshire.
- Where
- Knapp (SO51)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Joints and finishes in Knapp homes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Chandlers Ford station, the sealant around baths, showers and frames is worth checking in the first year or two.
Knapp is about 2 miles north-west of Chandler's Ford, in Hampshire. Jobs in Knapp get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 683 places across Hampshire, from the larger towns to small villages. Southampton is on our list too, around 7 miles away.
Jobs for new build mastic in SO51 works the same way as everywhere else we cover. Close by, we work in Ampfield (1 mile south-west), Broadgate (1 mile south-east), Gosport (1 mile south-west), Lower Slackstead (1 mile north-west) and Crampmoor (2 miles south-west). Within a short drive, we also cover Winchester (6 miles north-east), Eastleigh (5 miles south-east), Fareham (15 miles south-east), Andover (14 miles north), Totton (7 miles south-west) and Hedge End (8 miles south-east).
Around Knapp
We work in homes and buildings around White Horse Public House. For rail, the closest station is Chandlers Ford station, about 2.5 miles south-east. A little further out are Romsey Community Hospital (2.9 miles south-west) and King Johns House (3.7 miles south-west). The countryside around Knapp includes Emer Bog and Baddesley Common.
Do you need new build mastic in Knapp?
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracked sealant shows up.
The most common problems we see are:
- Smeared, uneven beads picked up at snagging
- Skirting joints opening in the first winter
- Worktop and upstand sealant coming away
- Internal frame sealant that has split
Around Knapp, as everywhere, new build mastic is only as good as the preparation behind it.
Questions to ask before you book
- Whether the sealant suits the joint
- Is VAT in the price?
- The length of the guarantee
- How hidden problems are handled
How the job changes by surface
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and prime where the product needs it.
Why it’s worth doing now in Knapp
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote to plan around. Around Knapp, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or email us for an honest opinion and a quote.
Why us?
- Neat joints and a tidy finish
- An ARBOMaster approved applicator
- Old sealant always removed completely
- We’re fully insured
See our cost guide and customer reviews.
What affects the quote in Knapp
Your quote is based on your job. We look at:
- The old material and how stubborn it is
- The product the joint needs
- Any working-time requirements on site
- The number and length of the joints
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Whether it has been sealed before
- The type of property
- The problem you’ve noticed
- Pictures of the joints, sent by email
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- Movement caused by a poorly fitted tray or bath
- Cracking that points to a structural problem
- Leaking fittings rather than failed sealant
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in Knapp
- Show homes
- Plot handovers
- Windows & doors
- Bathrooms & en suites
- Skirting & floors
- Kitchens
Landlords, agents and businesses in Knapp
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.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Questions from Knapp
Can you help a landlord with a rental near Chandlers Ford station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can you do new build mastic in Knapp?
Yes, Knapp is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Will the old sealant be removed?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Where are you based?
We work from Crawley. We cover Knapp and the rest of Hampshire, along with the rest of our area.
What does new build mastic cost?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or email us with a short description of the job.
How long before the joint can be used?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Towns and villages near Knapp
Other services in Knapp
How it works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for most snagging lists, longer for a run of plots. For a village or hamlet like Knapp, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked for movement before any work starts.
- 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.
- We check every joint and leave you with the cure times.
Preparing for the visit
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job.