Hampshire · England
New-build mastic & snagging in South Harewood, Hampshire
New build mastic for South Harewood and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Frame joints opening as the plaster dries
- Joints pulling apart as timber shrinks
- Sealant work across a run of new homes
Do you need new build mastic in South Harewood?
A new house holds a lot of water from the build, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
Any of these means the joints need attention:
- Sealant applied over dusty or wet surfaces
- Worktop and upstand sealant coming away
- Gaps between new skirting and floors
- Joints pulling apart as timber shrinks
In and around South Harewood, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Questions to ask before you book
- How long the guarantee is
- Whether the sealant suits the joint
- How the colour is chosen
- How the joint is cleaned and prepared
How we handle new build mastic in South Harewood
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. If you’re still within the builder’s snagging or warranty period, tell them first. If you have skirting joints opening in the first winter and worktop and upstand sealant coming away, we can help, whatever the surface.
Somewhere as small as South Harewood, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
Each job carries a 12-month guarantee, large or small.
- Place
- South Harewood (SP11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near South Harewood
Also in South Harewood
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Wait for the cure time before using a resealed shower
- Photograph failed sealant before it’s redone
- Don’t wait for the house to settle if water is getting through
- Put sealant faults on your snagging list early
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers so moisture does not sit on the sealant.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and the new finishes intact.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How it works
At the end, we look at the finished work together. The work normally takes anything from a few hours to several days, depending on the number of plots, depending on the size of the job. Somewhere like South Harewood needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked for movement before we start.
- Old sealant is cut out and the joints cleaned.
- We make sure the joints are dry and prime them if needed.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
- On commercial sites, let us know about site rules
Ask for a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Related advice
New homes and floors in South Harewood
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For new homes near Andover station, it’s worth checking the sealant early, while snags are still fresh.
South Harewood is about 4 miles south-east of Andover, in Hampshire. Every kind of property in South Harewood is covered for new build mastic, old or new, large or small. The work is guaranteed for a year. South Harewood is one of 683 places in Hampshire where we work. Our Southampton page covers work nearby (18 miles or so).
Our applicators cover all of the SP11 postcode area for new build mastic. We also cover Wherwell (1 mile south-west), Wherwell Wood (2 miles west), Chilbolton (2 miles south-west), Cottonworth (2 miles south-west) and Fullerton (3 miles south-west). Further out, we also cover Basingstoke (15 miles north-east), Winchester (9 miles south-east), Eastleigh (15 miles south), Andover (4 miles north-west), Chandler's Ford (13 miles south) and Romsey (13 miles south).
Landmarks near South Harewood
The closest station to South Harewood is Andover station, roughly 4 miles north-west. Well-known places in the area include Andover War Memorial Hospital (4.3 miles north-west) and Finkley Down Farm Museum (3.5 miles north-west). Green spaces nearby include Mill Lake and Anton Lakes.
Work for landlords, hotels and businesses
If you manage several properties in or around South Harewood, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
Your questions about new build mastic in South Harewood
Do you work for landlords with property near Andover station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is South Harewood in your area for new build mastic?
Yes. We work across London and the South East, and South Harewood is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Are you fully insured?
Yes, we’re fully insured.
Is it normal for sealant to crack in a new home?
There are generally two causes: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Who should fix failed sealant in a new build?
Report it to the builder first while you’re covered. If it isn’t resolved, we can reseal it properly.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Why act early in South Harewood
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote for the lot. Where a wall is exposed, as many are in small places like South Harewood, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in South Harewood
- Anti-fungal silicone where joints get wet
- A sealant colour to suit the surroundings
- Homes, businesses and hotels
- We never seal over old sealant
Honest limits
We’ll always be straight with you, so here’s what sealant can’t fix:
- Baths and trays that move too much for sealant to cope with
- Leaks from pipes, valves or wastes, which need a plumber
- Settlement cracks that need a surveyor
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in South Harewood
- Show homes
- Windows & doors
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Kitchens