Hampshire · England
New-build mastic & snagging in Steep, Hampshire
New-build sealant joints in Steep need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Second-fix sealing on new plots
- Cracked sealant around new window and door frames
- Messy sealant that spoils new finishes
Your questions about new build mastic in Steep
Is Steep in your area for new build mastic?
Yes. Our work covers London and the South East, and Steep is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
I let a flat near Petersfield station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Why does sealant fail so quickly in new builds?
A new house dries and settles for a year or two, and sealant is often rushed onto dusty, unprimed surfaces. Both lead to early failure.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you reseal over the builder’s sealant?
No. Sealing over old sealant looks fine for a few weeks, then lifts. All the old sealant comes out before work begins.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
About our new build mastic in Steep
We never seal over a failed new-build bead. New silicone will not bond to old silicone, so it all comes out before we clean, dry and reseal. Common call-outs are for shower seals failing in the first year or two and gaps between new skirting and floors, across plot handovers, kitchens and show homes.
Around Steep, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
All our work comes with our 12-month guarantee.
- Location
- Steep (GU32)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times to plan around. Where a wall is exposed, as many are in small places like Steep, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
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’ll explain the quote if you ask.
Why book with us
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
- Experience in homes, commercial sites and hotels
- Every job guaranteed for a year
Read what affects the cost and our reviews.
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Watch for new gaps as the house dries out
- Avoid running a DIY bead over the old one
- Put sealant faults on your snagging list early
- Follow the cure time we give you
Ventilation matters in a new home, which is still drying out. Use the extractor fan or open a window after showers.
Don’t let the snagging period run out with sealant problems unreported. After that, putting it right may fall to you, so raise it early.
What new build mastic looks like in Steep
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 Petersfield station, it’s worth checking the sealant early, while snags are still fresh.
Steep is about 1 mile north of Petersfield, in Hampshire. Homes, rented property, offices and hotels in Steep can book us for new build mastic. Every job comes with our one-year guarantee. Steep is one of 683 towns and villages in Hampshire we cover. Portsmouth is on our list too, around 16 miles away.
All of GU32 is covered for new build mastic, from the main roads to the quietest streets. Local streets include Church Road and Mill Lane, all of which we cover. We also cover the places around Steep: Steep Marsh (1 mile north), Sheet (1 mile south-east), Oakshott (1 mile north), Petersfield (1 mile south) and Stroud (2 miles south-west). We also work in nearby towns such as Havant (11 miles south), Horndean (9 miles south), Alton (9 miles north), Waterlooville (11 miles south), Purbrook (12 miles south) and Bordon (7 miles north-east).
Around Steep
In Steep, that means homes and buildings near The Cricketers Inn, Churcher's College and The Petersfield School, among other places. Steep’s nearest station is Petersfield station, about 1.4 miles south. Other landmarks nearby include Bear Museum (1.7 miles south) and Petersfield Community Hospital (1.5 miles south). Green spaces nearby include Liss Riverside Railway Walk South and Wheatham Hill.
Towns and villages near Steep
Also in Steep
When it is not the sealant
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Your warranty claim itself, which is between you and the builder
- Cracking that points to a structural problem
- Damaged fittings that need replacing
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Windows & doors
- Plot handovers
- Skirting & floors
- Bathrooms & en suites
- Kitchens
- Show homes
Common problems we fix in Steep
Not every new-build joint gets the right sealant: caulk where water collects, or a rigid product on a moving joint. Neither lasts long.
Most people get in touch when they notice something like this:
- Skirting joints opening in the first winter
- Second-fix sealing on new plots
- New-build shower sealant that has already split
- Smeared, uneven beads picked up at snagging
Around Steep, as everywhere, new build mastic is only as good as the preparation behind it.
Questions to ask before booking
- What guarantee comes with the work
- Are they insured?
- How the joint is cleaned and prepared
- Which sealant they’ll use, and why
What the job involves on each surface
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
Kitchens
Worktop, upstand and sink joints in new kitchens often get a hurried bead. We remove it and reseal with a kitchen-suitable sealant.
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 for most snagging lists, longer for a run of plots, including the tidy-up. Somewhere like Steep 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 any work starts.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
Getting a quote
For new build mastic in Steep, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.