Hampshire · England
New-build mastic & snagging in Steep Marsh, Hampshire
We cover Steep Marsh for plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly.
- Sealant applied over dusty or wet surfaces
- Frame joints opening as the plaster dries
- Smeared, uneven beads picked up at snagging
Why deal with it now?
A failed shower or bath seal in a new home lets water into floors and walls that are still drying out. Resealing promptly protects the new finishes around it. Older cottages and farmhouses around Steep Marsh can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why Steep Marsh clients choose us
- White, clear, grey or another colour, product permitting
- Anti-fungal silicone where joints get wet
- 20+ years of sealant experience
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or what customers say.
New build mastic in Steep Marsh, done properly
Some new-home owners let the house settle before resealing. For small cosmetic gaps, that’s reasonable, but a seal that’s letting water through needs doing now. We work on plot handovers, show homes and bathrooms & en suites, and people most often call us about worktop and upstand sealant coming away and untidy sealant flagged on a snagging list.
Work in a small place like Steep Marsh 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.
- Place
- Steep Marsh (GU32)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Joints and finishes in Steep Marsh homes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For new homes near Petersfield station, it’s worth checking the sealant early, while snags are still fresh.
Steep Marsh is about 2 miles north of Petersfield, in Hampshire. Across the GU32 area, our applicators can take on new build mastic. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. We also work in Portsmouth, around 17 miles away.
Work in GU32 works the same way as everywhere else we cover. Close by, we work in Steep (1 mile south), Oakshott (1 mile north), Sheet (1 mile south-east), Petersfield (2 miles south) and Hawkley (2 miles north). Within a short drive, we also cover Havant (12 miles south), Horndean (9 miles south), Alton (8 miles north), Waterlooville (11 miles south), Purbrook (12 miles south) and Bordon (7 miles north-east).
Around Steep Marsh
Around Steep Marsh, our work takes us to homes and buildings near The Cricketers Inn and The Petersfield School and the streets around them. For rail, the closest station is Petersfield station, about 1.7 miles south. Nearby you will also find Bear Museum (2 miles south) and Petersfield Community Hospital (1.8 miles south). The countryside around Steep Marsh includes Wheatham Hill and Liss Riverside Railway Walk South.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How it works
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the number of plots. In a small place like Steep Marsh, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked for movement before work begins.
- Old sealant is cut out and the joints cleaned.
- 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.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
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Common problems we fix in Steep Marsh
Sealant applied onto damp surfaces does not bond well. Site programmes don’t always leave time for joints to dry before the sealant goes on.
Common reasons people contact us are:
- Plot mastic for developers ahead of handover
- Worktop and upstand sealant coming away
- Untidy sealant flagged on a snagging list
- Sealant that never bonded to the surface
In and around Steep Marsh, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Is VAT in the price?
- How the colour is chosen
- Whether they’re fully insured
- When the joint can take water or movement
How we quote for new build mastic
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- The product the joint needs
- Any mould that needs treating
- The old material and how stubborn it is
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Helping us quote
When you contact us, these details help:
- How we’d reach the joints
- If someone has resealed it before
- The problem you’ve noticed
- The type of property
If you are in Steep Marsh and need new build mastic, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Nearby places to Steep Marsh
More services for Steep Marsh
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Avoid running a DIY bead over the old one
- Keep water off fresh sealant until it has cured
- Look at the sealant regularly in the first couple of years
- Raise failed sealant with the developer while you are covered
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Small faults turn into leaks if left in a busy bathroom.
What sealant work can’t fix
In fairness, some problems need a different trade:
- Movement caused by a poorly fitted tray or bath
- Structural cracks in walls or ceilings
- Leaking fittings rather than failed sealant
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Where we work in Steep Marsh
- Plot handovers
- Kitchens
- Skirting & floors
- Show homes
- Windows & doors
- Bathrooms & en suites
Steep Marsh: your questions answered
Will you come out to Steep Marsh?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is Steep Marsh in your area for new build mastic?
Yes. We work across London and the South East, and Steep Marsh is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Where are you based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
What colour sealant will you use?
We use white, clear or a colour to suit the finishes. Tell us what you’d like when you get a quote.
How long will you be here?
That depends on how much there is to do, but most jobs take anything from a few hours to several days, depending on the number of plots. We will give you a better idea when we quote.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.