Hertfordshire · England
New-build mastic & snagging in Frogmore, Hertfordshire
Plot mastic for developers and snagging failed sealant in new homes for Frogmore, backed by a 12-month guarantee. Ask us for a quote.
- Gaps between new skirting and floors
- Gaps behind new kitchen upstands
- Leaking shower tray seals in a new home
How the job changes by surface
Plot handovers
Plot mastic is carried out to the developer’s schedule. Joints are prepared properly before sealing.
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.
New build mastic in Frogmore
Snagging sealant properly means taking the failed bead out completely. Fresh silicone can’t bond to the old layer, so the joint is cut out, cleaned, dried and resealed. We work on bathrooms & en suites, kitchens and show homes, and people most often call us about gaps behind new kitchen upstands and sealant applied over dusty or wet surfaces.
Around Frogmore, 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.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Frogmore (AL2)
- Wider area
- Hertfordshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work cannot fix
We will always be straight with you, so here’s what new sealant won’t do:
- Movement caused by a poorly fitted tray or bath
- Leaking fittings rather than failed sealant
- Structural cracks in walls or ceilings
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Show homes
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Kitchens
- Windows & doors
Nearby places to Frogmore
Also in Frogmore
FAQs for Frogmore
I let a flat near How Wood station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Do you cover Frogmore for new build mastic?
Yes. Our work covers London and the South East, and Frogmore is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Do you take on second-fix sealing for builders?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send us the plot schedule and we will quote.
Do you use white or clear sealant?
It depends on the joint: white or clear in most bathrooms, and a colour to suit worktops, frames and floors elsewhere. We agree the colour before we start.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Do you have insurance?
Yes. We are fully insured.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Do you work through snagging lists?
Yes. Snagging lists are a common starting point for us. We will go through the sealant items and agree what we’ll do.
New build mastic around Frogmore
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Around Frogmore, as everywhere, new build mastic is only as good as the preparation behind it.
Frogmore is about 2 miles south of St Albans, in Hertfordshire. For new build mastic in and around Frogmore, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We cover Hertfordshire from our Crawley base. 381 places in Hertfordshire are on our list, from the larger towns to small villages. London is on our list too, about 18 miles from Frogmore.
All of AL2 is within our area for new build mastic, from the main roads to the quietest streets. Streets in the area include Centaurus Square, Frogmore and Avian Avenue, and we cover them all. We also cover the places around Frogmore: Park Street (1 mile north-west), How Wood (1 mile west), Colney Street (1 mile south-east), Chiswell Green (1 mile north-west) and Sopwell (1 mile north). Within a short drive, we also cover Watford (5 miles south-west), Hemel Hempstead (6 miles north-west), Stevenage (15 miles north-east), Welwyn Garden City (8 miles north-east), Harpenden (7 miles north) and Hoddesdon (14 miles east).
Near you in Frogmore
In Frogmore, that means homes and buildings near The Old Red Lion pub and Marlborough Science Academy and the streets around them. Frogmore has its own railway station: How Wood station. Nearby you will also find Hypocaust Museum (2.3 miles north-west) and Hilfield Castle (4.5 miles south). Not far away are Verulamium Lake and Broad Colney Lakes.
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for most snagging lists, longer for a run of plots, and the area is left clean. Somewhere as small as Frogmore, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each joint is checked for movement before we start.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Before we arrive
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job.
Related advice
Work for landlords, hotels and businesses
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What affects the cost of new build mastic
Call for a quick quote. The main things that affect it are:
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
Before you ask for a quote, have a think about:
- The problem you’ve noticed
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- How we’d reach the joints
Getting a quote is simple: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Act quickly if a seal starts to leak
- Use the extractor fan every time you shower
- Clean sealant with mild detergent, not abrasives
- Photograph failed sealant before it’s redone
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers so moisture doesn’t sit on the sealant.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
When to call us in Frogmore
Baths and trays settle under load once the home is lived in. A bath sealed empty drops slightly when filled, straining the joint and can tear.
These are the problems we are asked about most:
- Gaps between new skirting and floors
- New-build shower sealant that has already split
- Internal frame sealant that has split
- Messy sealant that spoils new finishes
For new homes near How Wood station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- What guarantee comes with the work
- Who does the work, and how experienced they are
- When the joint can take water or movement
- Whether all the old sealant comes out first