Kent · England
New-build mastic & snagging in Crayford, Kent
Professional new build mastic in and around Crayford, with old sealant always removed completely and a 12-month guarantee.
- Cracked sealant around new window and door frames
- Untidy sealant flagged on a snagging list
- Gaps behind new kitchen upstands
The process
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours in a single home. Parking around Crayford is usually easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
- Move anything stored near the joints
Getting a quote
For new build mastic in Crayford, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Advice
How we handle new build mastic in Crayford
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks. We work on windows & doors, plot handovers and kitchens, and the jobs we see most are gaps opening as the house dries out and settles and cracked caulk along new skirting.
Homes around Crayford range from older cottages to newer houses, and their floors range just as widely, each moving in its own way. Skirting and threshold joints need a sealant that suits the floor.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Crayford (DA1, DA5, DA7)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. Homes in smaller places like Crayford can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Crayford
- Homes, businesses and hotels
- We’re fully insured
- We never seal over old sealant
- Colour picked to suit the job
Take a look at what affects the cost and our reviews.
Nearby places to Crayford
Also in Crayford
Do you need new build mastic in Crayford?
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
People generally contact us when they notice one of these:
- Skirting joints opening in the first winter
- Untidy sealant flagged on a snagging list
- Kitchen sealant that has pulled off the wall
- Cracks appearing as a new home settles
In and around Crayford, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
What to look for in a quote
- Whether they seal over old material or remove it
- What guarantee comes with the work
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
Quotes for new build mastic in Crayford
The quote reflects the job in front of us. We take into account:
- Which sealant suits the joint
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- The amount of work
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we’ll go through it with you.
Asking for a quote
To make quoting easier, please include:
- Whether it’s a home or a business
- What’s wrong with the joints now
- Where the job is, and your postcode
- A few pictures by email, if you can
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
New build mastic in Crayford: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Crayford station, the sealant around baths, showers and frames is worth checking in the first year or two.
Crayford is about 2 miles west of Dartford, in Kent. If you need new build mastic in Crayford, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Kent from our Crawley base. Across Kent, we cover 922 places, Crayford among them. London is on our list too, around 12 miles away.
All of DA1, DA5 and DA7 is within our area for new build mastic. If you need new build mastic at a property on Swan Lane, Dale Road and Ross Road or anywhere close by, our applicators can take on the job. If you’re just outside Crayford, we cover Bowmans (1 mile south), Barnes Cray (1 mile north-east), Barnehurst (1 mile north-west), Coldblow (1 mile south-west) and Wilmington (1 mile south). Further out, we also cover Sevenoaks (12 miles south), Gravesend (9 miles east), Northfleet (7 miles east), Swanley (4 miles south), Swanscombe (5 miles east) and Windmill Hill (8 miles east).
Local landmarks in Crayford
Locally, jobs take us to homes and businesses close to Haberdashers' Aske's Crayford Academy, The Bear and Ragged Staff pub and St Catherine's Catholic School and the streets around them. There’s a railway station in Crayford itself: Crayford station. Nearby you’ll also find Bexley Museum (0.9 miles west) and West Hill Hospital (1.3 miles east). The countryside around Crayford includes Wansunt Pit.
Landlords, agents and businesses in Crayford
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
FAQs for Crayford
Is Crayford within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you cover Crayford for new build mastic?
Yes. We work across London and the South East, and Crayford is part of that. Just call 0345 464 0079 or email us with a few details of the job.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will explain our choice.
Why has my new-build shower seal failed already?
It’s common, and there are usually two reasons: movement as the house dries and settles, and sealant laid onto dust without primer. Cutting it out and resealing properly fixes both.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Will you just run a new bead over the existing one?
No. Fresh silicone doesn’t stick to the old layer, so it soon lifts and traps water. The old sealant always comes out first.
Should I go to my builder first?
While the snagging or warranty period runs, the builder should be your first contact. If they’re slow or the fix does not last, we can help.
How long does new build mastic take?
Typically it takes anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer, and we will say how long yours will take.
Different surfaces, different methods
Show homes
Show homes need sealant that looks right from day one. Every bead is neat and coloured to suit the room.
Skirting and floors
Wet-area floor joints need a flexible seal. We seal them with a sealant suited to wet areas.