Surrey · England
Knaphill New Build Mastic
New build mastic for Knaphill and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Smeared, uneven beads picked up at snagging
- Gaps between new skirting and floors
- Frame joints opening as the plaster dries
New build mastic in Knaphill, done properly
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 new bead bonds properly. If you have shower seals failing in the first year or two and kitchen sealant that has pulled off the wall, we can help.
If you’ve bought a new home in or near Knaphill, the first year or two is a good time to check the sealant. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or email us.
- Location
- Knaphill (GU21, GU24)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Knaphill
Letting agents and landlords in Knaphill can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Towns and villages near Knaphill
What else we do in Knaphill
What happens on the day
You don’t need to clear the whole room or building before we come, just the space around the work. Everything nearby is protected, and the work takes a few hours in a single home for a typical job. In a smaller place like Knaphill, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- The failed sealant is removed completely, with no layer left behind.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Tell us about any water getting in
- Clear items away from the joints we are working on
How to get a quote
Need a quote? Please ring 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Avoid running a DIY bead over the old one
- Keep water off fresh sealant until it has cured
- Act quickly if a seal starts to leak
- Avoid scourers and strong chemicals on sealant
Leave the sealant for the cure time we give you before showering or bathing. Silicone is usually left for about a day to cure enough for use.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak in a busy bathroom.
Should I try it myself first?
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 fails, we can still redo it.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
FAQs for Knaphill
Will you come out to Knaphill?
Yes, Knaphill is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Brookwood station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
My new home is still under warranty. Should I contact you?
Report it to the builder first while you are covered. Once that is done, or if they will not put it right, we can reseal it properly.
Is there a guarantee?
Yes. Every job comes with our one-year guarantee.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
What does new build mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Surface by surface
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Show homes
Bathrooms, kitchens and frames in show homes are sealed or resealed to a neat finish ready for viewings. Tell us when the home is open so we can plan around it.
Why act early in Knaphill
A hairline gap at a skirting can wait, but a leaking seal cannot. If you are unsure which you have, call 0345 464 0079 or drop us an email with pictures. Homes in smaller places like Knaphill 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.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Knaphill
- Quality sealants from Arbo and Everbuild
- Sealant colour chosen to suit
- One-year guarantee on every job
- We never seal over old sealant
Take a look at what affects the cost and our reviews.
Common problems we fix in Knaphill
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops.
These are the problems we are asked about most:
- Shower seals failing in the first year or two
- Joints pulling apart as timber shrinks
- Sealant applied over dusty or wet surfaces
- Messy sealant that spoils new finishes
If you’ve bought a new home near Brookwood station, the sealant around baths, showers and frames is worth checking in the first year or two.
What your quote should include
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- Whether they’re fully insured
New homes and floors in Knaphill
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Knaphill, as everywhere, new build mastic is only as good as the preparation behind it.
Knaphill is about 2 miles west of Woking, in Surrey. We provide new build mastic to householders, landlords and businesses in Knaphill and the surrounding area. 395 places in Surrey are on our list, large and small. You can also see our page for Reading, roughly 18 miles from Knaphill.
Every address in GU21 and GU24 is covered for new build mastic. Local streets include Wood Lane, High Street and Barnby Road. If you are just outside Knaphill, we cover Bisley (1 mile north-west), Sheet's Heath (1 mile south-west), Castle Green (1 mile north), Brookwood (1 mile south-west) and Penny Pot (1 mile north). Larger places within reach include Guildford (5 miles south), Camberley (5 miles west), Epsom (15 miles east), Farnham (11 miles south-west), Egham (8 miles north) and Walton-on-Thames (10 miles north-east).
Near you in Knaphill
Around Knaphill, our work takes us to homes and buildings near Anchor Inn, The Winston Churchill School A Specialist Sports College and Brookwood Lye and the streets around them. The nearest railway station is Brookwood station, about 1.4 miles south-west. Well-known places in the area include The Peacocks (2.5 miles east) and Brookwood Hospital (within half a mile south). Green spaces nearby include Brookwood Lye.