Construction and new-build mastic in Knaphill, Surrey
Planning work on a mastic package in Knaphill? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Different trades sealing to different standards
- Sanitary sealant damaged by following trades
- Missed perimeter joints on a new elevation
Construction mastic for Knaphill sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
What we can’t put right
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. These need a different solution:
- Frame gaps too wide for sealant, which the installer needs to correct
- Joint design decisions that belong to the architect or engineer
- Damage to finishes by other trades after we have sealed
If in doubt, give us a call on 01277 525 020 or send photos by email and we’ll say what we think.
What we seal
- Sanitary and kitchen joints
- Cladding and panel joints
- Floor and skirting junctions
- Internal decorators’ caulk
- Window and door perimeters
- Brick and block movement joints
How we handle construction mastic in Knaphill
On refurbishments, the mastic package normally includes cutting out old sealant as well as sealing new work. Existing joints have to be stripped back to sound faces, because fresh sealant can’t key into cured silicone and the asbestos survey is checked first on older stock. After that, the joints are prepared and sealed to the specification. We work on window and door perimeters, internal decorators’ caulk and brick and block movement joints, and the usual reasons a site gets in touch are missed perimeter joints on a new elevation and perimeter gaps outside the sealant’s range. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Knaphill, preparation and product choice get the time they need.
Around places like Knaphill, a lot of construction is the conversion of older buildings, and the sealant at those junctions has to cope with two materials that move differently.
We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant.
- Where
- Knaphill (GU21, GU24)
- Wider area
- Surrey
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
What we’re called out for in Knaphill
Wide, tapered or inconsistent gaps around frames are a common problem. Every product has limits on how wide a joint it can bridge and gaps beyond it need packing or adjusting by the frame installer. Better to raise it at the start than seal a joint that’s bound to fail.
Any of the following is a good reason to get the joints checked over:
- Missed perimeter joints on a new elevation
- Snag items on joints that need redoing before handover
- Inconsistent sealant finishes from plot to plot
- Perimeter gaps outside the sealant’s range
New wings at hospitals like Cygnet Hospital, less than half a mile to the south of Knaphill, bring long runs of window and panel joints to seal.
What your quote should include
- Will RAMS and insurance details be available?
- Whether primer will be used where the manufacturer specifies it
- What the guarantee covers, and for how long
- Is the sealant right for the movement and the substrate?
What the job involves on each surface
Fire-rated sealant where specified
Fire-rated sealant forms part of some packages, installed to the product’s tested detail where it is specified. The design and sign-off of fire stopping sit with the designer, principal designer or fire engineer.
Window and door perimeters
Inside, a paintable sealant or decorators’ caulk is used where the joint doesn’t move much. We follow what’s specified, and colour-matched products can be used where the frame is on show.
When to bring in a specialist
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Sites and facades in and around Knaphill
Knaphill has a number of hotels close by, all within 2 miles. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. Knaphill is about 26 miles from central London. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, which keeps mastic packages in demand.
When units on a site such as Goldsworth Park Trading Estate (1.4 miles east of Knaphill) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. Building work at universities like University of Surrey (to the south of Knaphill) is often timed for the summer, mastic included.
Knaphill is about 2 miles west of Woking, in Surrey. Anywhere in GU21, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Knaphill is one of 379 places in Surrey on our list for mastic packages. We also cover Reading, some 18 miles away.
Business premises anywhere in GU21 and GU24 are within our area. We cover commercial and managed buildings on Wood Lane, High Street and Barnby Road. Close to Knaphill, our area also takes in 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). Nearby towns on our patch 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).
Around Knaphill
In Knaphill, that means premises 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, roughly 1.4 miles south-west of the centre. Well-known places in the area include The Peacocks (2.5 miles east) and Brookwood Hospital (under half a mile south). The countryside around Knaphill includes Brookwood Lye.
What affects the price in Knaphill
Each job is priced on its own details. The things that drive the figure:
- The total length or number of joints
- Induction, permit and paperwork requirements
- Whether old sealant has to be cut out first
- Phasing around occupants
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we will put a fixed figure on it.
Details that help us quote
However big the job, these details speed things up:
- Anything awkward about access or site hours
- Whether an asbestos survey exists
- Drawings or a marked-up plan, if available
- Where the site is, with the postcode
For a fixed quote, speak to us on 01277 525 020 or email a schedule or drawings with the site address and an outline of the work. Our quote form is another easy route.
Towns and villages near Knaphill
More services for Knaphill
How a job runs
The first thing on site is a walk round with your contact, agreeing which joints are in scope, where to start and what must stay open. Then we strip out anything that has failed, prepare every joint and seal it. What matters most for a job in Knaphill is a clear list of what needs doing. You’ll then get a fixed price for the work.
- We price from the drawings, specification and programme you send.
- We return a fixed quote that ties the mastic package to your programme.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Areas are sealed plot by plot or floor by floor as the trades hand them over.
- Each joint is prepared, backed to depth and sealed in the product the specification names.
- We close out snagging and hand over with a 12-month guarantee.
Before we start on site
- Move anything stored against the joints
- Tell us your opening times and when work is allowed
- Point out any areas we must not close
Get a fixed quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. If you have questions first, ring 01277 525 020 or use the quote form.
Advice
Common questions from Knaphill clients
Is Goldsworth Park Trading Estate, near Knaphill, within your area?
Yes, sites like Goldsworth Park Trading Estate are within our area, along with the rest of Knaphill. Photos and a short description are enough for a first look.
Do you take on work at healthcare sites like Cygnet Hospital?
Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.
What’s the quickest route to a quote?
The quote form is the simplest route, though you can also give us a call on 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.
Can you seal external joints in wet or cold weather?
External sealant needs a dry joint and a temperature within the product’s range. Damp, frost or condensation on frames can stop work, so internal areas are often done on those days.
Do you work in Knaphill?
Yes. We cover Knaphill. For a quote, call the office on 01277 525 020 or email us.
How do you deal with asbestos in old sealant?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.
How soon can the area be used again?
We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.