Surrey · England
Sand mastic for sash & case windows in Brook, Surrey
Our applicators work in Brook on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
- Mastic worn away on windows facing the weather
What the job involves on each surface
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we will confirm what’s needed.
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
About our sand mastic in Brook
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on brick reveals, tenement windows and timber door frames, and people most often call us about a silicone bead on a sash window that spoils the look and window mastic to renew ahead of painting.
Mastic can only go onto a dry, clean joint, so window work in Brook is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Brook (GU8)
- Region
- Surrey
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. In a small place like Brook, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What you get with us
- Approved under the ARBOMaster scheme
- 180+ five-star Google reviews
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
Read what affects the cost and our reviews.
Nearby places to Brook
What else we do in Brook
What affects the quote in Brook
Your quote is based on your job. We look at:
- Which sealant suits the joint
- The size of the job
- Any working-time requirements on site
- Mould in or behind the old joints
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Helping us quote
When you call or email, it’s useful to know:
- The problem you’ve noticed
- Whether it’s a home or a business
- A few pictures by email, if you can
- Where the property is
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
When it is not the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Sashes that need overhauling
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds
Brook homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Witley station? Then any sash windows need sound mastic to keep draughts and rain out.
Brook is about 8 miles south-east of Farnham, in Surrey. From the centre of Brook to the outskirts, we cover sand mastic for every kind of property. Across Surrey, we cover 395 places, Brook among them. We also work in Crawley, about 21 miles from Brook.
We cover every part of the GU8 postcode area for sand mastic. We cover properties on Brook Road, Church Lane and Park Lane and the roads around them. Nearby, we also carry out sand mastic in Sandhills (1 mile east), Wormley (1 mile east), Bowlhead Green (1 mile west), Witley (2 miles north-east) and Hambledon (2 miles east). Larger places within reach include Guildford (9 miles north-east), Woking (13 miles north), Camberley (14 miles north), Farnham (8 miles north-west), Frimley (13 miles north) and Haslemere (4 miles south-west).
Landmarks near Brook
In Brook, that means homes and buildings near Rodborough and Dog And Pheasant Public House, among other places. The closest station to Brook is Witley station, about 1 mile east of the centre. Well-known places in the area include Milford Hospital (3 miles north-east). The countryside around Brook includes Gibbet Hill and Upper Lake.
Brook: your questions answered
Can you do sand mastic in Brook?
Yes. We work across London and the South East, and Brook is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Can you help a landlord with a rental near Witley station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Do you offer different sealant colours?
We help you choose a colour that suits. The choice depends on the product the joint needs.
How long does sand mastic take to harden?
It forms a skin fairly soon, then hardens over a longer period. Timing depends on the weather and the joint.
Is there any odour?
Some sealants have a smell while they cure. Opening a window helps.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Brook, along with the rest of our area.
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.
Should I use sand mastic or silicone?
That depends on your windows. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Signs you need sand mastic in Brook
Timber swells and shrinks with the weather. That movement opens up the mastic joint little by little.
It’s worth asking for a quote if you see:
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
- Modern sealant on a period surround
- Draughty sash windows at the surround
If you look after a building such as King Edward's School Witley, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Is the old sealant removed completely?
- What guarantee comes with the work
- Who turns up on the day
- Is VAT in the price?
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
What happens on the day
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Brook, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.