Essex · England
Brookstreet Sand Mastic
Window and door surrounds in Brookstreet need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- Draughty sash windows at the surround
The process
On the day, there’s very little for you to do. Show us the job and we will take it from there. The work itself takes a few hours per window, depending on the condition of the joints. In a small place like Brookstreet, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Related advice
How we handle sand mastic in Brookstreet
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. If you have draughts and rain around sash boxes and cement or filler used on old window joints that has cracked, we can put it right, on tenement windows, period & listed homes and stone surrounds alike.
Somewhere as small as Brookstreet, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
Whatever the size of the job, you get the same 12-month guarantee in Brookstreet and across Essex.
- Place
- Brookstreet (CM6)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
Looking after it afterwards
So the new joints stay in good condition:
- Leave the new mastic unpainted
- Go gently near the mastic when preparing windows
- Plan mastic work ahead of painting
- Keep modern sealant off the mastic
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
Common questions in Brookstreet
Will you come out to Brookstreet?
Yes, Brookstreet is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is there a guarantee on sand mastic in Brookstreet?
All our work, in Brookstreet and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Can you quote for more than one area?
Yes, we can. More than one area can go on one quote.
Can sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Can old silicone round a sash window be swapped for sand mastic?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Do you work for letting agents?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
Do you offer different sealant colours?
We’ll suggest a colour to suit the surroundings. The product needed can limit the range.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Common problems we fix in Brookstreet
Sand mastic slowly weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Most people get in touch when they notice something like this:
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
- Failed mastic on an exposed elevation
Schools such as The Flitch Green Academy are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- What guarantee comes with the work
- When the joint can take water or movement
- What product goes in the joint
- Whether you can choose the colour
What happens if it’s left?
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In a small place like Brookstreet, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why Brookstreet clients choose us
- 180+ five-star Google reviews
- 12-month guarantee on every job
- ARBOMaster approved applicator
- Over 20 years’ experience
Read how sealant jobs are priced and customer reviews.
Brookstreet homes and the weather
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.
For an older house near a landmark such as Church of St Mary the Virgin, the joint between an old wall and a newer frame is usually the first place rain gets in.
Brookstreet is about 7 miles west of Braintree, in Essex. Every kind of property in Brookstreet can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Brookstreet is one of 644 places in Essex we cover. We also work in Chelmsford, about 9 miles from Brookstreet.
We work across the CM6 postcode area for sand mastic and the streets around it. If you’re just outside Brookstreet, we cover Little Dunmow (1 mile east), Felsted (1 mile east), North End (1 mile south), Causeway End (2 miles south-east) and Watch House Green (2 miles east). Larger places within reach include Chelmsford (9 miles south), Braintree (7 miles east), Harlow (14 miles south-west), Maldon (15 miles south-east), Witham (11 miles south-east) and Saffron Walden (13 miles north-west).
Around Brookstreet
Locally, jobs take us to homes and businesses close to Flitch Of Bacon Public House, among other places. Other landmarks nearby include Little Easton Moat (3.6 miles north-west) and Braintree Community Hospital (5.8 miles east). Open spaces near Brookstreet include Phyllis Currie Nature Reserve.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
- Putty and glazing repairs
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Brookstreet
- Stone surrounds
- Sash and case windows
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
What affects the cost of sand mastic
Your quote is based on your job. We look at:
- Any mould that needs treating
- When we can work, for business premises
- Whether the work is at height
- How many areas need sealing
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Helping us quote
There’s no need for technical detail. Just tell us:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Whether it’s a home or a business
- Any previous sealing or DIY work
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.