Greater London · England
Sand Mastic in Addiscombe
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Addiscombe. Fully insured, ARBOMaster approved and guaranteed for a year.
- Patchy fillers round a sash window
- Draughts and rain around sash boxes
- Mastic worn away on windows facing the weather
How the job changes by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Stone surrounds
The stone is treated with care while raking out the old mastic.
About our sand mastic in Addiscombe
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We work on period & listed homes, brick reveals and timber door frames, and the jobs we see most are mastic round period door frames that has failed and gaps where the frame meets the masonry.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out, in Addiscombe as anywhere.
All of our work is guaranteed for twelve months.
- Place
- Addiscombe (CR0, SE25, CR9)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Windows and doors in Addiscombe
In London conversions and blocks, the lease decides who is responsible for the frames, so check that before you book. Historic houses like Addington Palace (about 2 miles south-east) are a reminder that the area around Addiscombe has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near St Mildred's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Addiscombe is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Addiscombe is about 2 miles north-east of Croydon, in Greater London. For sand mastic in and around Addiscombe, please phone 0345 464 0079 or email us for a quick quote. We cover Greater London from our Crawley base, Addiscombe included. Across Greater London, we cover 764 places, and Addiscombe is one of them. We also work in London, about 8 miles from Addiscombe.
Jobs for sand mastic in CR0, SE25 and CR9 works the same way as everywhere else we cover. That includes homes and businesses on Grant Road, Capri Road and Coe Avenue and the roads around them. Being close to the A232, Addiscombe is simple for us to get to for sand mastic. Other places close to Addiscombe include Shirley Oaks (1 mile east), Ashburton (1 mile north), Woodside (1 mile north), Shirley (1 mile east) and Monks Orchard (1 mile east). Further out, we also cover London (8 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
What’s near Addiscombe
Typical jobs here are in homes near The Woodside Academy, The Cricketers pub and Ashburton Park, among other places. Addiscombe’s nearest station is Norwood Junction station, roughly 1.2 miles north. Well-known places in the area include St George's Walk (1.5 miles west) and Crystal Palace Museum (2.7 miles north). Green spaces nearby include Duppas Hill and Bramley Bank.
Addiscombe questions
Can you help a landlord with a rental near Norwood Junction station?
Yes, we work for landlords and agents. Just call 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Is Addiscombe in your area for sand mastic?
Yes, Addiscombe is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Can you replace silicone on a period window with sand mastic?
Usually, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the 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.
What happens on the day
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a single window, longer for several. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
- Mention if the joints have been sealed before
Ask for a quote
If you are in Addiscombe and need sand mastic, phone 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 any work starts.
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Places near Addiscombe
Also in Addiscombe
Leave it or put it right?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why book with us
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
- Domestic, commercial and hotel work
- Fully insured
Read our cost guide or what customers say.
Landlords, agents and businesses in Addiscombe
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Looking after it afterwards
After the cure time, these simple habits help:
- Make sure water runs off the sill
- Ask a joiner to look at soft timber first
- Check with your local planning authority if your home is listed
- Inspect the joints round the windows every year or so
Avoid painting over the new mastic, which is the traditional advice. If you are redecorating, ask us first.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
What we are called out for in Addiscombe
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Most people get in touch after spotting one of these:
- Mastic that needs renewing before redecorating
- Open joints round the window box
- Cracked mastic round a front door frame
- Failed mastic on an exposed elevation
For site and facilities teams at buildings such as Oasis Academy Shirley Park, its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- Whether you can choose the colour
- What happens if the job turns out different
- What preparation is included
- Is the old sealant removed completely?