Surrey · England
Sand mastic for sash & case windows in Outwood, Surrey
Window and door surrounds in Outwood need attention? We remove the old material, prepare the joints and seal them properly.
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
Your questions about sand mastic in Outwood
Do you cover smaller places like Outwood?
Yes, Outwood is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do sand mastic in Outwood?
Yes, Outwood is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Where is Mr Mastic based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
What guarantee comes with the work?
There’s a 12-month guarantee on every job, sand mastic included.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll give you a better idea when we quote.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Do I have to be there?
It depends on the job. For work indoors, someone needs to let us in.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames normally get a flexible sealant.
About our sand mastic in Outwood
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you’re dealing with wind and rain getting in round a sash window and open joints round the window box, we can help, on period & listed homes, brick reveals and timber door frames alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Outwood is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- Outwood (RH1)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It takes into account:
- How many areas need sealing
- Any mould that needs treating
- When we can work, for business premises
- Access and height
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Roughly how big the job is
- A few pictures by email, if you can
- What’s wrong with the joints now
- Whether it’s a home or a business
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Avoid heavy scraping on the mastic joint
- Check the mastic when you check the paintwork
- Make sure water runs off the sill
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
What we’re called out for in Outwood
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Most people get in touch when they notice one of these:
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
In the older streets around Church of St John the Baptist, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before booking
- Whether the sealant suits the joint
- What preparation is included
- Is VAT in the price?
- The length of the guarantee
Landlords, agents and businesses in Outwood
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
DIY sealant or a professional job?
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.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Decayed frames that need repair
- Masonry that needs repairing
- Sashes that need overhauling
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Tenement windows
- Stone surrounds
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
Towns and villages near Outwood
What else we do in Outwood
Windows and doors in Outwood
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Oakwood School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Salfords station, any sash windows need sound mastic to keep draughts and rain out.
Outwood is about 3 miles east of Horley, in Surrey. Jobs in Outwood get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Across Surrey, we cover 395 places, Outwood among them. There’s also a page for Crawley, roughly 7 miles from Outwood.
Work in RH1 works the same way as everywhere else we cover. Local streets include Miller's Lane, Bellwether Lane and Scott's Hill, all of which we cover. Close by, we work in Smallfield (1 mile south), Horley (3 miles west), Burstow (3 miles south), Fernhill (3 miles south-west) and Keeper's Corner (3 miles south). Further out, we also cover Epsom (12 miles north-west), Redhill (4 miles north-west), Ewell (13 miles north-west), Reigate (5 miles north-west), Caterham (7 miles north) and Dorking (10 miles west).
Around Outwood
We work in homes and buildings around The Castle pub. The closest station to Outwood is Salfords station, about 2.2 miles west of the centre. Well-known places in the area include Effingham Park Motor Museum (3.7 miles south) and East Surrey Hospital (2.9 miles north-west). Not far away are Bay Pond and Hedgecourt Lake.
How the visit works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Outwood, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- Old, loose 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.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we will take it from there.