Isle of Wight · England
Sand Mastic in Brookgreen
Our applicators work in Brookgreen on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Failed mastic on an exposed elevation
- Modern sealant on a period surround
- Open joints round the window box
Keeping the joints in good condition
After the cure time, these simple habits help:
- Clear gutters so water does not pour onto the windows
- Avoid heavy scraping on the mastic joint
- Don’t run silicone over sand mastic
- Check the mastic when you check the paintwork
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
Sand mastic in Brookgreen, done properly
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 and built up by hand. On older homes, it suits the building far better than silicone. If you have failed mastic on an exposed elevation and old cement repairs round a window that have failed, we can put it right.
Mastic can only go onto a dry, clean joint, so window work in Brookgreen is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Your job is guaranteed for a year, as with all our work.
- Location
- Brookgreen (PO30)
- Wider area
- Isle of Wight
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Brookgreen: local notes
Brookgreen is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Historic houses like Mottistone Manor (about 0.9 miles north-east) are a reminder that the area around Brookgreen 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.
In the older streets around St. Mary's Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Brookgreen is about 7 miles south-west of Newport, in the Isle of Wight. From the centre of Brookgreen to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Brookgreen is one of 125 places in the Isle of Wight we cover. There’s also a page for Southampton, roughly 19 miles from Brookgreen.
All of PO30 is covered for sand mastic, from the main roads to the quietest streets. If you are just outside Brookgreen, we cover Brook (1 mile north-west), Hulverstone (1 mile north-east), Dunsbury (1 mile north-west), Chilton Green (1 mile east) and Shalcombe (2 miles north). Further out, we also cover Newport (7 miles north-east), Ryde (13 miles north-east), Cowes (10 miles north-east), Sandown (12 miles east), Shanklin (12 miles east) and Ventnor (11 miles east). If you are somewhere remote, the job takes a little more planning.
Local landmarks in Brookgreen
A little further out are Brighstone Village Museum (2.2 miles east) and Yarmouth Castle (4.8 miles north-west). For a walk, there’s Westover Down.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours per window, depending on the condition of the joints, and the area is left clean. For a village or hamlet like Brookgreen, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
Get a quote
If you’re in Brookgreen and need sand mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Read more
Landlords, agents and businesses in Brookgreen
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What we can’t put right
Sealant is not the answer to every problem, and we’d rather say so up front. It won’t solve:
- Timber that has rotted
- Whether work needs listed building consent
- Damaged stone surrounds
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Brick reveals
- Timber door frames
- Tenement windows
Signs you need sand mastic in Brookgreen
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
- Draughty sash windows at the surround
Around Brookgreen, as everywhere, sand mastic is only as good as the preparation behind it.
Comparing quotes
- Which sealant they’ll use, and why
- Who does the work, and how experienced they are
- How long to leave it before use
- Whether VAT is included
Brookgreen: your questions answered
Does the coastal weather in Brookgreen affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you cover Brookgreen for sand mastic?
Yes. Our work covers London and the South East, and Brookgreen is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we will advise.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we will say how long yours will take.
Are you insured?
Yes. Mr Mastic is fully insured.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Surface by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.