Buckinghamshire · England
Iver Sand Mastic
Problem with your window and door surrounds in Iver? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Open joints round the window box
- Draughty sash windows at the surround
- Mastic worn away on windows facing the weather
Sand mastic for homes and businesses in Iver
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we’ll talk through which suits your home. Typical jobs include gaps where the frame meets the masonry and weathered mastic on the most exposed windows, across timber door frames, tenement windows and stone surrounds.
In a village or hamlet like Iver, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Your job is guaranteed for a year, as with all our work.
- Place
- Iver (SL0)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
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.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What we cannot put right
We’d rather tell you now than do work that won’t last, so these are the limits:
- Broken panes
- Sashes that need overhauling
- Damaged stone surrounds
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Stone surrounds
- Sash and case windows
- Timber door frames
- Tenement windows
- Brick reveals
- Period & listed homes
Do you need sand mastic in Iver?
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint, and they usually need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
- Old sand mastic that has cracked, crumbled or fallen out
Homes close to Church of St Peter include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- What insurance they hold
- How the surfaces are prepared before sealing
- Whether VAT is included
- Which sealant they’ll use, and why
What we do, step by step
At the end, we look at the finished work together and explain the cure time. The work normally takes anything from a few hours to a full day, depending on how many windows, depending on how much there is to do. Somewhere as small as Iver, 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.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- 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
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Related advice
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Renew mastic before redecorating the windows
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
- Keep sills and gutters clear so water drains away
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Questions from Iver
Is Iver within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Iver station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Where are you based?
We work from Crawley. We cover Iver and the rest of Buckinghamshire.
How the job changes by surface
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Sand mastic in Iver: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Ickenham Hall (about 4.1 miles north-east) nearby, there’s older building stock in the area around Iver as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Iver station, older sash windows in a rental need their mastic kept sound to keep the weather out. Schools such as Iver Village Infant School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Iver is about 3 miles south-west of Hillingdon, in Buckinghamshire. Iver gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 263 towns and villages across Buckinghamshire, large and small. Our London page covers work nearby, about 18 miles away.
All of SL0 is within our area for sand mastic, from the main roads to the quietest streets. You will find streets such as High Street, Woodcock Way and Dutton Way. Nearby, we also carry out sand mastic in Shreding Green (1 mile west), Richings Park (1 mile south), Iver Heath (1 mile north-west), George Green (2 miles west) and Langley (2 miles south-west). Larger places within reach include High Wycombe (13 miles north-west), Chesham (14 miles north), Marlow (12 miles west), Amersham (11 miles north), Beaconsfield (9 miles north-west) and Chalfont St Peter (6 miles north).
Near you in Iver
In Iver, that means homes and buildings near Uxbridge High School, The Chequers pub and West Middlesex College and the streets around them. The nearest railway station is Iver station, roughly 0.8 miles south of the centre. Nearby you will also find Windsor Castle (4.8 miles south-west) and Hillingdon Hospital (2.1 miles east). Open spaces near Iver include Uxbridge Moor.