Hampshire · England
Purbrook Sand Mastic
Problem with your window and door surrounds in Purbrook? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Mastic dropping out of the joint
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
Leave it or put it right?
Filling over old, loose mastic doesn’t last. Raking out and preparing the joint gives it a sound base so the new work lasts. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What you get with us
- ARBOMaster approved applicator
- 12-month guarantee on every job
- Fully insured
- We leave the area clean and tidy
How we handle sand mastic in Purbrook
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We’re often asked to deal with patchy fillers round a sash window and window mastic to renew ahead of painting, on stone surrounds, timber door frames and tenement windows.
Walls in Purbrook that face the prevailing wind take the most weather, and that is generally where the sealant gives up first. Checking every frame, not just the obvious one, is time well spent.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Purbrook (PO7, PO6)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. The job normally takes a few hours for a single window, longer for several. Parking in a town like Purbrook is normally straightforward, but tell us if there’s a driveway or any restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Related advice
Different surfaces, different methods
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Should I try it myself first?
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 does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Questions from Purbrook
Does the coastal weather in Purbrook affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
I let a flat near Bedhampton station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Are you fully insured?
Yes. We’re fully insured.
Can sand mastic be painted?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Where are you based?
Mr Mastic is based in Crawley. We cover Purbrook and the rest of Hampshire.
Do you offer different sealant colours?
We’ll suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
Can I do 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.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What affects the cost of sand mastic
We quote each job individually. This is what makes a difference:
- The size of the job
- When we can work, for business premises
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- The address or postcode of the job
- A few photos by email, if you can
For sand mastic in Purbrook, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
What we can’t put right
New sealant can’t fix everything, and we will tell you before we start. It will not solve:
- Crumbling stone or brickwork round the window
- Timber that has rotted
- Decisions on consent for listed homes
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Purbrook
- Sash and case windows
- Tenement windows
- Period & listed homes
- Timber door frames
- Stone surrounds
- Brick reveals
Towns and villages near Purbrook
What else we do in Purbrook
Sand mastic in Purbrook: local notes
Purbrook is within about 2 miles 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. With historic houses such as Warblington Castle (about 3.3 miles south-east) nearby, there’s older building stock in the area around Purbrook as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Homes close to Church of St John include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. For landlords with property near Bedhampton station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as Purbrook Junior School, its window and door frames need their mastic kept sound, just like a home’s.
Purbrook is about 2 miles west of Havant, in Hampshire. We provide sand mastic to householders, landlords and businesses in Purbrook, as part of our work across Hampshire. Purbrook is one of 683 towns and villages in Hampshire where we work.
Work in PO7 and PO6 is quoted and booked the same way as anywhere else. We cover properties on London Road, Bliss Close and Delius Walk. We also cover the places around Purbrook: Purbrook Heath (1 mile west), Widley (1 mile south-west), Waterlooville (1 mile north), Farlington (2 miles south) and Bedhampton (2 miles south-east). We also work in nearby towns such as Gosport (7 miles south-west), Eastleigh (15 miles north-west), Fareham (7 miles west), Horndean (3 miles north), Hedge End (12 miles west) and Petersfield (10 miles north-east).
What’s near Purbrook
We work in homes and buildings around The Denmead Queen pub and Crookhorn College. The nearest railway station is Bedhampton station, roughly 1.9 miles south-east. Well-known places in the area include Warblington Castle (3.3 miles south-east) and World War I Remembrance Centre (2.7 miles south). For a walk, there’s Southmoor Nature Reserve and Portsdown Hill.
How to look after the new joints
So the new joints stay in good condition:
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t run silicone over sand mastic
- Inspect the joints round the windows every year or so
- Clear gutters so water doesn’t pour onto the windows
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.