Hertfordshire · England
Piccotts End Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Piccotts End, backed by a 12-month guarantee. Call for a quick quote.
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
- Silicone on a period window that looks wrong
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
About our sand mastic in Piccotts End
Sand mastic doesn’t last for ever and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. Common call-outs are for draughts and rain around sash boxes and tired mastic found when preparing windows for paint, across period & listed homes, tenement windows and sash and case windows.
Mastic can only go onto a dry, clean joint, so window work in Piccotts End is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Piccotts End (HP1, HP2)
- Wider area
- Hertfordshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
At the end, we look at the finished work together and explain the cure time. The visit itself normally takes a few hours for a single window, longer for several, depending on the size of the job. For a village or hamlet like Piccotts End, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- 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.
Preparing for the visit
- Let us know about parking restrictions
- Clear items away from the joints we are working on
- Mention if the joints have been sealed before
Get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Advice
Piccotts End questions
Will you come out to Piccotts End?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do older homes in Piccotts End need their sealant replacing?
Often, yes: cracked, shrunken or mouldy sealant has done its job. The key is cutting all the old sealant out, as new sealant will not bond to it.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll tell you what we’re using.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
What happens if it’s left?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. In a small place like Piccotts End, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and give you a clear quote before any work starts.
Why Piccotts End clients choose us
- ARBOMaster approved applicator
- Old sealant always removed completely
- Over 20 years’ experience
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost or what customers say.
What the job involves on each surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
What affects the cost of sand mastic
There’s no set price list. What we look at:
- How many areas need sealing
- Any working-time requirements on site
- Whether there’s mould to deal with
- How easy the joints are to reach
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Whether it has been sealed before
- Photos by email, if that’s easy
- The address or postcode of the job
- The rough size of the job
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Do you need sand mastic in Piccotts End?
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
If you can see any of these, it’s time to have the joints looked at:
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
For an older house near a landmark such as St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- What insurance they hold
- Whether the sealant suits the joint
- Which colour the sealant will be
- What the cure time is
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Housing providers, facilities teams and property managers book us too in Piccotts End and across Hertfordshire. We can quote a run of properties together, and we’re fully insured.
Windows and doors in Piccotts End
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Hemel Hempstead, which Piccotts End is part of, is one of England’s post-war new towns. Many homes date from the post-war decades, and many will have had their original windows replaced. That mastic ages as well, and sills and frame heads are where leaks start.
Letting a property close to Hemel Hempstead station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Galley Hill Primary School and Nursery, the mastic around its windows and doors needs looking after like any other building’s.
Piccotts End is about 1 mile north-west of Hemel Hempstead, in Hertfordshire. From the centre of Piccotts End to the outskirts, we cover sand mastic for every kind of property. Piccotts End is one of 381 towns and villages in Hertfordshire where we work for sand mastic. You can also see our page for London, roughly 25 miles from Piccotts End.
We work across the HP1 and HP2 postcode area for sand mastic and the streets around it. Streets in the area include Piccotts End Road, Leighton Buzzard Road and Riverbank, and we cover them all. We also cover Gadebridge (1 mile south-west), Highfield (1 mile south-east), Warner's End (1 mile south-west), Grovehill (1 mile south) and Woodhall Farm (1 mile south). Larger places within reach include Watford (8 miles south-east), St Albans (6 miles east), Welwyn Garden City (12 miles east), Harpenden (6 miles north-east), Hitchin (15 miles north-east) and Hatfield (11 miles east).
Around Piccotts End
We work in homes and buildings around The Old Bell pub, Laureate Academy and Gadebridge Park. For rail, the closest station is Hemel Hempstead station, roughly 2 miles south of the centre. Nearby you’ll also find Redbourn Museum (3.8 miles north-east) and Hemel Hempstead Hospital (1.4 miles south). Open spaces near Piccotts End include Long Deans.