Hertfordshire · England
Window Mastic in Roe Green
Mastic around window and door frames, sills and patio doors in Roe Green, with a 12-month guarantee on every job. Ask us for a quote.
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
- Damp patches on the reveal after heavy rain
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Window mastic for homes and businesses in Roe Green
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on composite doors, timber windows & doors and patio & French doors, and the jobs we see most are cracked internal joints between frame and plaster and mastic that has split away from the wall.
Somewhere as small as Roe Green, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Whatever the size of the job, you get the same one-year guarantee.
- Place
- Roe Green (SG9)
- Region
- Hertfordshire
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Don’t paint over the silicone
- Do not aim a pressure washer at the joints
- Keep solvents and bleach off the sealant
- Ventilate rooms so frames don’t stay wet inside
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
How we quote for window mastic
Every job gets its own quote. These are the things that affect it:
- How easy the joints are to reach
- The number and length of the joints
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or drop us an email.
Helping us quote
When you call or email, it’s useful to know:
- The problem you’ve noticed
- If someone has resealed it before
- The rough size of the job
- If it’s domestic, commercial or a hotel
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Common problems we fix in Roe Green
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
Signs it’s time to call us include:
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Draughty joints inside around the window
- Gaps where the sill meets the wall
Managing a site like Sandon Junior Mixed and Infant School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Whether you can choose the colour
- Is the old sealant removed completely?
- What happens if they find a problem under the old sealant
- Which sealant they’ll use, and why
How it works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a few frames, or a day or more for a whole house. In a small place like Roe Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
Getting a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
What window mastic looks like in Roe Green
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Ashwell & Morden station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. In the older streets around Church of All Saints, the joint between an old wall and a newer frame is usually the first place rain gets in.
Roe Green is in Hertfordshire. Roe Green gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Roe Green is one of 381 towns and villages in Hertfordshire where we work. You can also see our page for Chelmsford, about 30 miles away.
We work across SG9 for window mastic. Neighbouring places we cover for window mastic include Sandon (1 mile north-east), Green End (1 mile east), Rushden (1 mile south-west), Buckland (3 miles east) and Chipping (3 miles south-east). Further out, we also cover Stevenage (7 miles south-west), Bishop's Stortford (13 miles south-east), Welwyn Garden City (14 miles south), Hitchin (8 miles west), Hertford (13 miles south) and Letchworth (6 miles west).
Landmarks near Roe Green
The nearest railway station is Ashwell & Morden station, about 3.2 miles north. Nearby you’ll also find Clothall Castle (3.1 miles south-west). The countryside around Roe Green includes Hawkins Wood.
What else we do in Roe Green
What sealant work can’t fix
A few problems are outside what sealant work can do:
- A sash or casement that won’t close properly
- A door that needs adjusting, rehanging or new seals
- Damp problems in the wall away from the window
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Surfaces we seal
- Patio & French doors
- uPVC windows
- Aluminium frames
- Composite doors
- Timber windows & doors
- Window sills
Landlord and commercial work in Roe Green
We also work for property managers and facilities teams in Roe Green and across Hertfordshire. Several sites can be quoted together, and we’re fully insured.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Roe Green: your questions answered
Do you work for landlords with property near Ashwell & Morden station?
Yes. We work for landlords and letting agents as well as homeowners. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Do you cover Roe Green for window mastic?
Yes. We work across London and the South East, and Roe Green is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Can I paint over the new sealant?
Not normally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
How much does window mastic cost in Roe Green?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can resealing stop a draught around my window?
In many cases. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
Can you get sealant to suit coloured frames?
Yes, in most cases. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you don’t need to watch us work.