Hertfordshire · England
Mastic man in Oaklands
Shower, bath, kitchen and window resealing for homes in Oaklands, on the old Great North Road between Welwyn village and Mardley Heath.
- Fully insured
- Arbo and Everbuild sealants
- Clear quote before we start
Resealing and mastic work across Oaklands
Oaklands is a residential part of Welwyn parish, strung along the old Great North Road on the north side of Welwyn village, with Welwyn Garden City a short drive to the south. It is mostly family homes, and family homes get through bathroom sealant. Mr Mastic covers Oaklands from our base in Crawley, resealing baths, showers, basins and worktops and replacing tired window and door mastic.
We start by taking the old sealant out completely, because new silicone won’t stick properly to the remains of the old. Once the joint is clean, dry and treated for mould, we lay one smooth bead of the right product. Our shower resealing page walks through each step.
Family houses along the old Great North Road
Welwyn grew a great deal in the twentieth century, with estates built to the south, west and north of the old village, and Oaklands is part of that northern spread. Its streets are largely detached and semi-detached family houses with gardens, and many have had extensions, loft conversions or new kitchens and bathrooms added over the years. Each of those changes leaves new joints that need sealing, and older ones that were sealed in a hurry.
In family bathrooms, the bath and shower seals see the most wear. Children splash, showers run every morning, and a seal that started out white goes grey and then black in the corners. In kitchens, the joint along the back of the worktop and around the sink takes a steady soaking, and once it shrinks, water gets behind and swells the worktop edge. Our kitchen resealing service covers worktops, sinks and upstands.
Most homes here have had their original windows replaced with uPVC at some point. The mastic around those frames, often laid when the windows went in, tends to harden, crack and pull away from the brick after enough summers.

Extensions, mature trees and the heath next door
Mardley Heath, a 41-hectare local nature reserve, lies close by, and many Oaklands gardens have mature trees. Shaded walls stay damp for longer, and the frames on those sides of the house tend to show mould and failing mastic before the rest. We look closely at sills and bottom corners, cut out anything soft or cracked and use a flexible, weatherproof sealant.
Extensions bring a different job: the joint where new brickwork, render or a conservatory meets the original wall. Those two parts of the house move differently, so a rigid filler soon cracks. A properly sized, flexible joint with backing rod where needed lets them move without opening up.
Schools, landlords and nearby businesses
Oaklands Primary School is on the Great North Road, and schools, nurseries and churches in and around Welwyn all have washrooms and kitchens that need sound sealant. We can plan that work for holidays or after hours.
We also work for landlords and letting agents with homes in Oaklands, Welwyn and Welwyn Garden City, resealing between tenancies and after a tenant reports mould or a leak. Offices, shops and workplaces in Welwyn Garden City are well within reach for commercial jobs.
How it works
- Get in touch. Call or email with the job, your postcode and a few photos if you have them.
- Agree the price. You get a clear quote up front, and we book a date that suits you.
- Cut out and prepare. All the old sealant comes out, and the joints are cleaned, treated and dried.
- Lay the new bead. We apply the right product for each joint and tool it to a clean, even line.
- Leave it to cure. We tell you how long to leave it before use, and the work carries our one-year guarantee.
Jobs we take on in Oaklands
- Bathroom & kitchen resealing: Every joint in the bathroom and kitchen, from the bath edge to the worktop, stripped back and resealed with anti-fungal silicone.
- Window & door mastic: Hardened, gappy mastic around frames, sills and French or patio doors cut out and renewed to keep draughts and rain out.
- Commercial & hotel sealant: Commercial washrooms, kitchens and wet areas resealed floor by floor, so only a few rooms are out of use at once.
- Remedial sealant & repairs: Failed, botched or over-sealed joints stripped out, the cause found and the joint resealed properly.
- Fire-rated sealant: Gaps in fire-separating walls and floors sealed with fire-rated products, following the tested details for each one.
- External & façade joints: Expansion joints in brick, render and cladding cut out and renewed at the right depth so they can move without splitting.
- New-build mastic & snagging: Failed builder sealant in new homes put right, and plot mastic for developers.
- Floor & skirting joints: Gaps under skirting boards, tile movement joints and concrete floor joints sealed with a product that suits the traffic.
- Regrouting: Cracked, stained or crumbling grout raked out and replaced, with corners resealed in silicone.
- Glazing & conservatory sealant: Glass-to-frame joints on conservatories, rooflights and shower screens cut out and resealed.
- Gutter, fascia & soffit sealing: Exterior joints at gutters, fascias and soffits resealed to stop drips and staining down the wall.
- Sand mastic for sash & case windows: Traditional sand mastic for period windows and doors where a modern sealant would look out of place.
Why choose Mr Mastic in Oaklands
A family home deserves a seal that lasts, and that is what we aim for in Oaklands. Mr Mastic has over 20 years of experience, is fully insured and is an ARBOMaster approved applicator. We work with Arbo and Everbuild sealants, and we’ve now completed more than 2,847 projects. Over 180 five-star reviews give us a 4.9-star rating on Google. We’ll give you a clear quote before we start and a one-year guarantee once the job is done.
Places we pass in Oaklands
The nearest station to the town centre is Welwyn North station. Places most people will know nearby are Howard Centre (3 miles south), Datchworth Museum (1.5 miles east) and Benington Castle (4.8 miles north-east). Closer in, we work on homes, rented flats and businesses near Oaklands Primary School, Monk's Walk School, Church of St Michael and All Angels and The North Star pub. For open space, Mardley Heath is close by.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“We had old mastic that needed replacing throughout our kitchen and bathrooms. The mastic man professional was knowledgeable, quoted fairly, and delivered excellent quality work. Highly recommend!”
“Professional mastic man service from start to finish. They assessed the work properly, gave a clear quote, and executed the job perfectly. Very satisfied with the results.”
“1950s terrace on Crossways — bath had black mould coming back constantly. Mr Mastic stripped it all back and did it properly. Bathroom looks brand new.”
Parts of Oaklands we work in
Choose your part of town for local details, or call 07833 053749 or email us and tell us your postcode.
Towns near Oaklands
Questions from Oaklands
Do you cover all of Oaklands?
Yes. We cover the whole of Oaklands and the rest of Welwyn parish, including Welwyn village and Mardley Heath, as well as Welwyn Garden City and Knebworth nearby.
My family shower seal goes black within months. Why?
Usually mould was left behind the old bead, or the shower stays wet for long periods. We remove all of it, treat the joint and use anti-fungal silicone.
Can you seal the joint where my extension meets the house?
Yes. We cut out cracked filler or mastic and use a flexible, weatherproof sealant sized to cope with movement between the old and new walls.
Water is getting behind my kitchen worktop. Can you help?
Yes. We remove the shrunken sealant, let the area dry and reseal along the worktop, upstand and sink.
Do you reseal around conservatories?
Yes. We replace failed sealant where the conservatory frame meets the house wall and around the frames themselves where they can be reached safely.
Do you reseal for landlords in Welwyn Garden City too?
Yes. We reseal between tenancies across Oaklands, Welwyn and Welwyn Garden City, and can quote for several homes together.
Is there any mess?
Very little. We bag up the old sealant and clean down before we leave.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee.
