Hertfordshire · England
Mastic man in Baldock
Resealing and window mastic for Baldock’s Georgian High Street, Clothall Common, the older estates and the new homes north of the town.
- Old sealant cut out, never covered
- ARBOMaster approved
- One-year guarantee on every job
Resealing and mastic work across Baldock
Baldock is a small town with a wide reach. Its broad High Street and Whitehorse Street are lined with 18th-century fronts, the estates around the edge date from the 20th century, and a large new neighbourhood is planned to the north. Bathrooms and windows in each of those settings fail in different ways, and we tailor the sealant to the house rather than using one product for everything.
Mr Mastic covers Baldock and the villages around it from our base in Crawley. We reseal baths, showers, sinks and kitchen worktops, replace failed mastic around windows and doors, and seal external joints where frames, render and brick meet. If you have just moved into a new home and spotted gaps already, our guide to new build sealant snagging lists what to look for before you report it.
Coaching-town fronts, Clothall Common and the next phase of growth
The town’s wide streets grew out of a medieval market place, and many buildings in the centre date back to the 16th century. Wealth from brewing, malting and road traffic later lined those streets with Georgian houses, often by putting new red brick fronts on older buildings. The Baldock conservation area, designated in 1970, is compact, but it holds about 99 listed buildings. On these homes the joint between an old frame and its brick opening needs to stay flexible and neat, not thick and shiny.
Beyond the centre, Baldock grew through the 20th century as a commuter town, with terraces, semis and bungalows and, to the east, the large Clothall Common estate, built in several phases. Many of those homes have replacement uPVC windows and refitted bathrooms whose sealant is now on its second or third life.
Next comes the land north of Baldock, allocated in the North Herts Local Plan for around 2,800 homes. New homes settle and dry out in their first couple of years, and builder sealant around baths, showers and windows often needs redoing.

Shopfront flats, conservation rules and exposed edges
Plenty of Baldock’s historic buildings have flats or offices above shops, and that means shared walls, narrow stairs and bathrooms squeezed into old rooms. A shower tray on a timber floor flexes more than one on concrete, so we use a sanitary silicone with good movement and make sure the joint is fully dry before we start.
Homes on the outer estates face open farmland, and their exposed sides take plenty of weather. Where mastic around frames and doors has split, we cut it out and reseal with a weatherproof product. For larger panes, conservatories and glazed doors, our glazing sealant service covers the joints between glass, frames and brickwork.
Old inns, the Art Deco Tesco and local landlords
Baldock’s former coaching inns, such as the George and Dragon and the Rose and Crown, sit alongside cafés, takeaways and shops on the High Street, and their kitchens and customer toilets all need sound sealant. Light industry and offices add staff facilities to the mix. The town’s Tesco even occupies the former Kayser Bondor factory, with its Art Deco facade kept on the front.
Landlords and letting agents use us to refresh bathrooms and kitchens between tenancies. Our kitchen resealing service covers worktops, upstands and sinks.
How a job runs
- 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.
- Preparation first. Old sealant out completely, surfaces cleaned, mould treated and the joint left dry.
- Seal and finish. The right sealant for each joint is applied and tooled to a neat, even finish.
- Cure and guarantee. We tell you when it can be used, and every job has our one-year guarantee.
What we do in Baldock
- 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: Frame perimeters inside and out resealed with flexible, colour-matched sealant, with backing rod where the gap is deep.
- Commercial & hotel sealant: Hotels, offices, washrooms and welfare areas resealed room by room, with out-of-hours working possible to arrange.
- Remedial sealant & repairs: Second opinions on sealant that keeps failing: we strip it out, check for movement or leaks and reseal it properly.
- Fire-rated sealant: Fire-rated and intumescent sealant around gaps, frames and service penetrations, to the product’s tested details.
- 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: Early-failing sealant in new homes fixed properly, plus mastic packages and snagging 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: Crumbling grout in showers and wet areas raked out and refilled, so water stays out of the wall behind.
- Glazing & conservatory sealant: Glass-to-frame joints on conservatories, rooflights and shower screens cut out and resealed.
- Gutter, fascia & soffit sealing: Leaking gutter joints, end caps, fascia and soffit joints resealed with exterior sealant.
- Sand mastic for sash & case windows: Old sand mastic around sash windows and doors raked out and renewed with traditional burnt sand mastic.
Choosing a mastic man in Baldock
Our approach is simple: take out every trace of the old sealant, prepare the joint properly and use the right product for the job. We have done that for more than 20 years across 2,847+ projects. We are fully insured, we are an ARBOMaster approved applicator, and we work with Arbo and Everbuild sealants. Customers have given us a 4.9-star Google rating from 180+ five-star reviews. You’ll have a clear quote before we begin and a one-year guarantee afterwards.
Places we pass in Baldock
For trains, Baldock station is closest to the centre. Local landmarks include First Garden City Heritage Museum (1.8 miles south-west) and Bygrave House (1.9 miles north-east). Around the centre, our work takes us to homes, rentals and businesses close to Hartsfield Junior Mixed and Infant School, The Knights Templar School, Norton School and Church of St. Mary the Virgin. For open space, Purwell Ninesprings is close by.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“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.”
“New build in Forge Wood — shower seal had failed after 16 months. Mr Mastic came out quickly, removed everything and did it properly. Perfect finish and no more leaks.”
Parts of Baldock we work in
Find your area below, or call 07833 053749 or email us with your postcode and a few details.
Other towns around Baldock
Your questions about mastic work in Baldock
Do you cover all of Baldock?
Yes. We cover the town centre, Clothall Common and the estates around the town, plus nearby Bygrave, Clothall, Weston, Hinxworth and Ashwell.
I live in a Georgian-fronted house in the conservation area. Can you reseal the windows?
Yes. We use flexible or traditional products in colours that suit the frames and brickwork, and keep the joints slim and tidy.
Will you work on the new homes north of Baldock?
Yes. As homes are completed, we can reseal baths, showers and windows where the builder’s sealant has cracked or pulled away.
My shower tray is on a wooden floor in an old building. Why does the seal keep failing?
Timber floors flex, which pulls at the joint. We use a sanitary silicone with good movement and can fill the tray while it cures so it sets under load.
Can you reseal a pub or café kitchen?
Yes. We can work before opening or after closing, and use food-safe products near preparation areas.
Do you reseal Clothall Common houses with uPVC windows?
Yes. We remove hardened mastic, clean the frame and apply a flexible, weatherproof sealant.
How do I book?
Call or send us a message with a few photos and we’ll give you a clear quote and a date.
Can you seal around a conservatory?
Yes. We reseal joints where a conservatory meets the house wall and around its frames, using a weatherproof sealant that can move with the structure.
