Mastic man in Hatfield

Resealing and mastic work across Hatfield

Hatfield is really two towns side by side. Old Hatfield grew up around the gates of Hatfield House, while the new town was designated on 20 May 1948 and built over the following decades, with its own centre on St Albans Road. Add the housing that went up on the old de Havilland site after the factory closed, and you get homes from almost every decade of the last 75 years within a short drive of each other. Mr Mastic covers all of it from our base in Crawley.

We reseal baths, showers, basins and kitchens, cut out and renew mastic around windows and doors, and seal the outside joints where frames meet brick or panels. The method doesn’t change from house to house: the old sealant comes out completely, the joint is cleaned and dried, any mould is treated, and only then does new sealant go on. Where tired grout is part of the problem, our regrouting service can be done on the same visit.

Roe Green, South Hatfield and the aerodrome homes

Roe Green was the first neighbourhood of the new town, completed by 1955, and South Hatfield followed. The first block of flats at Pondcroft opened in May 1954. Those early homes were built during a national brick shortage, so on many of them only the party walls carry the load and the front and back walls are lightweight insulated panels. Some “Swedish” style houses have timber-fronted upper storeys over brick. Walls like these move differently from solid brick, and the joints where panels, cladding and window frames meet open and close through the year. A hard, old mastic can’t follow that movement, so it splits. We replace it with a flexible exterior sealant, using backing rod where the gap is deep.

Inside, most of these houses have had their bathrooms and kitchens refitted at least once, often more. We regularly find layers of sealant from different decades, baths that have dropped slightly on their feet, and worktop joints that have shrunk back from the wall.

The former aerodrome is a different story. After the de Havilland factory closed in the 1990s, about 2,000 homes were built on the site alongside a business park and a university campus. Many of those homes are now old enough that the original sealant has reached the end of its life. In Old Hatfield, period buildings near the Old Palace have walls that are rarely straight, so a joint needs a product chosen for the gap rather than a standard bead.

What we do in Hatfield

• Bathroom & kitchen resealing: Baths, showers, basins, wet rooms, worktops and sinks: old sealant cut out, mould treated and a new bead of anti-fungal silicone laid.
• Window & door mastic: Cracked or shrunken mastic around window and door frames, sills and patio doors replaced with a weatherproof sealant.
• Commercial & hotel sealant: Sealant programmes for offices, hotels, care settings and schools, with early or late working where it helps.
• Remedial sealant & repairs: Messy, layered or wrong-product sealant cut out and replaced with the right sealant, laid the right way.
• 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: Failed builder sealant in new homes put right, and plot mastic for developers.
• Floor & skirting joints: Movement joints in tiled and concrete floors, and skirting gaps, sealed so they stay tidy and keep dirt out.
• Regrouting: Shower and splashback grout replaced where it has cracked or stained, with silicone in the movement joints.
• 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: Traditional sand mastic for period windows and doors where a modern sealant would look out of place.

Why Mr Mastic in Hatfield

Hatfield’s mix of panel-built houses, student lets and newer homes needs someone who looks at each joint before reaching for the gun. Mr Mastic has more than 20 years’ experience, carries full insurance and is an ARBOMaster approved applicator, using Arbo and Everbuild sealants. We’ve finished over 2,847 projects and hold a 4.9-star Google rating from 180+ five-star reviews. You’ll get a clear quote before any work starts and a one-year guarantee once it’s done.

Around Hatfield

From the centre, the nearest railway station is Hatfield station. Well-known places nearby include Howard Centre (2.9 miles north-east) and The Bunker at Hatfield Police Station (less than half a mile north-west). Typical jobs near the centre are in homes and businesses around Bishop's Hatfield Girls' School, Church of St Luke, The Cat and Fiddle pub and Stanborough Park. Green spaces within reach include Colney Heath Local Nature Reserve.