Our Mission

We combine skilled plastering and internal wall insulation to deliver lasting results — improving comfort, energy performance, and finish quality across homes, rental properties, and commercial projects alike. With a sharp eye for detail and a commitment to doing things properly, we’re trusted by homeowners, landlords, and housing providers throughout Chesterfield and beyond.

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Got a question or want a quote? We’re happy to help

What We Do Best

Internal Wall Insulation

Internal wall insulation helps prevent up to 35% of heat loss through solid walls — improving comfort, boosting energy efficiency, and cutting heating costs.

Infographic illustrating how heat escapes from an uninsulated home—highlighting 35% heat loss through walls—used to promote internal wall insulation solutions.

Bay Window Insulation

Cold bay windows are usually the result of single-skin brickwork or timber construction - this can cause damp and black mould. Our internal wall insulation adds a discreet thermal layer inside your bay, helping retain warmth, reduce energy bills, and eliminate cold spots.

Clean, dry bay window area after internal wall insulation installation, showing smooth plastered walls and no signs of condensation or mould.

Condensation/Black Spot Mould

Mould and condensation form when warm, moist air meets cold surfaces — often in poorly insulated areas like bay windows, bedrooms, and bathrooms. We help prevent this by insulating internal walls, reducing temperature differences and moisture build-up.

Visible black spot mould patches growing on an internal wall as a result of persistent damp and condensation.

Soundproofing

Soundproofing helps reduce unwanted noise from neighbouring properties, busy roads, or within your own home. By adding acoustic insulation to walls, ceilings, or floors, we create a more peaceful and private space — ideal for bedrooms, home offices, and properties affected by noisy neighbours.

General Building Work

Need more than plastering or insulation?

We also take on most building work — from renovations to extensions and more — through our trusted sister company.

🔗 Visit JM Building to learn more.

Finished summerhouse with smooth, modern render and clean architectural lines, styled with contemporary Pinterest-inspired design to showcase JM Building’s general building and exterior work.

General Plastering Work

We offer professional plastering services in Derbyshire and South Yorkshire — from patch repairs to full room or property replastering. Our work is clean, crisp, and built to last — trusted by homeowners, landlords and local trades.