Professional exterior cleaner using a water-fed pole on a residential property in Hertfordshire

Byrne Shield Clean

DND Exterior Cleaning Limited

Professional exterior cleaning for homes and commercial properties across Hertfordshire. Quiet precision. Visible results.

Get a free quote

Built on clean standards.

Byrne Shield Clean — a trading name of DND Exterior Cleaning Limited — is an exterior cleaning company based in Letchworth Garden City, serving residential and commercial properties across Hertfordshire. We bring considered methods and reliable results to every surface — no shortcuts, no residue. Just clean, protected exteriors that hold up over time.

  • ✓ Method-first approach — technique matched to the surface
  • ✓ Documented before-and-after results on every project
  • ✓ Registered in England — Company No. 17083815
Professional window cleaner washing large glass panels on a commercial building
Crystal clear water droplets macro

What we clean.

Each surface demands a specific approach. We match the method to the material.

Popular

Pressure Washing

High-performance cleaning for driveways, patios, paths, and hard surfaces. Built-up grime, moss, and discolouration removed methodically.

From £4 /m²

Roof Cleaning

Soft-wash treatment that clears moss, algae, and lichen without damaging tiles or slate. Thorough, low-pressure, surface-safe.

From £350

Gutter Cleaning

Full clearance of debris, blockages, and overflow residue. Downpipes checked and flushed as standard.

From £75

Facade & Render Cleaning

Exterior walls and render restored to their original tone. Algae, pollution staining, and weathering addressed with the correct chemical process for each substrate.

From £5 /m²

Popular

Window Cleaning

Pure water fed-pole system for streak-free results at height. Frames and sills included.

From £25

Driveway & Patio Restoration

Deep cleaning followed by re-sanding and optional sealant application. The finish lasts, not just the first impression.

From £5 /m²

Free Consultation

Not sure what your property needs? We assess the surfaces, recommend the right approach, and provide a detailed no-obligation quote — at no cost.

Free

Recent work.

Surfaces restored. Standards maintained.

Before After Conservatory roof before cleaning — grime and algae buildup on panels Conservatory roof after cleaning — panels restored to bright white

Conservatory roof — full panel and frame clean restored.

Before After Patio slabs before cleaning — dark staining and moss growth Patio slabs after cleaning — original tone restored

Patio slabs — heavy weathering cleaned and natural colour restored.

Before After Rendered wall and patio before cleaning — green algae and dark staining Rendered wall and patio after cleaning — clean render and fresh paving

Rendered wall and paving — algae and staining removed.

Before After Window before cleaning — smudges and grime on glass and frame Window after cleaning — streak-free glass with clear reflection

Window cleaning — frames, sills, and glass cleaned to a streak-free finish.

Fascia board before and after cleaning — dirty fittings restored to white

Fascia and soffit — grime and weathering cleaned from uPVC.

Gutter and fascia before and after cleaning — moss and staining cleared

Guttering — debris, moss, and overflow staining fully cleared.

Get in touch.

Send us the details. We respond within 24 hours with a clear, no-obligation quote.

[email protected]
+44 757 5526 324
17 Chasten Hill, Letchworth Garden City, England, SG6 4YN

Please enter your name.

Please enter a valid email address.

Please enter a valid phone number.

Please select a service.

Please describe your project.