ALGAE REMOVAL & HIGH LEVEL CLEANING

G. Adams Construction - Bettws Lodge, Usk, South Wales

Client's Challenge

During an ongoing building restoration project at Bettws Lodge, significant algae growth was identified on three chimney stacks.

The organic growth had adversely affected the visual appearance of the property and, if left untreated, posed a potential long-term risk to the condition of the chimney masonry. As part of the wider restoration works, G Adams required a specialist contractor capable of safely removing algae at height without damaging the structure or disrupting project timelines.

Assessment & Planning  

APT ICC met with the client on site to review the chimney stacks and assess the extent of algae contamination, access requirements, and surface condition.

The assessment focused on selecting a cleaning method suitable for historic masonry and high-level access, while avoiding abrasive techniques that could damage the chimneys. The proposed method and expected results were agreed with the client prior to works commencing, ensuring alignment with the wider restoration programme.

    Methodology

    The algae removal works were delivered using a controlled, multi-stage process:

    1. Application of specialist algae treatment to break down organic growth on chimney surfaces.

    2. Controlled dwell time to allow effective penetration of the treatment.

    3. Super-heated steam cleaning using long-reach lances to safely clean high-level and difficult-to-access areas.

    4. Progressive inspection to confirm complete algae removal without surface damage.

    This approach ensured effective cleaning while preserving the integrity of the chimney masonry.

    Site Access & Logistics

    High Level Cleaning from APT ICC

    Equipment
    • Super-heated steam cleaning systems
    • Long-reach lances for high-level access

    Chemicals
    • Algae Free – Specialist algae and organic growth remover

    All products used are APT in-house formulations selected for sensitive restoration environments.

    The Results
    • Algae fully removed from all three chimney stacks
    • Visual appearance of the property restored
    • Risk of long-term material degradation reduced
    • Works completed safely and efficiently
    • Project delivered within a single day

    The completed works allowed G Adams to maintain momentum on the wider restoration project and meet programme deadlines.