Project Overview
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The project centred around a newly constructed home in Beaconsfield, featuring unique barrel top dormers. The aim was to ensure these architectural elements were not only visually appealing but also functionally superior. This involved creating a 50mm airflow to vent the cheeks of the dormers and using correct underlay, all while adhering to the Lead Sheet Association (LSA) guidelines.
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Problem Identification

In new build projects, especially those with intricate design elements like barrel top dormers, ensuring proper ventilation is crucial. Poor ventilation can lead to condensation, which compromises the integrity of the leadwork and the overall structure. Additionally, using incorrect underlay materials can result in inadequate support and protection for the lead, leading to premature wear and potential leaks.

Solution Implementation
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The solution to these challenges involved a series of precise steps, each critical to achieving the desired outcome of both functionality and aesthetic excellence.

1. Creation of 50mm Airflow: The first step was to design and implement a 50mm airflow system to vent the cheeks of the dormers. This ventilation was crucial in preventing condensation and ensuring the longevity of the leadwork.
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2. Installation of Correct Underlay: Selecting and installing the correct underlay was pivotal. The underlay provided the necessary support and protection for the lead, ensuring it could perform effectively over the long term. This step was executed with careful attention to detail to avoid any future complications.
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3. Fitting to Lead Sheet Association Guidelines: The final step was the installation of Code 5 lead, following the stringent guidelines set out by the Lead Sheet Association. Code 5 lead was chosen for its thickness and durability, making it ideal for the vented barrel top dormers. The fitting process involved skilled craftsmanship to ensure that the lead was properly shaped, cut, and installed to provide a seamless and weatherproof finish.

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Detailed Implementation

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Creating the Airflow

The 50mm airflow was achieved by strategically placing vents in the cheeks of the dormers. This required precise measurements and the installation of vent channels to ensure consistent airflow. The aim was to create a system that would allow air to circulate freely, thus preventing moisture build-up and condensation.
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Installing the Underlay

The underlay chosen was specifically designed for use with lead, providing a robust and supportive layer. It was installed meticulously, ensuring that it was laid flat and without wrinkles, which could compromise its effectiveness. This step was crucial in providing a stable base for the lead and protecting it from any rough surfaces that could cause damage.
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Fitting the Lead

Fitting the Code 5 lead involved skilled leadworkers who meticulously shaped and cut the lead to fit the unique contours of the barrel top dormers. Each piece was installed with precision, ensuring a tight fit that would prevent water ingress. The installation followed the Lead Sheet Association guidelines, ensuring that all aspects of the leadwork met industry standards for durability and performance.

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Results and Evaluation
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The completion of this project resulted in beautifully finished vented barrel top dormers that not only enhanced the aesthetic appeal of the new build but also provided robust functionality. The 50mm airflow system effectively prevents condensation, ensuring the longevity of the leadwork. The correct underlay and adherence to LSA guidelines guarantee that the lead will remain in excellent condition, providing a durable and weatherproof solution for the dormers.

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