Ronseal Exterior Multi-Purpose Smooth Finish Filler - Grey 330g 
Everbuild Showerproof Bathroom Silicone – White 280ml 
Soudal Acetoxy Stay Fresh Sanitary Silicone Sealant – Clear 290ml 
FloPlast Half Round External Stop End, Black – 112mm 
OB41 Fast Tack Contact Adhesive Spray - 500ml 
Thompson's Water Seal - 1L 
ALM Code 5 Milled Lead - 180mm x 3m 
Hedgehog Gutter Brush Leaf Guard Black - 4m x 200mm 
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OX Trade Stubby Level - 100mm 
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Timco Straight Tower Bolt Black 6" Gate Bolt 
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Soudal 5 Min D4 Gel PU Wood Adhesive Trade - 290ml 
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Everbuild Black Jack 907 Solar Reflective Paint – 5 Litre 
Hambleside Danelaw Felt Lap Vent 
ALM Code 6 Milled Lead Flashing - 850mm x 3m 
Code 5 Cast Lead - 150mm x 6m 
Everbuild Anchorset Green 150 - Grey 150ml Geotec Felt
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Geotec Felt
Where your lead protects your roof from the weather, Geotec felt protects the lead from the roof. It does this in three ways. Firstly, lead laid nakedly on materials like concrete or stone may be at risk of corrosion, while lead on timber may slowly be leached away by moisture. This may start to damage and destroy the lead layer. Geotec felt serves as an intermediate layer that will guard the lead from moisture or corrosion.
Secondly, Geotec felt decreases drag arising from thermal movement. Lead expands and contracts as the temperature changes it. However, often the materials it is laid on do not. In addition, they may be rough or have an uneven surface. This causes damage as the lead strains against the material holding it up. Geotec felt provides a gentle, smooth surface for lead to thrive on, letting it expand and contract safely.
Thirdly, geotec felt is porous and permits airflow. This allows moisture to be dried out and ventilates the underside of the lead and the topside of the materials the lead would otherwise rest on. This reduces damp, and therefore the chance of rotting or mould. Geotec felt can therefore be an important asset in reducing roof condensation.
