Hambleside Danelaw Double Plain Tile Vent, TV10/9 - Slate Grey (Box of 5) 
ALM Code 7 Milled Lead - 390mm x 3m 
Everbuild Industrial Superglue HV - Clear 50g 
Bond It Bitumen Primer - Black 1L 
Soudal Exterior Frame Silicone - Brown 270ml 
Easy-Trim Universal Dry Verge Unit - Black 
Soudal Trade Roof & Insulation Foam Genius - 600ml 
Ronseal One Coat Stain Block - White 2.5L 
Klober Profile-Line Twin Plain Tile Vent - Slate Grey KG9861-0429 (Box of 10) 
Code 8 Cast Lead - 210mm x 3m 
Ronseal Exterior Yacht Varnish - Satin 500ml 
Hedgehog Gutter Brush Leaf Guard Black - 4m x 200mm 
Code 5 Cast Lead - 850mm x 6m 
Hambleside Danelaw Single Pantile Roof Tile Vent, TV10/8 - Slate Grey (Box of 5) 
ALM Code 3 Milled Lead - 210mm x 3m 
Timloc 1206 Underfloor Vent Horizontal Rear Extension + 100mm 
Ronseal Anti-Condensation Paint - White 2.5L 
Cromar Vent 3 Classic Breathable Membrane - 1m x 50m 
EVO-STIK Sticks Like All Weather Adhesive - Clear 290ml 
Code 4 Cast Lead - 1200mm x 3m 
OX Trade 3 Piece Paint Brush Set - 25/38/50mm 
Bond It Dec-Mate Flexible Filler - Magnolia EU3 
Soudal Firecement HT, Black - 300ml (Box of 12) 
Timloc Inline Slate Vent Black Geotec Felt
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Code 7 Cast Lead – 1200mm x 6m
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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.
