Everbuild 209 Liquid Mortar Tone - Black 5 Litre 
Everbuild Black Jack 901 Black Bitumen Paint – 5 Litre 
Sika AnchorFix®-1 Fast Cure Anchoring Adhesive System - Light Grey 300ml 
FloPlast Square Line Downpipe Clip White 
Ronseal Diamond Hard Floor Varnish - Clear Satin 5L 
Thompson's Stain Block Damp Seal - White 250ml 
Klober Plain Roof Tile Vent Adaptor - KG990500 
Armatool Slate Guillotone 
Code 8 Cast Lead - 300mm x 6m 
Everbuild Black Jack 908 DPM – 25 Litre 
ALM Code 4 Milled Lead - 450mm x 6m 
FloPlast Square Line Internal Stop End White – 114mm 
Soudal Soudabond 265 Classic Spray - 500ml 
Klober Universal Tile Vent Grey KG9854 (Box of 10) 
ALM Code 3 Milled Lead - 180mm x 3m 
Ronseal One Coat Water-Based Tile Paint - Magnolia Satin 750ml 
Bond It Lightweight Scrim Tape - 48mm x 90m White 
Hambleside Danelaw TV15/4 Tile Vent - Brown (Box of 5) 
Gorilla Wood Glue - Brown 236ml 
Evo-Stik Liquid Nails Solvent Free - Buff 290ml 
Sika Mould Buster – 5 Litre 
Hambleside Danelaw TV15/4 Tile Vent - Terracotta (Box of 5) 
Everbuild 501 PVA – 500ml 
Ronseal Stays White 2in1 Paint & Primer - Gloss 750ml 
Soudal Trade Sanitary Silicone - White 290ml 
Everbuild Firefoam B2 Gun Grade - Pink 750ml 
Soudal Trade Roof & Insulation Foam Genius - 600ml 
ALM Code 8 Milled Lead - 800mm x 3m 
Siroflex Contractors Lead Sheet Silicone - Grey 300ml 
Timloc Universal Roof Slate Vent + Adaptor kit 
FloPlast Half Round External Stop End, Black – 112mm 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.
