Everbuild General Purpose Silicone - Black 290ml (Box of 12) 
ALM Code 3 Milled Lead - 360mm x 6m 
Hambleside Danelaw (HD TVA) Tile Vent Adaptor for TV15 Range 
FloPlast Round Shoe - White 
Everbuild Exact Gap Foam - 750ml 
Thompson's Patio & Block Paving Anti-Slip Additive - 200g 
Bond It Decking Cleaner - Clear 5L 
Everbuild Caulk Once – White 380ml 
Lead Flexi Slate Pipe Flashing - Pitched 
OX Pro Impact Drill & Drive Accessory Set - 40 Piece 
ALM Code 7 Milled Lead - 450mm x 3m 
Bond It B2 Expanding PU Gun Grade Foam - Beige 750ml 
Bond It Patio Seal Paving & Patio Sealer, Clear - 5L 
Bond It PVA & Adhesive Sealer White 1L - Box of 12 
ALM Code 5 Milled Lead - 150mm x 6m 
Klober 20K Slate Vent KG9795-0429 Slate Grey 
OX Tools Pro Plasterers' Hawk - 330mm x 330mm 
Ronseal Stays White 2in1 Paint & Primer - Matt 750ml 
Azpects EASYSeal Sandstone Enhancer and Sealer 5L 
Code 6 Cast Lead - 760mm x 6m 
Ulti-Mate Stonewold MkII Roof Tile Vent - Brown 
Soudal Mitre Kit 50g + 200ml - Clear (Box of 12) 
FloPlast Square Line Offset Bend 112.5° Black – 65mm 
Ronseal Diamond Hard Floor Wax - Natural Oak 2.5L 
Soudaseal Mirror Light Grey, 290ml (Box of 12) 
Bond It Silicone Release Spray - 500ml Clear (Mould Releasing Lubricant) 
Soudal Soudafoam Gap Filler Hand Held 750ml 
ALM Code 6 Milled Lead Flashing - 390mm x 6m 
Ulti-Mate Forticrete SL8 Grey Tile Vent Geotec Felt
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Bond It Dec-Mate Flexible Filler – White EU4
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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.
