Altolead flashing

AltoLead is a high performance, low cost flashing material suitable for use as a lead free alternative for both flat roofing and pitched roofing applications. The product is produced from sheet aluminium with a protective polyurethane coating on top and a polyisobutylene adhesive on the underside. Finished with a dimpled profile this unique construction ensures waterproof, durable and extremely malleable flashings. The polyisobutylene adhesive ensures a strong permanent bond to all building materials without the need for a primer unless a surface is extremely unstable and forming a watertight joint requires no additional tape or sealant.

It is extremely safe to use due to it’s light-weight construction and cutting and shaping is achieved with a knife or scissors that produce no sharp edges. Consequently installation is easy and safe with no health and safety issues.

AltoLead has a 15 year guarantee with a life expectancy in excess of 20 years.

The product does not look like traditional lead and has no re-sale or scrap value, ensuring that theft and vandalism are eliminated.


AltoLead can be installed and worked in any direction using a mallet, roller or by hand. Cutting is achieved with scissors or knife. Before fixing Alto Lead to any building material surface the protective paper should be left in place until the final shape and position is determined. The surface should also be clean and dry to achieve permanent adhesion.

AltoFlex alternative Roofing and Flashing Sealant ensures a flexible waterproof joint that avoids cracking and lack of adhesion associated with the use of mortar … more info

If the building material surface is unstable then a bituminous primer should be applied.

AltoLead should be dressed into the brickwork and sealed and any jointing detail should have a minimum overlap of 100 mm.

Technical Data

Surface finishDimpled / Smooth
Temp. Resistance-40°c / +90°c
Min. working temp.
Life expectancyMinimum 20 years
Guarantee15 years
Corrosion resistanceYes
Resistance to UV DegradationYes

NHBC Standards 2011

NHBC accepts the use of Alto-Lead Flashing, when installed and used in accordance with the BBA Certificate, in relation to NHBC Standards, Part 6 Superstructure (excluding roofs), Chapter 6.8 Fireplaces, chimneys and flues, and Part 7 Roofs, Chapter 7.2 Pitched roofs.