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Should lead flashing be over or under tiles?

Should lead flashing be over or under tiles?

Normally, lead flashings should not exceed 1.5m in length, with laps of not less than 100mm. Flashing should be tucked into a mortar joint 25mm deep and at least 75mm above the tiling level and lead wedged into place.

What are the codes for lead flashing?

Find Out Which Lead Code you Need

Code Thickness (mm) Recommended use(s)
Code 6 2.65 Flashings, pitched and tapered valley gutters, dormers and flat roofs
Code 7 3.15 Pitched and tapered valley gutters, dormers and flat roofs
Code 8 3.55 Pitched and tapered valley gutters, dormers and flat roofs

What is the difference between Code 4 and Code 5 lead flashing?

Code 5 lead is by far the most versatile and can be used in the same fashion as code 4 except for as a soaker. This lead can also be used for flat and pitched roofs.

How far should lead flashing go in brick?

lead flashings should have a minimum lap of 100mm. flashings should be tucked 25mm into a brick joint and wedged in place at not more than 450mm centres, or a minimum of one per step for stepped flashings.

How thick should lead flashing be?

Lead Flashing Codes and Weights This means is should weigh approximately 4 pounds (lb) for every square foot. It is 1.8mm thick, as it should be, and 240mm wide.

What is the difference between Code 3 and 4 lead flashing?

Lead codes are actually very simple. Ranging from Code 3 to Code 8 they separate lead into different thickness and weight….What Are Lead Codes?

Lead Code Thickness (mm) Weight (kg per square metre)
Code 3 1.32mm 14.97kg
Code 4 1.80mm 20.41kg
Code 5 2.24mm 25.40kg
Code 6 2.65mm 30.10kg

How much lead flashing do I need?

The minimum recommended depth for lead roof flashing to be set into a chase is 25mm, but remember that this is roughly a quarter of the width of the remaining mortar. This is fine unless the brickwork becomes unstable, which may result in a need to reduce the depth.

How to fit lead flashing on your Conservatory?

How To Fit Lead Flashing On Conservatory 1 Mortar Removal Removing the mortar between the brickwork and conservatory roof is an essential part of the installation. 2 Roll Out The Flashing Although some people prefer to measure the flashing with a tape measure and cut it to size beforehand, the easiest way to roll out the 3 Sealing

Do you have to remove mortar to put flashing on Conservatory?

Removing the mortar between the brickwork and conservatory roof is an essential part of the installation. You’ll need to either use a hammer and chisel to remove the mortar to a depth of approximately 15 to 20mm. Ensure you remove mortar on all areas where you want to add flashing, including above windows and doors that back on to an external wall.

How do you put lead flashing on a lean to roof?

For lean-to or flat roof conservatories (i.e. a roof that slopes outwards), a singular long line of mortar between two layers of bricks needs to be either chiseled or grinded out to a depth of around 25mm. Make sure this line isn’t too high above the roofing bars, and that there’s enough room to fit the lead flashing sheet sufficiently.

What can I use to fill in a gap in lead on a conservatory?

Once your flashing is secured you will then need to fill in the open chase with mortar or alternative lead sealing product. Tap the very top of the lead down using a bolster and then begin filling in the gap using a trowel. Be sure to fill the entire cavity depth as not doing so can lead to leaks down the road.