What is mastic lapping tape for?

Mastic Butyl Tape is a cost effective solution to sealing and water proofing your end lap joints for your roofing sheets and flashings.

What is lap tape?

Product Overview. Novia Breather Membrane Lap Tape is a sealing and bonding tape suitable for sealing laps on external breather membranes within both roof and wall applications. It should normally be used in conjunction with Novia Double-Sided Adhesive Lap Tape for a fully sealed and airtight membrane installation.

What is the usual side lap for corrugated roofing?

The product must be overlapped at the sides, not less than 1.5 corrugations. It is generally considered good practice to use fasteners along side-laps; however, when cladding is supported as indicated in maximum support spacings, side-lap fasteners are not usually needed for strength.

What is butyl tape?

What Is Butyl Tape, Exactly? Butyl tape is an example of a synthetic rubber adhesive. It’s a solvent-based adhesive that is formulated in the lab instead of coming from a rubber tree. All types of rubber adhesive are thermoplastic, so exposure to high heat will soften the adhesive and impact its effectiveness.

Should you tape breather membrane?

To ensure maximum efficiency, all joints in the membrane should be properly sealed with tape so as to prevent accidental air-leakage.

How much should a corrugated roof overlap?

Corrugated sheeting should always overlap by a minimum of one corrugation, this can be known as side laps. When overlapping corrugated sheeting its advised you use cladco lapping tape. For maximum sheet lengths in corrugated, we can supply 5m in a 0.5mm thickness and up to 6m length in the 0.7mm thickness.

What is the difference between butyl tape and putty tape?

Butyl tape is hard to break and will continue stretching. In contrast, putty tape will snap, often leaving a jagged edge behind.

Is butyl tape better than silicone?

In general, butyl rubber is a preferred material for mechanical goods, hoses and construction sealants. Silicone is more diverse in its utility, and is commonly used on a smaller scale. In addition to tire tubing, it is present in many cooking utensils and computer keyboards.

Where does butyl tape go?

Butyl tapes can be applied to single-skin metal panel seals, end laps and side laps, and also under roof curbs, under fasteners and other applications where the butyl tape is covered and not exposed to ultraviolet (UV) light and weathering.

What tape do you use for breathable membranes?

Novia Breather Membrane Lap Tape is a sealing and bonding tape suitable for sealing laps on external breather membranes within both roof and wall applications. It should normally be used in conjunction with Novia Double-Sided Adhesive Lap Tape for a fully sealed and airtight membrane installation.

Can you double up breathable membrane?

Yes, but the Tyvek® roof membrane should be installed in two layers (double felted) with staggered laps. Can Tyvek® be dressed into the gutter as in traditional practice? This is a UV resistant eaves sheet such as Tyvek® Eaves Carrier that replaces the membrane as the ‘drip’ into the gutter.

Does breathable membrane need an air gap?

Do you need a 25mm air gap under the membrane? Although this is often considered standard practice, it is not a requirement; the important thing is that the drape in the breather membrane (which allows any water getting through the tiles to channel down to the gutter) should not be pushed out.