Building Out Bugs: Isolation Joints

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Hello and welcome to another week of the TERM® Barrier System blog series! This week we will be continuing our summer blog series titled Building Out Bugs by highlighting a way you can block pests from entering the home through the horizontal isolation joints. As part of the TERM Barrier System, Polyguard has developed an isolation joint product specifically for exclusion in this difficult area.

Author, Cassie Krejci, Ph. D.

Author, Cassie Krejci, Ph.D.

TERM® Isolation Joints

Isolation joints are generally formed with materials such as junk board, fiberboard, or foam, among others. These materials have worked well for the intended purpose, but when considering termite and pest exclusion, they are ineffective. Termites can utilize isolation joints to access a structure. As we all know, damage from alate termites (swarmers) or foraging termites can be expensive.

TERM® Barrier for Isolation Joints

TERM Isolation Joint Barrier is a “peel and stick” termite barrier composite used for sealing isolation joints before pour of a new slab which butts against an interior slab. The TERM Isolation Joint Barrier is a non-structural barrier which, when properly constructed as part of the building envelope, acts as a barrier to termites entering the structure through isolation joints.

The TERM Isolation Joint Barrier is easy to install. The follow is an example of how the TERM Isolation Joint Barrier would be installed on the face of slab located at the garage where the future driveway would be poured.

First, the surface is cleaned with a wire brush and primer is applied to the concrete. The TERM Isolation Joint Material is then pressed into place against the concrete.

TERM® Barrier for Isolation Joints

Use a roller to ensure contact with the vertical concrete surface.

TERM® Barrier for Isolation Joints application

When the new concrete is ready to be poured, simply unfold the micro mesh component from the TERM Isolation Joint Barrier at a 45° angle and peel off the release liner. Newly-poured concrete will bond to the isolation joint material and the micro-mesh will be embedded into the concrete.

TERM® Barrier for Isolation Joints

This innovative new product will prevent termites from gaining access through this isolation joint.

The TERM Isolation Joint Barrier consists of a laminated elastomeric membrane which has a TERM Sealant Barrier adhesive on both sides. Total thickness of the TERM Isolation Joint Barrier is a nominal 0.5” (12.7 cm). The exposed adhesive faces of TERM Isolation Joint Barrier are covered by a disposable treated release sheet, which can be peeled away to expose the adhesive face. Roll width is 2” (.102 cm). Length is 25’’ (2.44 m). Embedded within the TERM Isolation Joint Barrier is a 4” wide stainless steel screen, with aperture opening of 0.018” (0.465 mm). Polyguard 650 LT Liquid Adhesive is required for installation.

It’s important to note that the TERM® Isolation Joint Barriers are intended for new construction.

TERM Isolation Joint Barriers are a component of the pesticide-free TERM Barrier System which, when properly installed as part of the building envelope, acts as a barrier to almost all pests.  Because almost all pests are excluded for the life of the structure, the need for pesticide treatment should be permanently and drastically reduced.

To inquire about TERM® Isolation Joint Barriers for your next home or building project, or for additional information on the TERM® Barrier System products, please feel free to email me at ckrejci@polyguard.com.

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