For many customers, entering through an exterior wall may not actually be the most convenient location for your cable penetration. That's why we always recommend first assessing alternative entry points like windows. Windows often provide an easier path that reduces the risk of complications versus drilling through a wall.

Is there a window positioned near the planned cable termination point inside? Do you have easy access to the window inside and outside for troubleshooting now and in the future? If you have a suitable window, you’ll want to check out our Waveform Window Entry Cable.

When running cable, following some simple best practices will help ensure your installation withstands the test of time. Taking the time to plan, inspect for safety concerns, choose an optimal location, and create a robust seal will protect both your house and your system's performance. A few extra minutes of care during installation can translate to years of worry-free operation. This section outlines some tried-and-true practices proven to limit any damage to your building. 

Evaluate the easiest penetration routes. While minimising signal loss from long cables is important to system performance, if a few extra feet are needed, choosing a simpler path over a baseboard, window or soffit may prove less frustrating than struggling with a difficult hole location.

Proper drip looping is key to prevent water ingress. Create at least a 6" upside-down U shape of excess cable extending past the penetration point. This keeps water droplets from traveling down cable sheaths straight into your hole.

It’s also important that the cables should exit the wall at as steep a downward angle as possible.

Always check for existing wiring and plumbing first. Use a wire probe, borescope or voltage detector to search for any unexpected cables, pipes or studs behind the wall before drilling. It's also important to inspect above and below the intended penetration point, as lines may run horizontally. Probing the entire path is critical. Accidentally cutting or puncturing an active electrical line or pressurized plumbing system can pose serious safety hazards, damage equipment, and result in costly water damage to your home. Bathrooms, kitchens, and exterior walls should warrant extra caution, as plumbing like supply pipes and drain stacks are often located within these areas. 

Finally, focus on complete waterproofing of your sealed entry point. Penetrations allow a direct path for moisture inside if not done right. Choose durable sealing materials rated for exterior use and follow proper application methods detailed below. A thorough job here is worth the time investment to protect your equipment and your home long-term.

Taking time with careful planning and precision execution at each step pays off in longevity and low-stress results.

To fully protect a cable wall penetration, choosing the right sealing materials makes a big difference. 

Cable grommets are an excellent first line of defense, especially for penetrations located lower like through basement walls. Made of rugged rubber or metal, grommets fully enclose cable ends once inserted into a pre-drilled hole. Look for grommets rated for exterior walls and designed to flex with cable movement over time. They create a clean factory-sealed appearance. We recommend Icotek cable grommets.

Silicone sealants can seal tight spaces that other products can't. Application is simple - just cut the tip, insert the nozzle or straw, and gun sealant directly into holes or gaps. Make sure any sealant is UV and weather-resistant labeled for long-lasting use outdoors.

For most Waveform customers, following the techniques described will allow you to complete a durable DIY cable penetration project with confidence. However, certain wall types may require specialized expertise beyond a homeowner installer.

Complex buildings with stucco, brick, or poured concrete facades can pose challenges even for professionals. Thick masonry walls may need careful core drilling or saw cutting to penetrate properly. Historic homes with older plaster or lath-and-limewall constructions also necessitate more delicate techniques to avoid damaging original integrity. Walls with siding or exterior insulation and finish systems (EIFS) may warrant extra consideration for waterproofing as well.

If your specific wall structure or local building codes suggest contacting a licensed low-voltage contractor, it may be worth the investment for guaranteed workmanship. Experts have on-the-job experience to troubleshoot issues, identify risks you may miss, and complete the job properly and safely the first time. For complicated scenarios or large enterprise settings, professional expertise may make sense for you.