Exclusion and Sealing in Rio Rancho, NM

Where are the openings most often found?

The openings most often found are at the wall base and foundation joints, around window and door frames, at utility penetrations, at vents and at the roofline. Each is checked on every visit, because the building decides which of them is present.

The wall base is the first place to look. Where the siding or the stucco meets the foundation, a gap can open with settling, with age or with a poor first installation. The technician runs a light along the joint and marks any place where light shows through or where the caulk has pulled away. The repair is usually a patch of exterior sealant or a metal flashing piece, and the report says which.

Window and door frames are the second place. A frame that sits slightly out of square leaves a gap at one corner, and the gap often shows on the side of the building that gets the most sun. A door sweep that has worn flat or a threshold that has lifted is a common gap at the base of an exterior door, and a garage door with a worn bottom seal is the same problem at a larger scale.

Utility penetrations are where a cable, a gas line, a water pipe or an air-conditioning line passes through the wall. A penetration with no collar, or with a collar that has been pulled out, leaves a gap around the line. The technician checks each one and seals it with a material that suits the line, and the report says where a line belongs to the utility rather than to the homeowner.

Why is sealing sometimes done in stages?

Sealing is done in stages when closing one gap would push activity to another, or when an opening needs a second look after the first set of repairs. The order is recorded so the homeowner can see why it was chosen.

A technician who seals every gap on the same afternoon can leave an insect inside with no way out, and that insect will then look for a different route. A better sequence is to close the outside openings first, then check the inside, and to close the last openings only when the activity has been seen to stop. That takes more visits, but each visit leaves a clearer result.

A second reason for a staged job is access. A vent that can be reached only from a ladder, or a gap that sits behind a stored item, may need a different visit. The report should say which openings are waiting for access and what is needed to reach them, so they are not forgotten.

What materials are used, and what do they not do?

The materials used for sealing are exterior sealant, expanding foam where it is protected, metal mesh, weatherstripping and door sweeps, and vent screens. Each has a limit, and none of them repairs damage that has already happened to the building.

Exterior sealant suits a joint that moves a little, such as the line between a window frame and its casing. It does not bridge a large gap, and it does not hold up against a gap that opens every season. Expanding foam fills a void around a pipe or a cable, but it breaks down in sunlight and it can be chewed through by a rodent, so it is used only where it is covered or protected. Metal mesh is the choice for a vent or an opening that air needs to pass through, because it keeps the air moving and keeps the animal out.

None of these materials repairs rot, a failed foundation or a crack that is widening. Where the sealing job finds damage of that kind, the report says so and recommends a separate repair. A sealing job that is sold as a structural fix is being sold as something it is not.

What should the homeowner keep after the job?

The homeowner should keep the written list of closed and open points, the material used at each, the date, and any note about access or a repair left for someone else. That list is the record the next technician will need.

The list is the most useful thing a sealing job produces. It tells the next visit where to look, it shows whether the same gap was closed before, and it shows which items were left for a reason. Ask for the list in writing at the end of the visit, and keep it with the house papers.

A homeowner can check the work between visits. Look at the window frames and the foundation joints after a hard week of weather, and note any new gap or any caulk that has pulled away. Send that note to the office with the date, so it can be matched to the list. The check costs nothing and it catches the failures that matter most.