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Best Types of Crawl Space Insulation for Tacoma Residents

Tacoma homes are regularly exposed to varying moisture levels in addition to the natural summer and winter weather conditions. Without adequate or appropriate crawl space insulation, air and heat can be allowed to travel through the walls, reducing a home’s energy efficiency. In addition, crawl spaces that are not properly cleaned out and insulated allow moisture and water to enter the crawl space, increasing the chances for mold and mildew growth that can damage the integrity of the house’s structure and affect the home’s air quality.


In order for homeowners to ensure that they have optimal energy efficiency, safe air to breathe, and a sturdy structure, a thorough cleaning and insulation of the crawl space is required. There are a variety of crawl space insulation materials available on the market today, three of which are best to insulate crawl spaces in the Tacoma area.

3. Fiberglass Insulation

Fiberglass insulation is normally installed in large segments of insulation called batts. These large pieces are rolled out to create a giant blanket of insulation against walls, ceilings, or flooring. When installed in crawl spaces, fiberglass insulation is normally installed in the ceiling to provide a protective layer between the house and the crawl space.


Fiberglass insulation is a great way to cover large sections of space. It is also among one of the more inexpensive insulation options on the market today.


Fiberglass insulation is a soft, spongy material. When placed in unsealed, moist crawl spaces, the insulation will quickly absorb the surrounding moisture and loose its ability to insulate. If Tacoma homeowners are considering the use of fiberglass insulation in their crawl space, it is recommended that they first find a crawl space expert that can inspect, clean, and seal their crawl space thoroughly.

2. Foam Board Insulation

Foam board insulation is comprised of polystyrene, a transparent thermoplastic material similar to styrofoam. These boards can be cut and shaped into different sizes and placed in just about any part of a house. Normally, they are used to prevent the transfer of heat through structural elements like wood or steel Contact for similer services.


Unlike fiberglass insulation, these foam boards generally deter water and are relatively effective at blocking the transfer of heat. Foam board insulation is also among the less expensive insulation options, and it is somewhat water resistant, blocks heat transfer well, and is marginally inexpensive.


Even though foam boards are water resistant, water can still get trapped between large sheets of foam board and wooden walls. When this happens, there is no air circulation to prevent the growth of mold or mildew that can result in wood rot. In addition, these large chunks of foam are not designed to fit in and seal small cracks or holes, leaving these areas free to continue transferring heat and energy.

1. Spray Foam Insulation

Spray foam insulation is an organic compound made from two composite materials. When these two materials are combined, they create an expansive substance that fills cracks, nooks, and crannies before curing.


Spray foam insulation has an an unusually high R-value, making it one of the most powerful insulators available on the market today. Once the substance has been sprayed and allowed to harden, it seals any cracks or holes, provides structural reinforcement, and can keep a crawl space thoroughly insulated for over 10 years.

Spray foam insulation is known for its water resistance, making it an excellent candidate for Tacoma homes that must endure extensive rain and moisture exposure. The materials that make up spray foam insulation provides no sustenance for mold spores, and the spray foam material is universally unattractive to pests and other critters that might try to nest in the crawl space.


While incredibly powerful and durable, spray foam can be expensive to install. However, studies have shown that the installation of the insulation will eventually pay itself off with the incredible energy savings that homeowners enjoy, year after year.
At Clean Crawls, we offer crawl space inspections, cleaning, restoration and insulation services so that Tacoma families can enjoy a comfortable home environment, higher air quality, and great energy savings. For more information about our services, feel free to give us a call, or fill out our contact form.

Clean Crawls
3707 124th St NE Marysville, WA 98271
(360) 651-1765

Instruments And Techniques Of Educational Evaluation

Assessment instruments and methods are the tools used by the teacher to obtain evidence of the students’ performances in a teaching and learning process.

The instruments are an aid to obtain data and information regarding the student, so the teacher must pay close attention to the quality of these as an inappropriate tool distorts reality.

The teacher requires qualitative and quantitative information for which he uses the most representative instruments with their methods, that is, the test that most appropriately applies to the student’s abilities, the subject to be evaluated, and gives the results that the teacher needs to establish the level of student learning.

The techniques refer to the method of evaluating and the instrument for the type of test. For example: in the interrogation technique, the tools or checks can be the questionnaire, the interview, and the self-evaluation. That is why the teacher must select the Evaluation Techniques and Instruments that contribute to guaranteeing the permanent construction of learning.

Evaluation Techniques And Instruments Provide Us With Valuable Information.

The evaluation cannot be reduced to verifying the results but must expand its field to provide students with information about their learning, and to the teacher elements of analysis of their teaching practice. The evaluation is a fundamental element of the research – action that must be carried out in the classroom, and that is a requirement of the teacher’s role.

  • – To evaluate the acquisition of the conceptual contents, instruments will be used that inform us about the level of assimilation of those contents: verify that the student can identify, recognize, classify, compare, explain, remember, enumerate, apply, etc. Actions in which the student shows the learning of a concept, a fact, or a principle.
  • – To assess the mastery of procedural content, we must use instruments that allow us to verify how the student is acquiring specific skills: check how the student can handle, manipulate, build, use, reconstruct, test, execute, move, simulate, etc. Attitudes in which the student manifests the domain achieved in the field of procedural content.
  • – To assess the development of attitudinal materials and values, we need observation instruments that allow us to appreciate the evolution of the student concerning behavioral and attitudinal aspects. Observe how the student is achieving habits of respect, tolerate, share, understand, accept, realize, sensitize, correspond to behaviors in which the student shows the possession of attitudes and values ​​that are part of the attitudinal contents.

Evaluation process and instrument selection

The challenge is, then, in developing evaluation strategies that respond, in particular, to integration and interpretation of knowledge and a transfer of said knowledge to other contexts. Read More Premium Graduate Placements

Eisner (1993, pp. 226-232) raises some principles that we believe are relevant to take into account to better understand the process of evaluation and selection of instruments. For him, the assessment must:

  • · Reflect real-world needs, increasing problem solving, and meaning building skills.njsleep
  • · Show how students solve problems and not only attend to the final product of a task since the reasoning determines the ability to transfer learning.
  • · Reflect the values ​​of the intellectual community.
  • · It should not be limited to individual execution since life requires the ability to work in a team.
  • · Allow having more than one way of doing things since real-life situations rarely have only one correct alternative.
  • · Promote the transfer of tasks that require learning tools to be used intelligently. Require that students understand the whole, not just the parts.
  • · Allow students to choose a form of response with which they feel comfortable.

Evaluation techniques

To the extent that the planned objectives are achieved, we can limit the use of objective tests and traditional exams as the only tools to evaluate students. Observation, interviews, quizzes, surveys, etc. They should be used to the extent that they provide the teacher with a continuous and adequate knowledge of the student’s progress and allow him to assess the quality and degree of learning at all times.

Some evaluation instruments are:

  • * Estimation scale
  • * Tests
  • * Briefcase
  • * Projects
  • * Monographs, etc.

Procedures for selecting and developing evaluation techniques and instruments

  • * Identify the purpose
  • * Define the contents
  • * Select method
  • * Prepare the instruction
  • * Prepare the test or tool
  • * Test application
  • * Correction of the answers or elaborated products.

Should traditional exams be changed?

Critics argue that traditional fixed-response exams do not give a clear and truthful view of what students can bring with their knowledge, they only allow to recall, observe the understanding or interpretation of education but do not demonstrate the ability to use instruction.

Frequently the result of the evaluations is used only to award a note to the participants and not re-enter the teaching and learning strategies to improve the efforts.

Education depends on the development of a country, so teachers are key players in the advances in the teaching-learning process.

To optimize knowledge about evaluation techniques and instruments, we invite you to our Master in Evaluation and Accreditation of Educational Quality.