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Inspection FAQs

Inadequate Sub-floor Ventilation

Sub-floor Ventilation

A sub-floor is the structure and crawl space between the lowest floor and the ground. High moisture levels in these areas promote fungal decay and other timber pests such as termites.

All sub-floors and crawl spaces should be considered as having potential moisture and water problems. The most common causes for these problems are found on the outside of the house, usually from roof and surface water drainage.

Sub-floors will stay drier if the are built and maintained in the following manner:

  • Yard Drainage – Slope soil around the house in such a way as to divert water away from the house
  • Roof Drainage – Diverting all water from the roof and gutters away from the house. Don’t allow roof drainage to saturate the soil around the foundation of the house
  • Gutter systems need regular cleaning and maintenance
  • Tree limbs also need maintenance but this work needs to be done without damaging the trees. Tree limbs that overhang the roof and gutters make roof and gutter care much more difficult and contribute to drainage problems
  • Gravity drainage is preferable to pumps. Pumps require a lot of maintenance, a constant supply of power and more frequent repairs
  • Drainage System Maintenance – Maintain the roof, gutters, downpipes, and drain systems to assure proper operation
  • In New Construction – Carefully seal the exterior of the foundation; install a quality perimeter drain system, and a separate drainage system for gutters and downpipes.

In addition, sub-floors will remain drier if the following precautions are observed:

  • “Head room” A minimum clearance under beams of 300mm, and under floor joists of 400mm. Larger crawl spaces tend to remain drier; they allow for more air circulation and easier maintenance and repair. 
  • Storage in Crawl Spaces – Most crawl spaces are too small to be used for storage. In addition, the storing of materials in crawl spaces often reduces vitally needed air circulation and creates conducive conditions for rodent and other pest infestation.
  • Venting – There is a considerable amount of dispute regarding the role of exterior venting in keeping crawl spaces dry. In some climates such vents may add moisture to crawl spaces by allowing entry of warm and moist exterior air into the crawl space and increasing moisture through condensation. Most building codes do call for screened crawl space vents.

Subfloor Picture     Subfloor 2 Picture

Subfloor 3 Picture    Subfloor 4 Picture

 

 

 

ABIS building and pest inspections are conducted to the highest standard by building inspectors with a minimum of 10 years experience together with the highest professional qualifications in their field. ABIS has been in business over 27 years conducting both building and timber pest inspections.

Our highly recommended home inspectors are all long term trusted employees not here today gone tomorrow sub-contractors. ABIS Inspectors are supported by a unique computer aided inspection system and the latest inspection equipment such as high sensitivity thermal cameras costing thousands of dollars that others don’t often have.

When you book a pre-purchase inspection with ABIS, our friendly local (they know the area and are not in a interstate or overseas call centre) staff will make the whole process easy for you. Our Office team make all the arrangements with you, your agent, the vendor, the tenant (if there is one) and you will be sent an email to confirm the inspection time along with a pre-engagement letter which covers the scope of the inspection. Good communication and local knowledge are key to you getting the most out of your building and pest inspection. We are always happy to answer all your questions and you are most welcome to be on site when we do the inspection. Our technology, systems and processes also mean you get your high quality report shortly after your inspection is completed.

And all this for an incredible low price.

Service Areas

The Peninsula Moreton Bay Area East Brisbane Redland Bay Area Gold Coast Ipswich Brisbane West Brisbane Northside Brisbane Southside Logan City

ABIS The 1st Choice in Building & Pest Inspections