Category Archives: Building

2015 Washington State Residential Energy Code – Insulation mark

The 2015 Washington State Energy Code (WSEC)  requires R value identification on all batt insulation over 12” in width.  There are several code sections that reference R value identification.  The first is R303.1.  which requires all equipment, materials and systems … Continue reading

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Filed under Building, Energy Conservation

2017 NFPA Code LP-Gas storage locations

The 2017 NFPA 58 provides requirements for LP-Gas containers.  Location distances to various objects including lot lines, structures, ignition sources, power lines, other tanks, etc. can be found in chapter 6. Specific distance requirements to building openings and ignitions sources … Continue reading

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Filed under Building, General, Safety

2015 Residential Code for roof drip edge flashing

The 2015 International Residential Code (R905.2.8.5) requires the use of drip edge flashings on eaves and rake edges of shingled roofs.  The flashing should extend a minimum of ¼” below the roof sheathing and 2” back onto the roof sheathing.  … Continue reading

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Filed under Building, Framing

2015 Residential Code for Asphalt Shingle fasteners

The 2015 International Residential Code (R905.2.5) lists requirements for nails used to fasten asphalt shingles to the roof.  The nails must be galvanized steel, stainless steel, aluminum or copper.  The shank shall be a minimum of 12-gage.  The nail head … Continue reading

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Filed under Building, Framing

2015 Update – Residential Code update for foundation anchorage

The following information deals with changes from the 2012 International Residential Code to the 2015 International Residential Code. The 2015 International Residential Code (R403.1.6) now requires anchor bolts to be located within the middle third of the width of the … Continue reading

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Residential Code requirement for draftstop

The 2012 International Residential Code (R302.12) requires a draft stop in combustible construction when there is a concealed space between floors. This condition is often found in homes that utilize a floor/ceiling girder truss system in lieu of solid lumber … Continue reading

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Residential Code requirment for fire resistant exterior wall projections

The 2012 International Residential Code (R302.1) sets requirements for exterior walls, openings and projections in regards to fire resistant construction. The first step in determining if a fire rated assembly is required depends on whether the home is equipped with … Continue reading

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Residential Code requirment for attic venting

The 2012 International Residential Code (R806.1) requires the venting of enclosed attics and rafter spaces. The appropriate amount of cross ventilation (R806.2) can be achieved by the installation of openings at a rate of one square foot for every one … Continue reading

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Residential Code requirement for fireblocking between floors

The International Residential Code (R302.11) requires fireblocking at six specific locations in wood framed construction.   The first location identified in this section is concealed spaces between stud walls and partitions; which also includes furred spaces.  Fireblocking is required vertically at … Continue reading

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Residential Code requirment for floor joists

The Residential Building Code (R502.6.1) requires floor joist to be lapped a minimum of 3 inches when located over a bearing support.   The two opposing joists should be nailed together with a minimum of 3 nails.  The nails must be … Continue reading

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Residential Code requirement for footing drains

The Residential Building Code (R405.1) requires footing drains around all foundations that retain earth, and enclose habitable or usable space located below grade.  Several different materials can be used for drains including; drainage tiles, gravel or crushed stone drains, perforated … Continue reading

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Residential Code requirement for gypsum & tile

The Residential Building Code can be a little tricky when it comes to where gypsum products can and cannot be used within a home.  Contractors as well as homeowners are often faced with a variety of interior wall products which … Continue reading

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Filed under Building, General

Residential Code requirement for safety glass near doors

As mentioned in previous posts, the International Residential Code (R308.4) stipulates when safety glass must be used throughout a home.  The code includes seven specific locations where safety glass is required. Section R308.4.2 addresses glass which has been installed near … Continue reading

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Residential Code requirment for ceiling height

The Residential Building Code (R305.1) provides minimum ceiling height limits based on the use of a room. All habitable rooms, hallways, and bathrooms must have a ceiling height of 7 feet.  This includes basements which contain the previously mentioned spaces. … Continue reading

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Residential Code requirement for protection of wood in crawl space

The Residential Building Code requires wood to be protected from decay at seven locations around a home.  Protection can be accomplished by certain species of wood which are naturally resistant to decay, or by the use of wood preservatives.  Wood … Continue reading

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