Parson G90 15 ft. 7 in x 18 ft 8 in Log Cabin D.I.Y. Building kit | Hud-1 EZ Buildings The Parson G90 glulam timber building kit is an excellent design to provide a large amount of open space to utilize as a pool house hobby room guest house work shop. The Parson G90 offers a glulam log that is 3-1/2" thick R 13 rated and is 15 ft. 7 in. x 18 ft. 8 in. 295 sq. ft. of space, 2360 cu ft of total interior area. The Parson G90 offers an easy assembly project for the D.I.Y. that would like to add some extra space without the expense and hassle of a room addition. The building is shipped direct to you via curbside. Roofing shingles are sold separately.