Attic project, Ventilation questions
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 Aug 9 2020, 05:00 PM
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#1
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Junior Member
225 posts Joined: Nov 2017 
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from design standpoint, i would be more concerned with the supporting beam at 1F. Your plan shows 12.5ft to edge of the patio area but your 1st floor attic plan is 20ft. That makes the patio area 7.5ft. That makes the existing roof beam at 5ft. Seems to me there is a mistake in measurements.
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Aug 9 2020, 11:46 PM
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#2
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Junior Member
225 posts Joined: Nov 2017
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QUOTE(Zaryl @ Aug 9 2020, 11:28 PM) Actually, the dimensions are as follows: ok I misunderstood your section plan as floor plan for attic. what sort of roof do you plan to do? what sort of floor would the attic have? 9ft seems too low if you have 1ft rafter or beam.how do you plan for your existing beam or column to take the new load. As a guide, UBBL requires 10% floor area as openings/ventilation. I can comment if I know more details on what you plan to do.Length: 12.5 ft Width: 10 ft Height: 20 ft So, do you think a 9 ft height at the 1F attic would be sufficient? Ventilation wise?  |
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Aug 10 2020, 03:05 AM
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#3
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Junior Member
225 posts Joined: Nov 2017
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QUOTE(Zaryl @ Aug 10 2020, 12:19 AM) For roof, i won’t modify anything as i just use the existing built (outside roof using typical ceramic roof tiles) i assume your plywood floor would be supported by rectangular hollow section @2ft spacing as rafters? The RHS to sit on the brickwall? space constraint on the windows height would interfere with the window lintel and rafters. how do you plan to support the plywood flooring? I think your attic would be a hot area.My attic will be using thick plywood with vanish finishing for the floor. For ventilation on 1F, there is a sliding window. But for ventilation on GF, i would like to seek your opinion: how big should i design for the rectangular ventilation window? 1.5 ft by 1 ft is fine? Just want to bring all the heat out to my living room area. FYI, ventilation for GF is one of the main questions i asked in this thread earlier. You may refer to my simple attic plan sketch to get the general idea. Thanks for your input btw. as mentioned 10% floor area would probably need 12.5 ft2 of window min. 1.5 ft2 is definitely not enough. Louvered windows dont look good. Fixed glass defeats the purpose of ventilation. The practical way I see is fixed glass with mechanical ventilation. |
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Aug 10 2020, 02:22 PM
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#4
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Junior Member
225 posts Joined: Nov 2017
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QUOTE(Zaryl @ Aug 10 2020, 10:21 AM) The floor support beam will done something like this: ok understood. you consider the floor height is reduced with the RHS column say 1.5-2ft? Means your GF height is prob under 9ft I was thinking of installing this type of ventilation window  |
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