Depends on roof and ceiling mass kg m2 below are only typical roof construction examples and may differ in your situation i didn t include tiled roofs which are higher numbers metal sheet tiles or medium gauge corrugated iron battens 12mm softwood ceiling lining sarking lightweight insulation 20kg m2.
Roof and ceiling mass.
The massachusetts state building code 776 780 cmr seventh edition 12 28 07 1 1 08 ceiling roof area of the addition combined.
If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic often water runs to openings in the vapor barrier such as at ceiling light fixtures.
Roof ceiling construction amendments pdf 163 kb this is part of.
Stratco ceiling battens at 450 centres 0 35 0 45 0 78.
Ninth edition of the ma state building code 780 chapter 7.
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The average roof is 3 000 square feet or around 30 squares.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
Roofing material is estimated by the square which is equal to 100 square feet.
If any individual fenestration component exceeds the maximum u factor listed in 780 cmr table 6101 3 then the area weighted average u factor for all fene str ation c omponents must be less than or equal to the listed value.
Roof ceilings shall be designed and constructed in accordance with the provisions of this chapter and figures r606 11 1 r606 11 2 and r606 11 3 or in accordance with awc nds.
Sometimes the water shows up at a ceiling spot distant from the leak.
Weight kg m 2 code.
Components of roof ceilings shall be fastened in accordance with table r602 3 1.
Some of these can support the roof and prevent ridge sagging and wall spreading.
Open pdf file 163 kb for 780 cmr ninth edition residential chapter 8.
Weights of building materials in walls.
Collar ties rafter ties tension beams structural ridge beams.
Many homes have an asphalt shingle roof but some have wood metal tile and slate which can be more expensive.
As1170 1 2002 ta2 92kg m 2 per 100mm.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.