Ask Experts Questions for FREE Help !
Ask
    Montaukian's Avatar
    Montaukian Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 1, 2012, 02:59 PM
    Sistering roof rafters?
    I have a 19 year-old roof with 2" x 10" roof rafters that are not of good quality wood; they were originally sistered on one side of some of the existing raftes with 2" x 10" boards but were apparently not fastened together properly (lag bolts) with not enough fasteners. The pitch of the roof is relatively shallow; it is not a steeply pitched roof.
    What is the best way to insure a permanent fix considering the dimensions of the existing rafters and the amount of downward stress at the ridge?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Mar 2, 2012, 07:28 AM
    Downward loading on roof rafters should transfer to the outside wall. 2X10 is a pretty substantial rafter and I don't know why they would have sistered unless the existing rafter is cracked. Do you have collar ties across the rafters?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Mar 2, 2012, 08:33 AM
    Glued and screwed is the best mthod of sistering a rafter. How many roofs are on the bulding? One of the areas I have worked allows up to 3 roofs but that does cause the rafters to start bowing in some cases
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Damaged roof rafters [ 4 Answers ]

I am about to do some repairs to my roof rafters. A few of which have water damage to the ends. My question is:- a) When sistering a rafter, should I cut out the damaged part of the old rafter to stop the damage travelling anf further? b) should I clamp both sides of the old rafter or is...

Cutting Roof Rafters [ 14 Answers ]

I want to know how long my rafters should be if my overall span is 141" (11' 9") The pitch I would like to use on the roof is a 6 / 12 pitch Also how do I determine the birds mouth and plumb cuts? I would also like to use a 8 inch overhang. Thanks in advance!

Figureing roof rafters [ 1 Answers ]

I am thinking about building me a room add. Its not my everyday job but I want to do it myself. But I don't know how to figure for my rafters. And I don't want trusses. I'm not sure what pitch I want yet. Or how big my room is going to be yet. Thank you for your reply and help

Sistering roof rafters [ 5 Answers ]

I own a chicago style brick bungalow. I am going to put a bonus room in 1/2 of the attic. I am going to put down 1/2 " osb for a subfloor over 1 x 6 floor joists. i am going to build 2 knee walls down the length of the room and hang 3/8 inch dry wall on 2x 6 roof rafters 16" on center. Do I...

Uneven roof rafters [ 1 Answers ]

I am in the process of finishing part of our attic to be a 4th bedroom. I have found that the size of roof rafters vary (2x6, 2x6.5 and 2x7). How do I even these up so I can install a plasterboard ceiling?

View more questions Search