Screw quanity question
I would like to thank all the guys that have gave me some great advise on my deck project.Good FREE advise is hard to come by these days!! I am just about to start putting the top decking on and was trying to figure out how many screws I need to buy.I am going to use Deckmate # 8 2 1/2.No where can I find the quanity of screws to the pound on any of their packaging. At the orange box they sell them by the 1,5 and 25 lb. box. Seems to be a big difference in price. Anyone got an idea appoxamatly how many screws to the pound there should be? Thanks Tom Look at the 1# box of screws, it should give an approximate number of screws in the box and from there you can extrapolate for larger size boxes. I'm guessing you should find something around 100 screws per pound. 100 per lb. may be a high guess. Fasten Master sells Trap Ease in boxes of 75 screws (approx. 1 lb.) that covers about 20 sq. ft. They have boxes of 350 (approx. 5 lbs.) that cover about 100 sq. ft. of deck. They also have buckets of 1750 screws that cover about 450 sq. ft. of decking. 3 of the 5 lb. boxes costs about the same as one bucket. Deck Mate should be pretty similar. I bought a 5lb box of the #9x3 redwood star drive screws and weighed about 30 of them. They work out at around 6grams each (Im European) or 345 per 5 lb box. Problem is I can't ind them anymore. I don't want to mix them with square drive or phillips head for aesthetic reasons. Does anyone know where I can get more star drive headed ones? I've tried several places around San Francisco area, but no joy. I tihnk I bought the box in HD, Marina Del Rey in LAX DaleC...they started switching the combo drive screws for the star drive about 6-9 months ago around here. I thought that was all they were going to carry. Might ask to have someone to dig up on the upper rack and see if they are just trying to move the old stuff. Wow, fast reply GunGuy. Thanks. I was in SFO yesterday and they had the #10x3.5, I'm raging I didn't buy them now that I realised that contractors prefer not to go loking for the Star headed driver bit. I tried about 3 stores there and have spent a few hours online looking for a supplier, but no joy. Anyone else out there seen them? Oh...and as for quantities, have a look at their website Deck Mate of course nothing as useful as supplier details, prices or star drive info!!! DaleC, Welcome to the forums. At the top of this page there is an ad for Torx drive screws in various quantities. Try them -- ahturf.com A #9 seems to be an awfully big screw -- everybody's screws that I use are #8's. But then those are for a composite or vinyl decking, not redwood. I haven't installed a redwood deck in 5 or 6 years. Thanks Lefty, I'll have a look at that. This is my first decking project and tricky to get finished when you're working on your own with temperatures constantly around 40F and ample rain (it's Ireland after all). I've done the concrete footers,4x4 PBS and have started into the framing. Most of the redwood has been sealed with Penofin Hardwood oil. Do you guys ever find the need to lay tar paper or other waterproof material along the edge of PT joists in wet climates or is this me going beltsbraces at the project? Apart from spraying weedkiller, laying weedblock and drainpipes with rat poison in them, is there anything I've left out below deck level that I should do before closing it all up? Thanks in advance guys. Dale ..and another query for those of you in the know. I'm planning on putting down 6x2x 10 ft heartwood redwood 18 O.C with 6ft spans on Douglas Fir PT frames for a deck that will be approx 12ftx17ft. I think I read somewhere NOT to put 2 screws in either end but to put one in each end and not to countersink them. What would your thoughts be on this and would it be necessary to screw down the redwood EVERY 18? or can you get away with less. I thought you'd need at least the four screws on both ends to stop twisting and any shirnkake from snapping off the screwheads or splitting the redwood. I really appreciate any input you guys would have as it would save me hours of troubleshooting later. Thanks again Dale Dale, I put Vycor on the tops of the joists before I install the decking. Vycor is a vinyl with an adhesive backing. When the screw penetrates the backing, it seals around the shank of the screw. Tar paper won't do that, and tar paper is just going to fall apart in a few years after being exposed to any moisture or weather. Vycor, Peel Seal, or whatever similar product that you can find in Iceland will do as well. And you have mentioned that you have been at LAX, SFO, and wherever in the past month or so. You may want to do some shopping in those areas. Thanks Lefty, I'll add it to the hardware shopping list for this weekend. What do you think about screwing down the ends of the 10ft boards? Will I need to countersink them? Thnx disregard entered in error I bought a 25-lb container of deck screws at Home Depot for putting down my floor decking. The associate I asked was able to tell me how many screws it was (around 2300).
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