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Old 08-29-2008, 01:32 PM   #1
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What is the best base for flagstone patio?


Which is better base for flagstone: Sand over crushed rock or just 3/8 inch crushed rock and fines (rock and dust)? I'm not ready to set flagstone until I feel I can make the right decision.

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Old 08-29-2008, 02:27 PM   #2
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What is the best base for flagstone patio?


by putting concrete underneath and cement over... that is not the problem... the problem is the joints... they also use cements... now after just one year... cement broken off from joints and they need to sweep from time to time and strange plants grow up on various joints and they have to fill in various strange materials on the joints....

so my only comments is never use cement to do the jonts... may be in certain climate is ok... but not in climate like Toronto...

the job was done by their hired contractor who almost becomes ours too...

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Old 08-29-2008, 02:59 PM   #3
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What is the best base for flagstone patio?


My plan is to fill the joints with the 3/8 inch crushed rock and dust along with a little cement powder to keep the rock in place.
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Old 08-31-2008, 10:33 PM   #4
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What is the best base for flagstone patio?


which is it, base or jnt filler ???,,, w/o a decent base, nothing else matters,,, i wouldn't use any cement & i don't have to ask questions about flag patios,,, worry about the base & just sweep in sand or cinders.
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Old 09-01-2008, 01:37 AM   #5
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What is the best base for flagstone patio?


My question is about the choice of base material. Crushed rock with sand above it or 3/8 inch minus (crushed rock and fines).
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Old 09-01-2008, 07:05 AM   #6
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What is the best base for flagstone patio?


depending on the frost depth you usually experience, 3/8"- graded aggregate base, crusher run, # 87, or # 89 crushed stone'll work.

last flat patio i installed was 12" of #89 w/2" of gab under ashlar treads,,, more important, tho, were the drains to carry away wtr.,,, 40 yrs & still in good shape.
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Old 09-01-2008, 08:23 AM   #7
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What is the best base for flagstone patio?


Quote:
Originally Posted by stardell View Post
My question is about the choice of base material. Crushed rock with sand above it or 3/8 inch minus (crushed rock and fines).

I used crushed rock. Graded it then rented a compacter to, then I used sand above it. Looks ok ten years later. The ants absolutely love it though. I throw poison down twice a year to keep the ant population kinda sorta in check. Sucks for the dog, sucks even worse that the patio is right outside the kitchen wall. In retrospect I should have had a mason come and pour a slab and laid the flagstone on top of it.
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Old 09-02-2008, 09:34 AM   #8
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What is the best base for flagstone patio?


as it does not require sand.... and very good at defeating weed....

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