Home Repair (alt.home.repair) For all homeowners and DIYers with many experienced tradesmen. Solve your toughest home fix-it problems.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
chester
 
Posts: n/a
Default concrete slab next to house foundation

I am going to pour 2 ~8.5ft x 3.5ft slabs next to my house, right up to
the foundation. I a then going to install a couple of 3x8 sheds on them
(Arrow vinyl/steel). Anyway, my initial plan was this:

Pour the slabs at a slope, (1/4" per foot) leading away from the
foundation, to ensure water is led away. I was going to accomplish this
by having the boards on the sides of my pour sloped at the angle I want,
and then using these boards to "level" the concrete out when it is
poured, this giving the concrete its slope.

First, will this work? Will the concrete stay at this angle?

Second, is there another way to prevent water from flowing towards the
foundation, besides this? I will have to shim the sheds up, and that
will be a hassle, and I will have ~3/4" ridge at the entrance, which is
somewhat undesirable. Could I pour the concrete true level, and then put
something at the junction of the existing foudnation and the new slab
instead?

thx
  #2   Report Post  
 
Posts: n/a
Default

As I understand it:
The slabs will be covered by the sheds.
The shed roof will determine where the water goes.
The slab can be flat.
The top of the slab should be above the ground level to exclude water.
The slab should be separated from the existing construction so it
doesn't bond with or hang up on the existing materials and can move
independently.
TB

  #3   Report Post  
chester
 
Posts: n/a
Default


The slab should be separated from the existing construction so it
doesn't bond with or hang up on the existing materials and can move
independently.
TB


Thanks. That makes a lot of sense. I will plan on putting a spacer in
the back. My only issue is, while the slabs will be almost enitrely
covered by the shed roofs, the shed desgign is that the roof slopes
back, so they will essentilly be directling water towards the house. On
the other hand, the side of the house normally takes water from rain
anyway, so I can't decide if this is a bad situation or not.
  #4   Report Post  
Edwin Pawlowski
 
Posts: n/a
Default


"chester" wrote in message

Pour the slabs at a slope, (1/4" per foot) leading away from the
foundation, to ensure water is led away. I was going to accomplish this by
having the boards on the sides of my pour sloped at the angle I want, and
then using these boards to "level" the concrete out when it is poured,
this giving the concrete its slope.

First, will this work? Will the concrete stay at this angle?


Yes, but put expansion joint material against the house.


Second, is there another way to prevent water from flowing towards the
foundation, besides this?


The shed roof will direct some of it. If the roof is an "A" frame it will
direct some near the house though. Other that holding an umbrella when it
rains, a little pitch is the best way.

I will have to shim the sheds up, and that will be a hassle, and I will
have ~3/4" ridge at the entrance, which is somewhat undesirable. Could I
pour the concrete true level, and then put something at the junction of
the existing foudnation and the new slab instead?


It's a shed, not a home for billiards tables. You won't notice the slight
pitch.


  #5   Report Post  
chester
 
Posts: n/a
Default

Edwin Pawlowski wrote:

"chester" wrote in message

Pour the slabs at a slope, (1/4" per foot) leading away from the
foundation, to ensure water is led away. I was going to accomplish this by
having the boards on the sides of my pour sloped at the angle I want, and
then using these boards to "level" the concrete out when it is poured,
this giving the concrete its slope.

First, will this work? Will the concrete stay at this angle?



Yes, but put expansion joint material against the house.


Second, is there another way to prevent water from flowing towards the
foundation, besides this?



The shed roof will direct some of it. If the roof is an "A" frame it will
direct some near the house though. Other that holding an umbrella when it
rains, a little pitch is the best way.


I will have to shim the sheds up, and that will be a hassle, and I will
have ~3/4" ridge at the entrance, which is somewhat undesirable. Could I
pour the concrete true level, and then put something at the junction of
the existing foudnation and the new slab instead?



It's a shed, not a home for billiards tables. You won't notice the slight
pitch.


Thanks. As I said, my main concern now is the shed design, which ia
asingle roof, that slopes BACK. I am not sure this is a really bad idea
or not.


  #6   Report Post  
John McGaw
 
Posts: n/a
Default

chester wrote:
Edwin Pawlowski wrote:

"chester" wrote in message

Pour the slabs at a slope, (1/4" per foot) leading away from the
foundation, to ensure water is led away. I was going to accomplish
this by having the boards on the sides of my pour sloped at the angle
I want, and then using these boards to "level" the concrete out when
it is poured, this giving the concrete its slope.

First, will this work? Will the concrete stay at this angle?




Yes, but put expansion joint material against the house.


Second, is there another way to prevent water from flowing towards
the foundation, besides this?




The shed roof will direct some of it. If the roof is an "A" frame it
will direct some near the house though. Other that holding an
umbrella when it rains, a little pitch is the best way.


I will have to shim the sheds up, and that will be a hassle, and I
will have ~3/4" ridge at the entrance, which is somewhat undesirable.
Could I pour the concrete true level, and then put something at the
junction of the existing foudnation and the new slab instead?




It's a shed, not a home for billiards tables. You won't notice the
slight pitch.

Thanks. As I said, my main concern now is the shed design, which ia
asingle roof, that slopes BACK. I am not sure this is a really bad idea
or not.


You say that the shed roof will be directing water toward the house.
This, on the face of it, sounds like a bad idea. In fact, anything that
directs water _toward_ the house sounds like a bad idea and most of us
do a lot of work with gutters and drains and landscaping to make sure
that water heads in the other direction. Where is it that the water
will be going once it rolls down the shed roof and hits the house? Is
there some escape route? Will it run down between the shed and the house
and, if so, where will it go then?

I write this as one who spent many backbreaking hours demolishing two
large concrete patios that were poured attached to the foundation of my
older home and which, by design or shifting, were sloped to direct water
toward the foundation. It made for a really ugly situation during heavy
downpours.
--
John McGaw
[Knoxville, TN, USA]
http://johnmcgaw.com
  #7   Report Post  
chester
 
Posts: n/a
Default

You say that the shed roof will be directing water toward the house.
This, on the face of it, sounds like a bad idea. In fact, anything that
directs water _toward_ the house sounds like a bad idea and most of us
do a lot of work with gutters and drains and landscaping to make sure
that water heads in the other direction. Where is it that the water
will be going once it rolls down the shed roof and hits the house? Is
there some escape route? Will it run down between the shed and the house
and, if so, where will it go then?


Well, it DOES sound like a bad idea, to be sure. I will not attatch the
shed to the foundation. The idea would be, that the slab will be sloped
away from the house mildly, and the water would run down the back and
down the concreate away from the house. but it still makss me a bit
uncomfortable. I dont have the sheds yet, so I cant really get a grasp
of how it will be. I have given some thought to rigging a gutter system
for the backs of the sheds, that would take the water away from the back
of the sheds.




I write this as one who spent many backbreaking hours demolishing two
large concrete patios that were poured attached to the foundation of my
older home and which, by design or shifting, were sloped to direct water
toward the foundation. It made for a really ugly situation during heavy
downpours.

  #8   Report Post  
Don Young
 
Posts: n/a
Default

If you install a shed roof to direct water back to a narrow space between
the shed and the house you will always regret it. Don't do it. Just turn the
shed in another direction or get a different design.
Don Young
"chester" wrote in message
...
You say that the shed roof will be directing water toward the house.
This, on the face of it, sounds like a bad idea. In fact, anything that
directs water _toward_ the house sounds like a bad idea and most of us do
a lot of work with gutters and drains and landscaping to make sure that
water heads in the other direction. Where is it that the water will be
going once it rolls down the shed roof and hits the house? Is there some
escape route? Will it run down between the shed and the house and, if so,
where will it go then?


Well, it DOES sound like a bad idea, to be sure. I will not attatch the
shed to the foundation. The idea would be, that the slab will be sloped
away from the house mildly, and the water would run down the back and down
the concreate away from the house. but it still makss me a bit
uncomfortable. I dont have the sheds yet, so I cant really get a grasp of
how it will be. I have given some thought to rigging a gutter system for
the backs of the sheds, that would take the water away from the back of
the sheds.




I write this as one who spent many backbreaking hours demolishing two
large concrete patios that were poured attached to the foundation of my
older home and which, by design or shifting, were sloped to direct water
toward the foundation. It made for a really ugly situation during heavy
downpours.



  #9   Report Post  
Sherman
 
Posts: n/a
Default

On Sun, 7 Aug 2005 21:35:44 -0500, "Don Young"
wrote:

If you install a shed roof to direct water back to a narrow space between
the shed and the house you will always regret it. Don't do it. Just turn the
shed in another direction or get a different design.
Don Young
"chester" wrote in message
...
You say that the shed roof will be directing water toward the house.
This, on the face of it, sounds like a bad idea. In fact, anything that
directs water _toward_ the house sounds like a bad idea and most of us do
a lot of work with gutters and drains and landscaping to make sure that
water heads in the other direction. Where is it that the water will be
going once it rolls down the shed roof and hits the house? Is there some
escape route? Will it run down between the shed and the house and, if so,
where will it go then?


Well, it DOES sound like a bad idea, to be sure. I will not attatch the
shed to the foundation. The idea would be, that the slab will be sloped
away from the house mildly, and the water would run down the back and down
the concreate away from the house. but it still makss me a bit
uncomfortable. I dont have the sheds yet, so I cant really get a grasp of
how it will be. I have given some thought to rigging a gutter system for
the backs of the sheds, that would take the water away from the back of
the sheds.




I write this as one who spent many backbreaking hours demolishing two
large concrete patios that were poured attached to the foundation of my
older home and which, by design or shifting, were sloped to direct water
toward the foundation. It made for a really ugly situation during heavy
downpours.



My horror story has to do with termites coming into my home from
between the slab and my foundation. I now refuse to butt up a slab to
my foundation. I want a gap of 2 or 3 inches minimum so I can make a
visible check of my foundaton completely around the house.


  #10   Report Post  
chester
 
Posts: n/a
Default

Don Young wrote:

If you install a shed roof to direct water back to a narrow space between
the shed and the house you will always regret it. Don't do it. Just turn the
shed in another direction or get a different design.
Don Young
"chester" wrote in message
...



Yeah after thinking about it, and thinking...well I could just put a
roof over the sheds, and flash the roof... If I am going to do that, why
dont I just bulid a shed on the foundation instead? So I cx'd the shed
order, and I will just build my own shed to direct the water out, abut
the shed roof with the wall of the house, and flash the roof. This will
allow me to pour the concrete pretty much flat, and i will leave a
1~1.5" gap betreen the house foundation and the slab.

Thanks for the input


  #11   Report Post  
Don Young
 
Posts: n/a
Default

Sounds like good thinking.
Don Young
"chester" wrote in message
...
Don Young wrote:

If you install a shed roof to direct water back to a narrow space between
the shed and the house you will always regret it. Don't do it. Just turn
the shed in another direction or get a different design.
Don Young
"chester" wrote in message
...



Yeah after thinking about it, and thinking...well I could just put a roof
over the sheds, and flash the roof... If I am going to do that, why dont I
just bulid a shed on the foundation instead? So I cx'd the shed order, and
I will just build my own shed to direct the water out, abut the shed roof
with the wall of the house, and flash the roof. This will allow me to pour
the concrete pretty much flat, and i will leave a 1~1.5" gap betreen the
house foundation and the slab.

Thanks for the input



  #12   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 1
Default concrete slab next to house foundation

replying to chester, Slolrner wrote:
If it was me I would build a 3-inch curb from the foundation all the way
across where it would divert the water from running onto the slab and you're
going to pour concrete anyway you might as well make a little concrete gutter
out of it

--
for full context, visit https://www.homeownershub.com/mainte...ion-20207-.htm


  #13   Report Post  
Posted to alt.home.repair
external usenet poster
 
Posts: 15,279
Default concrete slab next to house foundation

On Friday, July 6, 2018 at 12:14:06 AM UTC-4, Slolrner wrote:
replying to chester, Slolrner wrote:
If it was me I would build a 3-inch curb from the foundation all the way
across where it would divert the water from running onto the slab and you're
going to pour concrete anyway you might as well make a little concrete gutter
out of it

--
for full context, visit https://www.homeownershub.com/mainte...ion-20207-.htm


Sounds like an ugly little ditch for dirt and debris to accumulate in that serves no purpose. I've seen lots of patios, never one poured like that. You just pitch it slightly away from the foundation.
Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
New house concrete slab crack Dan C Home Repair 5 March 14th 05 05:17 AM
Evaporative cooler question SteveB Home Repair 105 February 1st 05 02:06 PM
Slab for AC not concrete... Home Repair 7 October 21st 04 06:17 PM
BLASTING DAMAGE TO MY HOUSE -- DETAILS -- HELP PLEASE Research86 Home Repair 8 February 14th 04 10:38 PM
Pinning new patio to existing foundation Jeff Home Repair 0 January 21st 04 04:24 AM


All times are GMT +1. The time now is 02:39 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 DIYbanter.
The comments are property of their posters.
 

About Us

"It's about DIY & home improvement"