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spray foam insulation for attic
Posted on 3/6/23 at 8:25 am
Posted on 3/6/23 at 8:25 am
Is it worth the price? We've got a two story home with a low height attic that has ventilation on the left and right sides of the house. I've seen pricing between $1,500 - $3,000 on Google but haven't called up anyone local for a quote yet. Was wondering what the board thought.
This post was edited on 3/6/23 at 8:25 am
3
Posted on 3/6/23 at 8:58 pm to BilbeauTBaggins
Do you have gas? If so you will have to change out furnaces and water heaters. It’s a damn good product if done right but I doubt you can get a real quote for that price.
Posted on 3/6/23 at 10:34 pm to jmkidder
We have gas furnace (attic) and gas water heater (downstairs back room).
Posted on 3/7/23 at 7:05 am to BilbeauTBaggins
I'm having it done soon to my attic. things to consider for when you price out
- You'll have to remove your old insulation - my quotes down here in La were about $1.45 to 2.20 a square foot for removal of old blown in. Batt is more expensive to remove.
- I'm paying about $3.45 per sq ft of living area (this includes roof slope and gable ends).
Got three quotes and they were all within what and what. Removal is where they fluctuated
- You'll have to remove your old insulation - my quotes down here in La were about $1.45 to 2.20 a square foot for removal of old blown in. Batt is more expensive to remove.
- I'm paying about $3.45 per sq ft of living area (this includes roof slope and gable ends).
Got three quotes and they were all within what and what. Removal is where they fluctuated
Posted on 3/7/23 at 8:50 am to jmkidder
quote:
Do you have gas? If so you will have to change out furnaces and water heaters.
There are retrofit options for open burner furnaces and water heaters. But the best solution is a replacement.
Posted on 3/7/23 at 8:50 am to PureBlood
quote:
You'll have to remove your old insulation
Probably a stupid question, but do you know why you have to remove the old blown in?
Posted on 3/7/23 at 9:10 am to jmkidder
quote:
Do you have gas? If so you will have to change out furnaces and water heaters.
Why?
Posted on 3/7/23 at 9:26 am to MikeBRLA
They will need to be sealed combustion.
Posted on 3/7/23 at 9:33 am to MikeBRLA
I'm also curious as to the "why"
Posted on 3/7/23 at 9:34 am to jmkidder
I'm not sure I follow. Is it that the furnace will be too close to the foam?
Posted on 3/7/23 at 9:43 am to BilbeauTBaggins
No is because the house is now sealed so if you have a leak in either burnt or unburnt gas you would have a bad problem. So that’s why you need equipment that is 100% sealed
Posted on 3/7/23 at 1:22 pm to jpainter6174
quote:
Probably a stupid question, but do you know why you have to remove the old blown in?
Two reasons
1.) Your attic space becomes a climatized space and will heat/cool with your house systems
2.) It absorbs the fumes of the spray.
Posted on 3/7/23 at 1:27 pm to PureBlood
Is there benefit to just spraying one side of the attic roof? My house takes a lot of sun during the summer months on the front side and thought about just spraying that side to help with the heat coming in.
Posted on 3/7/23 at 1:35 pm to tke_swamprat
quote:
Is there benefit to just spraying one side of the attic roof? My house takes a lot of sun during the summer months on the front side and thought about just spraying that side to help with the heat coming in.
I'm not an expert but from what I understand, the point of spray foam is cut air circulation. Spraying just part of your roof wouldn't seal it off, so probably better off adding a few inches of whatever you got now.
Posted on 3/7/23 at 2:26 pm to tke_swamprat
No benefit, the attic needs to be 100% sealed for it to work.
Posted on 3/8/23 at 1:49 pm to PureBlood
quote:
Your attic space becomes a climatized space and will heat/cool with your house systems
So do you remove your return ducts? wouldn't that require a larger unit?
Posted on 3/8/23 at 3:39 pm to jpainter6174
You still return and supply from the living space. And you won’t need a bigger unit because you won’t have any heat gain from the ducts in the attic picking heat. Also you won’t be really conditioning your attic but it will feel like it, if done right.
Posted on 3/9/23 at 8:30 am to PureBlood
quote:
2.) It absorbs the fumes of the spray.
I’m not so sure that is a big a deal as advertised. Father in law has done this in two homes and kept the insulation in both.
Posted on 3/9/23 at 9:25 am to BilbeauTBaggins
Read this article on foam insulation of attics by Allison Bailes, Energy Vanguard, and the other articles he links at the end of this article. LINK. It’s a good product when done right but it can have pitfalls.
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