Model # 320821

Internet #202532854

Store SKU #614637

R-Tech 1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing
0732813100072

R-Tech

1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing

  • Easy to cut, split and install
  • Energy Star qualified
  • 1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

  • Easy to cut, split and install
  • Energy Star qualified
  • 1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing
R-Tech 1 in. x 4 ft. x 8 ft. Insulation Sheathing cuts easily to size. Facilitating its installation as wall sheathing, basement and foundation insulation or siding underlayment. This product meets federal guidelines for energy efficiency.
  • Designed for use as wall sheathing, basement and foundation insulation or siding underlayment
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Cuts easily to size to make installation a snap
  • Poly-facer on both sides for flexibility and durability
  • Moisture-resistant design to help maintain a water-tight seal
  • Note: Product may vary by store
  • How much do you need? Let our calculator help:
    Insulation calculator button

Product Overview

  • Easy to cut, split and install
  • Energy Star qualified
  • 1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing
Model #: 320821
Sku #: 614637
Internet #: 202532854

R-Tech 1 in. x 4 ft. x 8 ft. Insulation Sheathing cuts easily to size. Facilitating its installation as wall sheathing, basement and foundation insulation or siding underlayment. This product meets federal guidelines for energy efficiency.

  • Designed for use as wall sheathing, basement and foundation insulation or siding underlayment
  • Energy Star qualified to meet or exceed federal guidelines for energy efficiency for year-round energy and money savings
  • Cuts easily to size to make installation a snap
  • Poly-facer on both sides for flexibility and durability
  • Moisture-resistant design to help maintain a water-tight seal
  • Note: Product may vary by store
  • How much do you need? Let our calculator help:
    Insulation calculator button

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Specifications

Dimensions

Product Depth (in.)
1
Product Height (in.)
96
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48

Details

Faced or Unfaced
Faced
Insulation Application Type
2x4 Walls,2x6 Walls,Attics,Basements,Crawlspaces,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
Insulation R-Value
3.85
Insulation Type
Sheathing
Interior/Exterior
Interior/Exterior
Product Weight (lb.)
2.7lb
Sheathing Type
EPS
Structural
Yes

Warranty / Certifications

Warranty Information
N/A

Specifications

Dimensions

Product Depth (in.)
1
Product Height (in.)
96
Product Length (ft.)
8 ft
Product Thickness (in.)
1 in
Product Width (in.)
48

Details

Faced or Unfaced
Faced
Insulation Application Type
2x4 Walls,2x6 Walls,Attics,Basements,Crawlspaces,Exterior Sheathing,Exterior Wall Foundation,Garage,Under Slab
Insulation R-Value
3.85
Insulation Type
Sheathing
Interior/Exterior
Interior/Exterior
Product Weight (lb.)
2.7lb
Sheathing Type
EPS
Structural
Yes

Warranty / Certifications

Warranty Information
N/A

Questions & Answers

I have a single pane window can I use on the window for insulation? How can I attach to the alum...

I have a single pane window can I use on the window for insulation? How can I attach to the aluminum frame the the window is 4x8. Thank you Chuck:
Asked by: Chuck
Dear Chuck: Unfortunately, this foam board panel won't help much unless you also air-seal all of the edges. Otherwise, chilled air will simply flow out along the bottom and pull warm air in from the top edge. In effect, you will create an "air cooling panel" unless the edges are sealed. In addition, foam board is flammable and emits toxic gas when it burns, and must be covered by an approved 'thermal barrier' in any living space, basement, garage or attic storage area. This obviously is not possible over your window. Home Depot sells a better option, the window sealing kit from 3M: Model # 2120-EP, Home Depot Internet #100353672 Store SKU #960159 You can seal this clear plastic sheet inside your window, creating a sealed air gap that will block drafts and provide insulation -- similar to exterior storm windows. I hope this is helpful, Mark
Answered by: BvilleBound
Date published: 2017-12-14

I am insulating my crawlspace and am planning to use a batt insulation between the rafters and th...

I am insulating my crawlspace and am planning to use a batt insulation between the rafters and then put these sheets on over the rafters. I have a bamboo floating floor with a foil-faced underlayment above the crawlspace. Should i use a faced board - I'm concerned that coupled with the foil faced underlayment above, i might trap moisture.
Asked by: warmatlast
This should work the same as a face board. If your concerned with moisture making its way thru the seams use a good HVAC tape to seal the joints. If moisture has another way to get inbetween , you will need some vents . Since your floor also has foiled underlayment it is protected from moisture from below. We have used this product for cement slab underlayment, along with crawl space, metal building walls and unfinished garages and have not see any issues of condensation being trapped as long as direct moisture can’t get inbetween .
Answered by: FrankieG
Date published: 2017-12-04

Is this lightweight? Can it easily be ripped? Can it get wet without it rotting?

Is this lightweight? Can it easily be ripped? Can it get wet without it rotting?
Asked by: Suzy
Yes its lightweight, but requires a knife or a saw to cut the material they also make electric knives which are essentially a hot iron or Steel knife that is heated up to cut through the phone this is open cell foam versus closed cell foam insulation. Which means it can take on water as not to be used and is submerged area. Closed cell foam which is more like the blue and pink style Owens Corning can be submerged without rotting. This phone can be in damp areas as long as it's not submerged. It does have a water-resistant membrane which is rot resistant and Bug resistant, but if the foam were to be submerged it would take on water eventually.
Answered by: DSC
Date published: 2017-12-04

Can this product be used below grade? and is it moisture repellent? I want to use it as a barrier...

Can this product be used below grade? and is it moisture repellent? I want to use it as a barrier wall from floor to ground
Asked by: Hawk
Dear Hawk: Yes, with one caveat -- this type of foam board does not have enough 'compressive strength' for use under a concrete slab. Home Depot sells another foam board product that does: Foamular 250, which also provides higher R-value per inch of thickness. Foamular does not absorb water, making this the best choice for below grade insulation. See: Foamular Model # 52DD, Home Depot Internet #202085962 Store SKU #307101 I hope this is helpful, Mark
Answered by: BvilleBound
Date published: 2018-01-03
  • y_2018, m_1, d_14, h_5CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.6
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_86
  • loc_, sid_202532854, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 84ms
  • QUESTIONS, PRODUCT

Customer Reviews

1 in. x 4 ft. x 8 ft. R-3.85 Insulating Sheathing is rated 4.5 out of 5 by 25.
Rated 5 out of 5 by from I use this to cover the gap between my window frame and AC unit. It does nothing for security, b... I use this to cover the gap between my window frame and AC unit. It does nothing for security, but it definitely keeps the cold air from leaking.
Date published: 2017-12-14
Rated 5 out of 5 by from Very easy to cut and install Very easy to cut and install
Date published: 2017-12-12
Rated 2 out of 5 by from very cheap material I was looking for the reflective... very cheap material I was looking for the reflective backing material and opted to buy this insulation at an affordable price was building a grow room so it didn't need to b special just to block light from entering I would buy it again just go with the 3''
Date published: 2017-11-07
Rated 5 out of 5 by from Used the insulation board for bottom skirting on my Fifth... Used the insulation board for bottom skirting on my Fifth Wheel RV to block out winter wind and coldness. Great insulation, very easy to cut and form and good price for a little extra warmth.do
Date published: 2018-01-09
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2017-11-29
Rated 4 out of 5 by from 4 Star Review Rating provided by a verified purchaser
Date published: 2017-09-27
Rated 5 out of 5 by from excellent product, reasonal price.... excellent product, reasonal price.
Date published: 2017-11-07
Rated 4 out of 5 by from Backing could be more secure.... Backing could be more secure.
Date published: 2017-08-15
  • y_2018, m_1, d_14, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.6
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_25
  • loc_, sid_202532854, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 115ms
  • REVIEWS, PRODUCT