Membrane / Discussions

Is the ZIP sheathing system good or bad for water control?

...membranes is to always have a positive lap when joining two pieces of membrane together; However, this is not possible when just slapping on a piece of special ...

Posted by Trevor Prinz Nov. 26, 2019, 4:03 p.m. Walls and Roofs 5 Responses

How do I waterproof a foundation from the inside?

We have a self-adhesive membrane on the outside wall of our foundation but the water enters through the joint between the walls and the floor. How can I waterp...

Posted by Kurt Brenner Nov. 14, 2017, 9:47 a.m. Foundations and Basements 1 Responses

is a double vapor barrier on a South Florida roof bad?

...membrane under roof panels but have been advised I would be creating a 'double vapor barrier' potentially trapping moisture in the roof deck causing long term i...

Posted by Arthur Moore April 6, 2020, 12:57 p.m. Roof assemblies - renovation 0 Responses

Can you provide Crawlspace Insulation Design Assistance?

...membrane products stapled to the underside of the joists; I was planning on securing the membrane with firring strips to get a better seal and to prevent the fa...

Posted by Randy Christensen Dec. 10, 2019, 12:17 p.m. Crawl spaces 1 Responses

Is There a Difference Between an Air Barrier and vapor barrier?

...membrane. Is there any other option available to me? Your diagnosis seems pretty accurate with the exception that it would technically be the air barrier and no...

Posted by Sherri Mccormick Aug. 17, 2018, 3:24 p.m. Roof assemblies - renovation 3 Responses

Can you insulate a concrete block basement walls with only rockwool?

...membrane to french drain and sump pump, one side exterior waterproofing, and one side with no waterproofing but also no moisture penetration issues. Our plan af...

Posted by Aarne Valikangas Jan. 1, 2021, 9:22 p.m. Basements improvements 1 Responses

Where can I find supplies for a green roof?

...membrane with primer as the last line of defense, but that actually becomes the ‘backup’ membrane since once you lay down the poly root barrier (the green one i...

Posted by Nadia Naderi Oct. 8, 2020, 6:38 p.m. Roof coverings 1 Responses

Is a vapor barrier necessary under a concrete slab with foam insulation and if so, where does go?

...membrane, and manufacturers claim it is 100 times less permeable compared to standard poly of the same thickness. If a Radon Block barrier is more than you ca...

Posted by Grady 22 Aug. 17, 2019, 12:19 p.m. Air and vapour barriers 3 Responses

Is sealing basement concrete floor against radon a good idea?

...Membrane ? That is not a liquid sealer, and is used to stop radon gas from entering below basement floors, but it is used before you pour the floor, not after. ...

Posted by Tim Hanrahan Sept. 18, 2020, 3:11 a.m. Radon in Homes - Mitigation 3 Responses

What is the best way to insulate a 1780 brick federal with stone foundation in New York?

...membrane and drainage as well. To do the outside I would propose that you install a dimple drainage matt , along with a weeping tile drained to daylight if you ...

Posted by carole roseman Jan. 5, 2020, 2:39 p.m. Foundation and basement improvements 1 Responses

How do I create a complete air barrier using a vapour retarding primer?

...membrane on the exterior sheathing (seen below). The confusion over managing air and vapour movement comes from the fact that usually one product (6-mil...

Posted by Mihai Wilson May 3, 2018, 10:15 p.m. Wall assemblies - renovation 1 Responses

Can you use polyiso insulation on the exterior of a wall behind cedar siding on the west coast?

...membrane on each side to contain the gases, and that foil is a vapor barrier . Using it on the outside means you are installing an exterior vapour barrier and...

Posted by Iain Matheson Jan. 28, 2020, 10:38 p.m. Wall assemblies - renovation 2 Responses

How do you make an airtight house envelope?

...membrane as the air barrier before you apply any rigid insulation. We did that on one of our demo houses and hit PH airtightness levels, you can see a video of ...

Posted by Valeriy Kraydman Dec. 1, 2020, 2:52 p.m. Air and vapour barriers 1 Responses

What is the best way to insulate a home from the outside?

...membrane over top as an air barrier. If you do add new plywood sheathing, you could just tape the joints and it will act as your air barrier Read all about ho...

Posted by Sylvie Gagnon Dec. 12, 2017, 11:58 a.m. Wall assemblies - renovation 1 Responses

Can you install foam boards directly against basement walls?

...membrane and not just the bitumous spray. Since you likely don't have such a membrane on the exterior, the blocks will always have a certain amount of moisture ...

Posted by Ted Gorab Oct. 3, 2019, 6:09 p.m. Basements improvements 7 Responses

Can basement walls to dry to the inside with foam board?

...membranes, unless there has been a footing membrane included and I’ve never seen one installed that was at my doing. You an image of what a footing membrane loo...

Posted by Tim Hanrahan Aug. 20, 2020, 12:34 a.m. Basements improvements 6 Responses

How do you attach exterior siding without affecting the air barrier on a passive house?

...membrane you apply and tape you choose, just be very careful during installation. Be careful not to puncture it, and when you do, be sure to tape it. Try to avo...

Posted by Scott Bowker July 16, 2018, 11:07 p.m. Wall assemblies - new construction 3 Responses

Can you put hemp insulation in an attic?

...membrane first to prevent and air and vapor movement (assuming you are in a cold climate, but please confirm). On top of that you could lay down hemp insulati...

Posted by Pamella Weatherly-Phillips Aug. 16, 2019, 11:49 a.m. Roof assemblies - renovation 1 Responses