Per Guide https://perguide.com/ Per Guide is a manual for homeowners who want to understand how their house is built before touching a tool. We explain the physical structure just as a patient builder would point a flashlight at the basement joists. Pulling down drywall… en-us Thu, 22 Oct 2026 11:10:00 GMT Signs old attic insulation should come out https://perguide.com/calling-a-pro/signs-old-attic-insulation-should-come-out/ https://perguide.com/calling-a-pro/signs-old-attic-insulation-should-come-out/ Thu, 22 Oct 2026 11:10:00 GMT Discover the signs that tell you when attic insulation removal is necessary and when you can simply add a new layer over the top of the old material. Which home projects need a building permit and which do not https://perguide.com/calling-a-pro/which-home-projects-need-building-permit/ https://perguide.com/calling-a-pro/which-home-projects-need-building-permit/ Mon, 12 Oct 2026 16:13:00 GMT Find out exactly what your city building department does, which home projects require a permit, and the small repairs you can do without permission. How an addition roof joins the existing roofline https://perguide.com/adding-on/how-addition-roof-joins-existing-roofline/ https://perguide.com/adding-on/how-addition-roof-joins-existing-roofline/ Tue, 06 Oct 2026 16:28:00 GMT Learn how a roof extension joins your existing roofline through a shed tie in, a gable with valleys, or a low slope link to prevent leaks. How a room addition ties into the house you already have https://perguide.com/adding-on/how-room-addition-ties-into-house/ https://perguide.com/adding-on/how-room-addition-ties-into-house/ Fri, 02 Oct 2026 18:23:00 GMT Building an extension on a house requires linking the new foundations, load bearing walls and mechanical systems directly to your existing structure. 5 ways to insulate exposed pipes in cold spaces https://perguide.com/building-systems/ways-to-insulate-exposed-pipes/ https://perguide.com/building-systems/ways-to-insulate-exposed-pipes/ Fri, 04 Sep 2026 14:11:00 GMT Protect your home from winter freeze damage with exposed pipe insulation applied correctly to water lines, valves, and water heaters in cold spaces. Why ducts in the attic need insulation and how much https://perguide.com/building-systems/why-attic-ducts-need-insulation/ https://perguide.com/building-systems/why-attic-ducts-need-insulation/ Wed, 02 Sep 2026 22:43:00 GMT Find out why hvac duct insulation matters in an attic, how much air bare ducts lose, and exactly what R-value you need for supply lines. What roof decking does and the signs it needs replacing https://perguide.com/roof-structure/roof-decking-signs-it-needs-replacing/ https://perguide.com/roof-structure/roof-decking-signs-it-needs-replacing/ Wed, 02 Sep 2026 01:24:00 GMT Roof decking is the wood foundation holding your shingles, and dark attic stains or a sagging roofline can signal it needs replacing. 9 parts of a roof and what each one does https://perguide.com/roof-structure/parts-of-a-roof-what-each-does/ https://perguide.com/roof-structure/parts-of-a-roof-what-each-does/ Sat, 15 Aug 2026 13:53:00 GMT Learn the nine parts of a roof from the frame to the flashing, so you can understand your roof structure, spot problems early and talk to contractors. How roof pitch is measured and what the numbers mean https://perguide.com/roof-structure/how-roof-pitch-is-measured/ https://perguide.com/roof-structure/how-roof-pitch-is-measured/ Tue, 11 Aug 2026 17:30:00 GMT Learn how to measure the pitch of roofs and understand what the rise over run numbers mean for shingles, attic space and roof replacements. Hip vs gable roof and how each one stands up to high wind https://perguide.com/roof-structure/hip-vs-gable-roof-high-wind/ https://perguide.com/roof-structure/hip-vs-gable-roof-high-wind/ Wed, 05 Aug 2026 14:50:00 GMT Understand the difference between a hip vs gable roof, how each structure is framed, and why hip roofs perform better in hurricane wind zones. 9 roof types on American houses and how each is framed https://perguide.com/roof-structure/roof-types-american-houses-how-each-framed/ https://perguide.com/roof-structure/roof-types-american-houses-how-each-framed/ Mon, 03 Aug 2026 15:26:00 GMT Learn about the nine most common roof types on American houses and how builders frame them to handle heavy rain, winter snow and high wind. 6 steps to insulate a crawl space and keep moisture out https://perguide.com/insulation-and-moisture/insulate-crawl-space-keep-moisture-out/ https://perguide.com/insulation-and-moisture/insulate-crawl-space-keep-moisture-out/ Fri, 24 Jul 2026 01:08:00 GMT Learn the exact steps to install crawl space insulation with a vapor barrier to control moisture, stop floor drafts and protect the wood frame of your house. Does your attic need a vapor barrier https://perguide.com/insulation-and-moisture/does-your-attic-need-vapor-barrier/ https://perguide.com/insulation-and-moisture/does-your-attic-need-vapor-barrier/ Wed, 22 Jul 2026 16:10:00 GMT Find out if your house needs an attic vapor barrier based on your climate zone and learn how to stop trapped moisture from rotting your roof. Where R13 insulation belongs and when R15 or R19 fits better https://perguide.com/insulation-and-moisture/where-r13-insulation-belongs/ https://perguide.com/insulation-and-moisture/where-r13-insulation-belongs/ Sun, 19 Jul 2026 17:34:00 GMT Find out where R13 insulation belongs in your walls and when R15 or R19 fits better for 2x4 and 2x6 framing to stop heat loss effectively. How to blow insulation into your attic step by step https://perguide.com/insulation-and-moisture/how-to-blow-insulation-into-attic/ https://perguide.com/insulation-and-moisture/how-to-blow-insulation-into-attic/ Fri, 26 Jun 2026 18:11:00 GMT Learn how a blow insulation attic project works from start to finish by prepping the floor, sealing air leaks and running a rented blower safely. Blown in insulation or batts and which suits your house https://perguide.com/insulation-and-moisture/blown-in-insulation-or-batts/ https://perguide.com/insulation-and-moisture/blown-in-insulation-or-batts/ Sat, 20 Jun 2026 18:50:00 GMT Compare blown in insulation with traditional batts and rolls to find the right material for your attic, open framing or closed existing walls. How much attic insulation you need for your climate zone https://perguide.com/insulation-and-moisture/attic-insulation-r-value-by-climate-zone/ https://perguide.com/insulation-and-moisture/attic-insulation-r-value-by-climate-zone/ Wed, 03 Jun 2026 13:17:00 GMT The exact amount of r value insulation you need depends on your local climate zone, with attic targets ranging from R30 up to R60 for severe cold weather. 8 things a structural engineer checks in a foundation inspection https://perguide.com/calling-a-pro/structural-engineer-foundation-inspection-checks/ https://perguide.com/calling-a-pro/structural-engineer-foundation-inspection-checks/ Tue, 19 May 2026 16:48:00 GMT A foundation inspection home visit by a structural engineer checks wall cracks, floor levels and framing to give you an independent repair plan. What shear walls and hold downs do in a wood frame house https://perguide.com/walls-and-framing/what-shear-walls-and-hold-downs-do/ https://perguide.com/walls-and-framing/what-shear-walls-and-hold-downs-do/ Tue, 28 Apr 2026 11:13:00 GMT Find out how hold downs for shear walls keep your wood frame house standing during high winds and earthquakes by resisting strong sideways forces. How a house is framed from the sill plate to the rafters https://perguide.com/walls-and-framing/how-a-house-is-framed-sill-plate-to-rafters/ https://perguide.com/walls-and-framing/how-a-house-is-framed-sill-plate-to-rafters/ Sun, 15 Mar 2026 12:55:00 GMT Learn house framing from the foundation to the roof. We explain how platform framing connects the sill plate, floor joists, wall studs and rafters together.