House wrap is the layer that goes over your wall sheathing, under the siding, to keep water and drafts out of your walls. This guide walks you through installing it with SmartFOIL Perforated step by step. It is a beginner-friendly project, and most DIYers finish an average wall in an afternoon.
Product to use: SmartFOIL Perforated. It reflects up to 95% of radiant heat, and the tiny perforations let moisture escape so it never gets trapped inside your wall.
Tools and Materials
- SmartFOIL Perforated (measure your wall area, then add about 10% for overlaps)
- Staple gun and staples
- Reflective foil tape
- Utility knife and a straightedge
- Tape measure
- 1 in. x 3 in. furring strips (optional, for an air gap)
Before You Start
- Install over solid, dry sheathing. Fix any damaged spots first.
- Pick a dry day. Wet weather makes taping and stapling harder.
- Grab a helper for long walls. It keeps the material flat and straight.
Step-by-Step House Wrap Insulation Installation
Step 1: Start at the bottom corner.
Unroll SmartFOIL Perforated horizontally along the base of the wall. Keep it flat and level as you go. Work from the bottom up so each higher row can overlap the one below.
Step 2: Staple it to the sheathing.
Fasten the barrier to the wall with staples spaced 12 to 18 inches apart. Keep the material snug and flat, not stretched tight.
Step 3: Overlap each new row.
Lay every new row so it overlaps the row beneath it by a couple of inches, like roof shingles. This lets any water run down and off the wall instead of behind it.
Step 4: Tape every seam.
Run reflective foil tape over all overlaps and joints. This seals loose edges and stops the air leaks that drive up energy bills. Don't skip any seams.
Step 5 (optional): Add furring strips.
For better performance, fasten 1 in. x 3 in. furring strips vertically over the barrier, every 2 to 3 feet. The air gap they create helps the foil reflect more heat. One layer is all you need.
Step 6: Install your siding.
Put your siding or veneer on over the barrier, or over the furring strips if you added them. That's it. Your wall is wrapped, sealed, and reflecting heat.
Quick Tips
- Keep the barrier flat and relaxed. Stretching it tight can cause tears and wrinkles.
- Always work bottom to top so rows overlap like shingles.
- Cut cleanly around windows, doors, and outlets, then tape the edges of every cut.
- If you have the room, add the air gap. It makes a real difference.
Frequently Asked Questions on House Wrap Insulation
Does this replace insulation?
No. House wrap handles moisture and drafts. Insulation handles heat transfer. They work best as a team.
Which side faces out?
Either one. SmartFOIL Perforated reflects heat on both faces, so just focus on a flat install with sealed seams.
Can I use it as a vapor barrier?
No, it is designed to breathe so moisture can escape. If you need a true vapor barrier, choose a solid, non-perforated foil instead.
Need Help Choosing?
Not sure how much you need or which product fits your wall? Explore SmartFOIL Perforated at Insulation MarketPlace, or call our team at (786) 202-0704 and we'll point you to the right fit. Every order ships free in 2 to 4 days.
