Typar 10X150 Building Wrap delivers 67 lb MD / 73 lb CD tear strength — 5x stronger than typical house wraps. That strength translates to fewer jobsite failures when Montana’s chinook winds kick up or when crews are rushing to close in before freeze-up. The 11.7 perm rating hits the sweet spot for moisture management — breathable enough to let wall assemblies dry while still blocking wind-driven rain.
Superior Durability for Real Jobsite Conditions
The numbers tell the story on durability. Breaking strength tests at 67 pounds machine direction and 73 pounds cross direction. Trapezoidal tear resistance measures 30 lb MD / 33 lb CD. Those specs matter when you’re stapling through it, when ladders lean against it, when tools snag it.
| Specification | Value |
|---|---|
| Breaking Strength (Grab Tensile) | 67 lb MD / 73 lb CD |
| Tear Resistance | 30 lb MD / 33 lb CD |
| UV Exposure Resistance | 6 months |
| Basis Weight | 3.024 oz/yd² |
| Thickness | 12.9 mil |
The rugged woven polypropylene construction creates that strength. Customers frequently note it’s significantly stronger and more difficult to tear than competing wraps. That 6-month UV resistance rating matters too — construction delays happen, especially in short Montana building seasons. Your wrap won’t degrade while waiting for siding.
Surfactant resistance is another overlooked advantage. Cedar siding bleeds tannins. Stucco contains soaps. Typar resists these oils and tannins that can compromise other wraps. The material doesn’t support mold growth either.
Moisture Management That Works
At 11.7 perms moisture vapor transmission rate, Typar balances protection with breathability. Too permeable and wind-driven rain gets through. Too tight and wall cavities can’t dry. The hydrostatic pressure resistance exceeds 500 cm — that’s serious water holdout.
| Moisture Performance | Value |
|---|---|
| Moisture Vapor Transmission | 11.7 perms |
| Hydrostatic Pressure Resistance | >500 cm |
| Air Penetration Resistance | >2500 sec/100 cc |
| Air Leakage | 0.0032 L(S·m²) @ 75 Pa |
Tyvek has a higher perm rating (50+ vs 11.7), making it more breathable for drying in certain climates. But in Montana’s temperature swings and wind events, that extra breathability can become a liability. Typar offers significantly higher water holdout (865 cm vs ~210 cm) and superior air resistance (>2500 sec vs ~150 sec) compared to Tyvek.
The air penetration resistance over 2500 seconds per 100cc blocks drafts effectively. Combined with proper installation and taping, it creates a genuine air barrier that cuts heating costs.
Installation and Coverage
Each roll measures 10 ft x 150 ft, providing 1500 sq ft coverage. That’s enough for most of a small house with one roll. Install from bottom to top in shingle-lap fashion — standard practice but worth following precisely.
Horizontal and vertical overlaps require minimum 6 inches. Fasten with plastic-capped nails or staples every 12 to 18 inches — caps preferred for better air and water sealing. All seams must be taped with TYPAR Construction Tape, not generic tape. Flash windows, doors, and penetrations using TYPAR flashings for warranty compliance.
Wrap corners by at least 12 inches — corners fail first when shortcuts happen. Compatible with wood, vinyl, brick, stone cladding and OSB, plywood, gypsum sheathing substrates.
The Lifetime Limited System Warranty applies when installed as part of the complete TYPAR Weather Protection System, including wrap, labor, and accessories. Standard limited warranty covers individual product use.
The Verdict
Typar 10X150 earns its place on Montana jobsites through genuine performance advantages. The tear strength handles rough installation. The UV resistance buys time during delays. The moisture management specs balance protection with drying potential. At 5.0 out of 5 stars rating, contractors validate what the specs promise.
Not the cheapest wrap. Not the most permeable. But for contractors who’ve dealt with torn wrap on windy days or moisture problems from inadequate water holdout, Typar delivers measurable jobsite benefits. The woven construction and balanced specs make it particularly suited for Montana’s combination of wind events, temperature swings, and variable construction schedules.
Frequently Asked Questions
How does Typar’s 11.7 perm rating affect wall drying in Montana’s climate?
The 11.7 perm rating provides moderate breathability — enough for wall assemblies to dry during Montana’s summer months but not so open that wind-driven moisture penetrates. This rating works well with Montana’s low humidity and temperature swings that create natural drying cycles.
What makes Typar more tear-resistant than other house wraps?
The rugged woven polypropylene construction creates the superior tear resistance. With 67 lb MD / 73 lb CD breaking strength, it’s 5x stronger than typical house wraps. The woven structure resists punctures and tears better than non-woven alternatives.
Does the 6-month UV rating mean I can leave Typar exposed all summer?
The 6-month UV resistance rating provides a safety margin for construction delays, not an excuse to leave it exposed. Montana’s high-altitude UV is intense. Install siding as soon as practical, but know the wrap won’t degrade if your project stalls through a building season.
Why does surfactant resistance matter for house wrap?
Surfactant resistance allows Typar to resist oils and tannins that leach from cedar siding, treated lumber, and stucco. These chemicals can compromise the water-resistance of standard wraps, creating pathways for moisture infiltration over time.
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