Can we get samples before placing a bulk order?

Yes. Sample rolls ship by courier so your team can handle the product, check the print and run it on a test deck before you commit. Tell us which series and grammage you want to evaluate and we will arrange the shipment.

Can you print our own brand on the roll?

Yes — private-label printing is a standard part of the programme. Your logo, lap and nailing guides, contact line and safety wording can all be printed in line during production. Print plates and minimum quantities are confirmed per item.

What is the minimum order quantity?

Minimum order is one pallet (56 rolls), on any specification, for both factory-direct and US warehouse shipments. Send us your target roll spec — width, length, grammage and print — and we will confirm the MOQ for that item.

Do you supply test reports with each shipment?

Yes. Test reports are issued per order and travel with the shipping documents. If your market requires third-party testing or a specific standard, raise it at quotation stage so the test plan is agreed before production begins.

Can we audit the factory or send a third-party inspector?

Both are welcome by appointment. Let us know the scope — checklist, standard or customer requirement — and we will have the relevant batch records and production staff available on the day. Remote video walk-throughs can also be arranged.

Which markets do you export to?

We supply distributors, contractors and private-label partners across North America, Europe and Asia-Pacific, with selected lines held in US and EU warehouse stock. Contact the sales desk to confirm current availability for your destination.

Comparison

House Wrap vs Roofing Underlayment: Not Interchangeable

A wall sheds water downward along a vertical plane. A roof carries water downhill while standing on it, under foot traffic, in full sun, often for weeks before the finish layer goes on. House wrap and roofing underlayment are engineered for those two different jobs — and using one in place of the other is a common and expensive error.

Loads

Why the requirements diverge

Condition	House wrap (wall)	Roofing underlayment (roof)
Water path	Gravity drainage down a vertical plane	Water runs across the surface toward the eave
Standing water	Transient, at the cladding interface only	Can pond at laps, in valleys, behind ice dams
Foot traffic	None — installed behind cladding	Continuous during roofing; slip resistance matters
UV exposure	Months behind cladding, but vertical	Weeks to months in direct overhead sun
Attachment	Stapled or cap-nailed behind cladding	Cap-nailed with fasteners that must resist pull-through
Temperature	Moderate	Deck can run far above ambient

Properties

What each sheet is optimised for

House wrap is optimised for a high vapour permeance so the wall assembly can dry outward, combined with enough water holdout to shed bulk rain behind the cladding. Tear strength and walking-surface durability are not design priorities because nothing walks on a wall.

Roofing underlayment is optimised for the opposite set of trade-offs: resistance to fastener pull-through, resistance to hydrostatic head at laps, a slip-resistant walking surface, and tolerance of extended UV exposure before the shingles land. Vapour permeance matters, but it is balanced against water holdout rather than maximised.

Consequence

What happens when they are swapped

House wrap on a roof — tears under foot traffic, offers no slip resistance, and degrades quickly under direct sun. It is not a code-recognised steep-slope underlayment.
Underlayment on a wall — generally more robust mechanically, but many roofing sheets have far lower vapour permeance than a wall assembly needs, which risks trapping moisture in the cavity.
Either way — the product will not carry the evaluation report or standard reference the code requires for that location, which is usually what fails an inspection first.

Buyer note if a supplier quotes one sheet for “walls and roofs”, ask for the two separate data sheets and the two separate standard references. A genuine dual-purpose product exists, but it must be documented as such.

FAQ

Common questions

Is synthetic roofing underlayment ever used on walls?

Some products carry approvals for both applications, but they are the exception. The default assumption should be separate products for separate planes, each with its own data sheet.

Why does house wrap need to breathe more than underlayment?

A wall cavity is typically a vented or vented-rainscreen assembly designed to dry outward, and the cladding does not shield the wrap from the interior moisture drive. A roof deck above a vented attic has a different drying path and a different moisture load, so the permeance target differs.

Do both need to resist UV?

Both are exposed during construction, but the roof sees direct overhead sun on a horizontal surface, which is a harsher condition. Synthetic underlayments are commonly rated for a defined exposure window before the finish course is installed; felt degrades far faster under the same conditions.

Need the spec sheet behind the claim?

Tell us the product, roll spec and destination. We will send the current data sheet, test reports and a quotation against your actual requirement.

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